Chapter 17C.30
INTERNATIONAL RESIDENTIAL CODE Revised 12/18

Sections:

17C.30.010    Adoption of International Residential Code.

17C.30.020    Creation of Enforcement Agency.

17C.30.030    Appointment.

17C.30.040    Work Exempt from Permit. Revised 12/18

17C.30.045    Determination of Damage.

17C.30.050    Time Limitation of Application.

17C.30.060    Expiration.

17C.30.070    Building Permit Fees.

17C.30.080    Building Permit Valuation.

17C.30.090    Refunds.

17C.30.100    Board of Appeals.

17C.30.110    Violation Penalties.

17C.30.120    Maximum Height of Buildings.

17C.30.125    Table R301.2(1) – Climate and Geographic Design Criteria.

17C.30.130    Fire Sprinkler Systems.

17C.30.140    Premises Identification.

17C.30.160    Appendix E – Manufactured Housing Used as Dwellings.

17C.30.010 Adoption of International Residential Code.

The edition of the International Residential Code, except Chapters 11 and 25 through 42, currently, or hereafter, adopted and amended by the State Building Code Council and included in Title 51 of the Washington Administrative Code, including Appendix Chapters E, F, G, H, J, K, Q, and U, are adopted as the Residential Code for the unincorporated areas of Pierce County, except that the amendments to the International Residential Code in this Chapter shall govern over the published provisions of the Building Code. The effective date of subsequent editions of the International Residential Code in Pierce County shall coincide with the effective date of their adoption and amendment by the State Building Code Council. Provided further, that Chapters 11, and 25 through 43 are not adopted. (Ord. 2016-85s § 1 (part), 2016; Ord. 2010-44s § 7 (part), 2010; Ord. 2007-55s § 6 (part), 2007; Ord. 2004-30s § 5 (part), 2004)

17C.30.020 Creation of Enforcement Agency.

Section R103.1 of the International Residential Code is deleted. See PCC 17C.10.030, "Creation of Enforcement Agency." (Ord. 2010-44s § 7 (part), 2010; Ord. 2004-30s § 5 (part), 2004)

17C.30.030 Appointment.

Section R103.2 of the International Residential Code is deleted. (Ord. 2010-44s § 7 (part), 2010; Ord. 2004-30s § 5 (part), 2004)

17C.30.040 Work Exempt from Permit. Revised 12/18

Section R105.2 of the International Residential Code is amended as follows:

1.    One story detached accessory structure used as unheated tool and storage sheds, playhouses and similar uses, provided the floor area does not exceed 200 square feet (18.58 m2) and it is at least three feet from a property line.

2.    Fences not over 6 feet (1829 mm) high.

3.    Retaining walls that are not over 4 feet (1219 mm) in height measured from the bottom of the footing to the top of the wall, unless supporting a surcharge.

4.    Water tanks supported directly upon grade if the capacity does not exceed 5,000 gallons (18-927 L) and the ratio of height to diameter or width does not exceed 2 to 1.

5.    Decks, sidewalks, and driveways not more than 30 inches above grade at any point and not over any story or basement below.

6.    Painting, papering, tiling, carpeting, cabinets, counter tops and similar finish work.

7.    Swimming pools accessory to a Group R-3 occupancy that are less than 24 inches (610 mm) deep.

8.    Self contained Spas and hot tubs installed entirely above ground and not connected to the potable water system nor to a drain into a septic or sewer system.

9.    Swings and other playground equipment.

10.    Window Awnings:

a.    Fixed window awnings supported by an exterior wall that do not project more than 54 inches (1372 mm) from the exterior wall and do not require additional support.

b.    Retractable window awnings, motorized or manual pull out, supported by an exterior wall that do not exceed 200 square feet (18.58 m2).

11.    The re-roofing of Group R, Division 3 One and Two-Family Dwellings and Group U, private garages, carports and accessory structures having a roof slope greater than 2" in 12", when the total load of all roof coverings does not exceed 7.5 pounds per square foot. This exemption does not apply to vegetated roofs.

This exemption does not apply to the replacement of roof sheathing.

12.    The re-siding of Group R, Division 3 One and Two-Family Dwellings and Group U, private garages, carports and accessory structures.

This exemption does not apply to the replacement of wall sheathing, shear walls, or weather resistant exterior described in IRC Section 703.

