Building permits, zoning and land rules in Fircrest, Washington

At a glance

Building permits

City building permit and design review required for ADUs¹

Zoning

Fircrest zoning applies inside city limits²

Septic authority

Tacoma-Pierce County Health Department³

Accessory dwellings

Allowed conditionally; generally limited to 1,000 square feet¹

Owner-builder

State contractor-registration exemption has conditions; building permits still apply⁵

Electrical work for ADUs

Separate electrical service/permit through Tacoma Public Utilities⁶

Who to call

Contact details are copied from each office’s official page and were checked against it on October 15, 2026.

Do you need a building permit in Fircrest, WA?

Fircrest requires design review and a building permit for an accessory dwelling unit, and its ADU guidance says work on an existing building, plumbing system or mechanical system requires a city permit.¹⁷ That guidance is specifically about ADUs: ask the city Planning and Building Department to identify the building, plumbing and mechanical applications for your particular project.⁷⁴

Washington’s owner-builder exemption concerns contractor registration and does not remove applicable building permits or inspection requirements; work on your own property for sale, demolition or lease falls outside that exemption.⁵

Who issues building permits in Fircrest, and how do you apply?

Start with the Fircrest Planning and Building Department, whose Permit Center accepts required documents by email at permits@cityoffircrest.net.⁴ The department describes its building-permit process as paperless and says applicants will be notified when the building permit is ready for pickup and what fee is due.⁴

For a Fircrest ADU, the submittal includes a building permit application, design review application, floor plans and a site plan.⁶ Electrical service and the separate electrical permit go through Tacoma Public Utilities, rather than being covered by the city ADU application.⁶ Use the city Permit Center’s inspection-scheduling link when arranging building inspections.⁴

Does Fircrest have zoning, and what does it mean for an ADU?

Fircrest has city zoning, with allowed uses listed by zone in the city’s zoning code.² Fircrest allows ADUs in nearly all residential zones, provided the lot meets the minimum lot size for the principal dwelling and the ADU meets the zone’s development standards.¹

Fircrest generally limits an ADU to 1,000 square feet, with exceptions for converting an entire floor or an existing larger garage.¹ Setbacks, floor area ratio, lot coverage and impervious-surface standards still apply to an ADU.¹ Before sizing a detached unit, ask Planning and Building to identify the parcel’s zone and the applicable development standards; the Permit Center links the zoning map and land-development code.⁴

How do septic permits work inside Fircrest?

The Tacoma-Pierce County Health Department regulates septic-system installation and wells in Pierce County, including the health requirements separate from Fircrest’s city building review.³ Washington requires a local-health-officer septic permit before installation, repair, modification, connection or expansion of an on-site sewage system, except a minor repair.⁸

A septic application includes the drinking-water source, sewer-utility status, soil and site evaluation, site plan and detailed system design.⁸ Ask the Health Department about a parcel’s existing system and proposed sewage load before committing to an ADU design; Fircrest’s building-permit approval and the health department’s septic review address separate requirements.¹³⁸

Can you live in an RV or tiny home in Fircrest?

We could not confirm Fircrest’s rules for residential RV occupancy, temporary camping or tiny homes on wheels; ask the Fircrest Planning and Building Department about the exact structure and intended occupancy before purchasing one.⁴ Fircrest’s verified ADU pathway requires design review, a building permit and compliance with the zone’s development standards.¹

For land outside Fircrest, use the Pierce County guide: the county’s zoning administration covers unincorporated land, while incorporated-city parcels follow the city’s zoning.⁹ A county rule for an unincorporated parcel therefore does not establish that the same housing use is allowed inside Fircrest.⁹

Building a home in Fircrest: what should you do first?

Start by asking Fircrest Planning and Building to identify the parcel’s zoning and the city building applications for your proposed home; the city Permit Center provides residential building applications, the zoning map and land-development code.⁴ For an ADU, establish that the lot qualifies and that the design meets development standards before preparing the building and design-review applications, floor plans and site plan.¹⁶

If the parcel uses septic, ask the Tacoma-Pierce County Health Department what sewage-system approval the project needs before construction begins.³⁸ Submit the city’s required documents by email, then use the Permit Center’s building-inspection scheduling link as work progresses.⁴

Watch-outs

• We could not confirm Fircrest’s minimum dwelling size or district-specific lot-size and setback figures; ask Planning and Building for the standards applicable to your parcel.⁴
• Fircrest ADUs require both design review and a building permit; satisfying the size limit alone does not establish approval.¹

Sources

1. ADU Information & FAQ - City of Fircrest (Fircrest), quoted and re-checked
2. ADU Information & FAQ - City of Fircrest (Fircrest), quoted and re-checked
3. Regulations and Procedures, quoted and re-checked
4. Fircrest Planning and Building Department (cityoffircrest.net)
5. RCW 18.27.090 — Exemptions (Washington statewide rule), quoted and re-checked
6. ADU Information & FAQ - City of Fircrest (Fircrest), quoted and re-checked
7. ADU Information & FAQ - City of Fircrest (Fircrest), quoted and re-checked
8. WAC 246-272A-0200 Permit requirements (Washington statewide rule), quoted and re-checked
9. Zoning/Land Use - Designations, quoted and re-checked

Written October 15, 2026 from the rules quoted below, each taken from an official source and re-checked by an independent reviewer. This is research, not legal advice: rules change, so confirm with the office before you buy or build.