13.    The installation or relocation of an accessory membrane-covered frame structure where the floor area does not exceed 576 square feet in area and the structure is assembled and anchored per manufacturer's recommendations.

14.    One-story detached accessory agriculture structure up to 600 square feet on land where agriculture activities are allowed as identified under Title 18A PCC, Development Regulations – Zoning, provided:

a.    The proposed structure must meet the definition of an agriculture structure as defined in the International Building Code, Section 202.

b.    The property owner must certify through the use of an affidavit recorded on title:

(1)    That the exempt structure will meet the definition of an agriculture structure;

(2)    That the structure is not located within a wetland or regulated fish and wildlife species and habitat conservation area unless it meets the exemption provisions under Title 18E PCC, Development Regulations – Critical Areas;

(3)    That it complies with setback requirements in accordance with Title 18A PCC, Development Regulations – Zoning; and

(4)    That it is built to the latest version of the International Residential Code and International Building and Fire Code.

c.    Plumbing and mechanical permits are still required.

d.    The maximum height of the structure does not exceed 14 feet.

e.    The exemption applies only to parcels five acres or greater in size. The number of exempt structures is not to exceed two per parcel.

f.    The exemption does not apply to structures located within a floodway.

g.    The proposed structure must adhere to other applicable Pierce County, State, and Federal regulations or ordinances.

Exemption from the permit requirements of this code shall not be deemed to grant authorization for any work to be done in any manner in violation of the provisions of this code or any other laws or ordinances of Pierce County.

(Ord. 2018-68s § 2 (part), 2018; Ord. 2016-85s § 1 (part), 2016; Ord. 2014-66s § 1 (part), 2014; Ord. 2010-44s § 7 (part), 2010; Ord. 2007-55s § 6 (part), 2007; Ord. 2004-30s § 5 (part), 2004)

17C.30.045 Determination of Damage.

Section R105.3.1.1 of the International Residential Code is amended to read as follows:

R105.3.1.1 Determination of substantially improved or substantially damaged existing buildings in flood hazard areas. For applications for reconstruction, rehabilitation, addition or other improvement of existing buildings or structures located in an area prone to flooding as established by Table R301.2(1), the Building Official shall examine or cause to be examined the construction documents and shall prepare a finding with regard to the value of the proposed work.

For buildings that have sustained damage of any origin, the value of the proposed work shall include the cost to repair the building or structure to its pre-damaged condition. If the Building Official finds that the value of proposed work equals or exceeds 50 percent of the market value of the building or structure before the damage has occurred or the improvement is started, the finding may be appealed as provided in PCC 17C.10.060.

Applications determined to constitute substantial improvement or substantial damage shall require all existing portions of the entire building or structure to meet the requirements of Section R322, and Title 18E PCC.

(Ord. 2016-85s § 1 (part), 2016; Ord. 2010-44s § 7 (part), 2010; Ord. 2007-55s § 6 (part), 2007)

17C.30.050 Time Limitation of Application.

Section R105.3.2 of the International Residential Code is deleted. See PCC 17C.10.110, "Application Expiration." (Ord. 2010-44s § 7 (part), 2010; Ord. 2004-30s § 5 (part), 2004)

17C.30.060 Expiration.

Section R105.5 of the International Residential Code is deleted. See PCC 17C.10.130, "Permit Expiration." (Ord. 2010-44s § 7 (part), 2010; Ord. 2004-30s § 5 (part), 2004)

17C.30.070 Building Permit Fees.

Section R108.2 of the International Residential Code is deleted. See PCC 17C.10.070, "Fees." (Ord. 2010-44s § 7 (part), 2010; Ord. 2004-30s § 5 (part), 2004)

17C.30.080 Building Permit Valuation.

Section R108.3 of the International Residential Code is deleted. See PCC 17C.10.070, "Fees." (Ord. 2010-44s § 7 (part), 2010; Ord. 2004-30s § 5 (part), 2004)

17C.30.090 Refunds.

Section R108.5 of the International Residential Code is deleted and replaced with the following:

Section 108.5 The Building Official is authorized to establish a refund policy.

(Ord. 2010-44s § 7 (part), 2010; Ord. 2004-30s § 5 (part), 2004)

17C.30.100 Board of Appeals.

Section R112 of the International Residential Code is deleted. See PCC 17C.10.060, "Appeals." (Ord. 2014-4s § 1 (part), 2014; Ord. 2010-44s § 7 (part), 2010; Ord. 2004-30s § 5 (part), 2004)

17C.30.110 Violations.

Section R113 of the International Residential Code is deleted. See PCC 17C.10.050, "Violations and Penalties." (Ord. 2010-44s § 4 (part), 2010; Ord. 2004-30s § 5 (part), 2004)

17C.30.120 Maximum Height of Buildings.

Section R202 of the International Residential Code is amended to add the following:

HEIGHT, BUILDING. The vertical distance from grade plane to the average height of the highest roof surface. The maximum height of buildings shall be subject to the requirements of this code, Title 18A and Title 20 of the Pierce County Code. In the event of any conflict between these regulations, the most restrictive shall govern.

(Ord. 2010-44s § 7 (part), 2010; Ord. 2004-30s § 5 (part), 2004)

17C.30.125 Table R301.2(1) – Climatic and Geographic Design Criteria.

Footnote "g." to Table 301.2(1) shall be deleted and replaced with the following:

g.    The jurisdiction shall fill in this part of the table with (a) the date of the jurisdiction's entry into the National Flood Insurance Program (date of adoption of the first code or ordinance for management of flood hazard areas), (b) the date(s) of the Flood Insurance Study, and (c) the panel numbers and dates of all currently effective FIRMs and FBFMs or other flood hazard map adopted by the authority having jurisdiction, as amended.

References to coastal high-hazard areas (V zones) in Section R322 shall be designated as coastal flood zones and any reference to zone V shall be designated as a zone X as described in Title 18E PCC.

(Ord. 2010-44s § 7 (part), 2010)

17C.30.130 Fire Sprinkler Systems.

Section R313 of the International Residential Code is amended by adding the following section:

Section R313.4. Approved automatic sprinkler systems shall be installed in any structure containing five or more townhouse units. A voluntarily installed automatic fire sprinkler system in townhouses or one- and two-family dwellings shall be in accordance with Appendix R, Dwelling Unit Fire Sprinkler Systems found in WAC 51-51-60105.

(Ord. 2010-44s § 7 (part), 2010; Ord. 2004-30s § 5 (part), 2004)

17C.30.140 Premises Identification.

Section R319 of the International Residential Code is amended by adding a second paragraph as follows:

Signs on private roads shall be installed in accordance with Chapter 12.52 of the Pierce County Code, "Addressing and Grid System for Pierce County." The premises identification requirements of this section must be met prior to final inspection by the Building Division.

(Ord. 2010-44s § 7 (part), 2010; Ord. 2004-30s § 5 (part), 2004)

17C.30.160 Appendix E – Manufactured Housing Used as Dwellings.

Appendix E of the International Residential Code shall be replaced as follows:

Chapter E Installation Standards for Mobile/Manufactured Homes.

Cross-references: RCW 43.22.340-43.22.445; WAC 296-150I; Pierce County Code Title 18A; National Fire Protection Association (NFPA) 501A

AE 101 Definitions for the Purposes of this Section.

A.    "Awning" means a shade structure supported by posts or columns, or partially supported by a mobile/manufactured home; installed, erected, or used on a mobile/manufactured home site.

B.    "Cabana" means a portable, demountable, or permanent room enclosure or other building erected or constructed for human occupancy.

C.    "Carport" means an awning or shade structure for a vehicle or vehicles that may be either free-standing or partially supported by a mobile/manufactured home.

D.    "Community building" means any nonresidential building used for mobile home community purposes.

E.    "Dead load" means the vertical load due to the weight of all permanent structural and nonstructural components of a building, such as walls, floors, roofs and fixed service equipment.

F.    "Department of Labor and Industries" means the Washington State Department of Labor and Industries.

G.    "HUD" means the Federal Department of Housing and Urban Development.

H.    "Live load" means the load superimposed by the use and occupancy of the building not including the wind load, earthquake load or dead load.

I.    "A Manufactured Home (Housing)" as defined in PCC 18.25.030 and reprinted here: means a factory-assembled structure intended solely for human habitation with foundation skirting that surrounds and encloses that space between the home and finished grade. The skirting or fascia shall be made of materials which give the home the appearance of permanent installation with running gear removed and connected to utilities on an individual building site. A common type of manufactured home includes double-wide mobile homes.

J.    "Manufactured Home/Mobile Home" as defined in PCC 18.25.030 means a structure, transportable in one or more sections, which is built on a permanent chassis and is designed for use with or without a permanent foundation when connected to the required utilities. For floodplain management purposes, the term "manufactured home/mobile home" also includes park trailers, travel trailers, and other similar vehicles placed on a site for greater than 180 consecutive days. For insurance purposes, the term "manufactured home/mobile home" does not include park trailers, travel trailers, recreational vehicles, or other similar vehicles.

K.    "Mobile Home" as defined in PCC 18.25.030 means a factory-assembled structure intended solely for human habitation and equipped with the necessary service connections and made so as to be readily moveable as a unit on its own running gear. A mobile home is considered a single-wide unit.

L.    "Mobile home park" as defined in PCC 18.25.030 means a tract of land designed and maintained under a single ownership or unified control where two or more spaces or pads are provided solely for the placement of mobile or manufactured homes or recreational vehicles for permanent occupancy for residential purposes with or without charge. A mobile home park shall not include mobile home subdivisions or recreational vehicle parks or where mobile homes are permitted as a principal use and accessory dwelling unit on the same lot.

M.    "Mobile home park," "manufactured housing community," or "manufactured/ mobile home community" as defined in RCW 59.20.030(10) means any real property which is rented or held out for rent to others for the placement of two or more mobile homes, manufactured homes, or park models for the primary purpose of production income, except where such real property is rented or held out for rent for seasonal recreational purpose only and is not intended for year-round occupancy.

N.    "Ramada" means any free-standing roof or shade structure, installed or erected above a mobile/manufactured home or any portion thereof.

O.    "Recreational vehicle" RCW 59.20.030(17) means a travel trailer, motor home, truck camper, or camping trailer that is primarily designed and used as temporary living quarters, is either self-propelled or mounted on or drawn by another vehicle, is transient, is not occupied as a primary residence, and is not immobilized or permanently affixed to a mobile home lot.

P.    "Recreation vehicle" WAC 296-150R-0020 is a vehicular type unit primarily designed as living quarters for recreational camping, travel, or seasonal use that either has its own motive power or is mounted on, or towed by, another vehicle. Recreational vehicles include: camping trailers, fifth-wheel trailers, motor homes, travel trailers, and campers.

AE 102 General Installation Requirements for Mobile/Manufactured Homes.

Installation or placement of a new and relocated mobile/manufactured homes are regulated by the Washington Administrative Code (WAC) 296-150I-0310. Mobile/ manufactured homes are required to be installed in accordance with the manufacturer's instructions. If the manufacturer's instructions do not address an aspect of the installation an applicant may get specific instructions from the manufacturer or from a State licensed architect or engineer or the applicant may use the American National Standard Institute (ANSI) standard ANSI A225.1 Manufactured Home Installation, 1994 edition.

AE 103 County Standards for Installation or Placement of Mobile/Manufactured Homes.

The installation and use of mobile/manufactured homes for permanent or temporary living quarters shall be permitted when all of the following conditions have been met:

A.    All mobile/manufactured homes not previously located in Pierce County shall bear a tag or seal of approval of the State of Washington Department of Labor and Industries and/or HUD. All mobile/manufactured homes presently located in Pierce County which do not bear a tag or seal of approval of the Department of Labor and Industries and/or HUD can be relocated only within a mobile home park.

B.    The mobile/manufactured home shall be provided with anchors and tie-downs able to withhold a minimum wind load and corresponding uplift pressure of twenty pounds per square foot.

C.    If a mobile/manufactured home does not have a HUD or Department of Labor and Industries tag, a Fire Safety inspection shall be performed by the Department of Labor and Industries.

If the unit passes inspection the Department of Labor and Industries will place an alteration tag noting the Fire Safety inspection (A F/S). This tag will satisfy paragraph A. above. A permit may then be issued by Pierce County to locate the unit.

If the Department of Labor and Industries does not tag the unit, but rather provides the citizen with a list of corrections, proof of this inspection shall be presented to the building official prior to the issuance of a building permit. The unit may not be lived in until these corrections have been inspected by the Department of Labor and Industries. The Department of Labor and Industries will then tag the unit. A final field inspection of the installation is then required by the Pierce County, Division of Building Safety and Inspection.

D.    No person shall make alterations to the living space of or impose any live loads/dead loads on a mobile/manufactured home unless an application for such alterations has been filed with and approved by the Department of Labor and Industries and County, Division of Building Safety and Inspection.

Cross-reference:     RCW 46.16.100-.115, State Regulations Regarding Transporting and Licensing

AE 104 Movement of Mobile/Manufactured Homes – Over Legal Load Permit Required.

Any person, sales company, or corporation desiring to transport a mobile/manufactured home on the streets, roads and highways of Pierce County shall secure a permit from the County Planning and Public Works Department, Franchises and Right-of-Way Section as provided in Chapter 10.28 PCC.

AE 105 Mobile/Manufactured Homes – Application For Building Permit.

No mobile/manufactured home shall be erected, installed, or located in Pierce County unless a building permit has first been obtained from the building official. No such permit shall be issued unless and/or until all of the following are satisfied:

A.    The permittee or authorized agent shall present proof of ownership. Proof of ownership shall be considered valid only if the Washington State Use Tax has been paid at the time of purchase, as evidenced by presentation of the title or application for transfer of title.

B.    The application contains the parcel number of the property upon which the mobile/manufactured home is to be situated, provided that when the mobile/manufactured home is being placed into an authorized mobile home park or court the name and space number of the mobile home court will suffice.

C.    Permit fees for mobile/manufactured homes are set forth in PCC Chapter 17C.10 Table 17C.10-1-G, item 8.

D.    Permit fees for foundation ready manufactured homes are set forth in PCC Chapter 17C.10, Table 17C.10-1-G, item 8.

E.    A Mechanical permit is required for any gas piping connection.

AE 130 General Installation Requirements for Recreational Vehicles

Section AE130 applies to a recreational vehicle used as a primary residence placed in a manufactured/mobile home community, as defined in RCW 59.20.030. Installation or placement of a new and relocated recreational vehicles are regulated by the Revised Code of Washington (RCW) 36.01.225 and the Washington Administrative Code (WAC) 296-150R. Recreational Vehicles are required to be installed in accordance with the manufacturer's instructions.

Recreational vehicles are otherwise covered in PCC Title 18, Title 18A and Title 18E

AE 130.1 Recreational Vehicle – Application For Building Permit.

No recreational vehicle shall be erected, installed, or located in Pierce County unless a building permit has first been obtained from the Building Official. No such permit shall be issued unless and/or until all of the following are satisfied:

1.    Payment of permit fees. The permit fee for recreational vehicles shall be the same as mobile/manufactured homes as set forth in PCC Chapter 17C.10, Table 1 G, item 8.

2.    A mechanical permit is required for any gas piping connection.

3.    A plumbing permit is required for connection to a water system and or a sewage disposal system.

4.    A site plan showing only 1 recreational vehicle is being installed in an existing space within a manufactured/mobile home community.

5.    The space where the recreational vehicle is being installed,requires utility hookups to meet state or federal building code standards for manufactured/mobile home communities; or includes one of the following provisions:

a.    A recreational vehicle must contain at least one internal toilet and at least one internal shower; or

b.    If the requirement in (5)(a) of this subsection is not met, a manufactured/mobile home community must provide toilets and showers.

6.    The recreational vehicle must meet the setbacks established for manufactured/mobile homes located in the same manufactured/mobile home community. See Section AE 106.

7.    The recreational vehicle must have a landing and stair meeting the requirements of Chapter 3 of the International Residential Code.

8.    Recreational vehicles installed as a primary residence placed in a manufactured/ mobile home community, shall be subject to the restrictions in PCC 18E for the placement of a dwelling in flood zones.

Exception: If the recreational vehicle is provided with approved quick-disconnects on all utilities and is readily movable in the event of a flooding event.

AE 130.2 Accessory Structures

Accessory structures associated with recreational vehicles shall meet the requirements of Sections AE 107 and AE 108.

AE 130.3 Required Inspections

The following inspections are required for the installation of recreational vehicles:

1.    A "Final Inspection" is required for the installation of recreational vehicles and includes:

a.    Setbacks

b.    Address or space number

c.    Confirming the placement is adequate and installed in an approved manner.

d.    Landings, stairs, handrails and guards.

e.    Final grade

f.    Holds released, other departments approved.

2.    Plumbing Inspection:

a.    Water service connection, materials installed and connections.

b.    Cross connection control approval or atmospheric vacuum breaker if hose connection.

c.    Building drain line installed and connected.

d.    Water heater relief line plumbed to the exterior and aimed down.

3.    Mechanical connections:

a.    Proper gas piping materials and connections when connected to site gas utility.

b.    Mechanical and LPG tank permit(s)

AE 106 Mobile/Manufactured Home Setbacks and Fire Safety Separation Requirements Within Mobile Home Parks.

Mobile/manufactured homes and accessory buildings located in a mobile home park lawfully established after May 5, 1980, must comply with current applicable zoning regulations, previous approvals or possess legally established nonconforming use rights.

Mobile/manufactured homes to be located within mobile home parks established prior to May 5, 1980, shall be governed by the following provision: No portion of any mobile/manufactured home, excluding the tongue, shall be located closer than:

ten feet side to side,

eight feet end to side,

or six feet end to end horizontally

from any other mobile/manufactured home or community building unless the exterior walls and roof of either structure are without openings and constructed of materials that will provide a one-hour fire rating or the structures are separated by a one-hour fire-rated barrier.

AE 107 New Construction – Accessory Building Setback Requirements in Non Conforming Mobile Home Parks.

New accessory buildings or structures may be located immediately adjacent to a pad site line, provided the building or structure is constructed entirely of materials that do not support combustion and provided that the building or structure is not less than three (3) feet from an accessory building or structure on an adjacent site.

New accessory buildings or structures constructed of combustible materials shall not be located closer than five (5) feet from the pad site line of an adjoining site.

AE 108 Existing Accessory Building.

The provisions of Section AE 107 shall not apply to lawfully established, existing accessory buildings or structures in mobile home parks.

Additions, alterations, or repairs to an existing lawfully established, accessory buildings or structures may require a building permit. Such modifications shall not cause building setbacks in AE 106 to be in violation.

AE 109 Mobile/Manufactured Homes – Building Permit Issuance.

When all County, state and federal laws, ordinances, Codes and regulations are satisfied, a permit will be issued to the owner of the mobile/manufactured home. The permit will show the name of the owner; the Assessor's parcel number the location for which the permit was issued; the make, model, serial number and year of manufacture of the mobile/manufactured home; the date the permit was issued; and the permit number, if any.

AE 110 Mobile/Manufactured Homes – Building Permit Duration.

Each building permit shall be valid only for the location for which issued, and none other. Each time the mobile/manufactured home is moved within the County, a new building permit shall be required.

AE 120 Required Inspections.

The following inspections are required for the installation of mobile/manufactured homes and foundation ready manufactured homes.

1.    "Footing Setback" inspections are required for any foundation ready manufactured home.

2.    "Foundation Wall" inspections are required for any foundation ready manufactured home.

3.    "Set Up" inspections are required of all mobile/manufactured homes and includes:

a.    Setbacks

b.    Pier blocks, size and location.

c.    Marriage line connection (where units are bolted or lagged together).

d.    Plumbing connections:

1)    Water service connection, materials installed and connections, trench.

2)    Building drain line installed and connected, tested by the installer.

3)    Water heater relief line plumbed to the exterior and aimed down.

e.    Mechanical connections:

1)    Gas pipe test.

2)    Heat duct crossover.

3)    Dryer vent duct to exterior wall.

f.    Crawlspace shall be graded to allow drainage.

g.    Ground cover (6-mil poly).

4.    "Final" inspections are required of all mobile/manufactured homes and includes:

a.    Site and EVA access, Building Address and Street Signage.

b.    Skirting and crawl space vents.

c.    Crawl space access.

d.    Landings, stairs handrails and guards.

e.    Final grade.

f.    Mechanical and LPG tank permit(s)

g.    Approvals of other departments and or divisions

h.    Cross connection control approvals

i.    Installer tag sign off.

(Ord. 2017-12s § 2 (part), 2017; Ord. 2010-44s § 7 (part), 2010; Ord. 2004-30s § 5 (part), 2004)