Lake Forest Park, Washington Building Permit Guide

In Lake Forest Park, the City’s Community Development Department issues and inspects building, mechanical, plumbing, right-of-way and sewer permits, and every application is filed online through the City’s iWorQ permit portal; paper plans are no longer taken at the counter. The City does not issue or inspect electrical permits; those are bought from the state Department of Labor and Industries (L&I), whose Seattle office sits at Northgate (2111 N Northgate Way), and sprinkler and other fire permits go through Shoreline Fire. Under the 2026 fee schedule, plan review is 65% of the permit fee, and a building permit here is short-lived: 180 days, with a hard limit of 360.

City Hall is at 17425 Ballinger Way NE (main line 206-368-5440). The planning and building permit counter is open Monday to Thursday, 9 a.m. to noon and 1 to 3 p.m., and the Permit Coordinator is at 206-957-2813. The City had 13,191 residents in the Census Bureau’s 2025 estimate.

Lake Forest Park permits cover land inside the city limits; King County handles unincorporated land outside them.

What requires a building permit in Lake Forest Park?

The City’s own administrative code, chapter 15.06 of the Lake Forest Park Municipal Code (LFPMC), sets the exemption list in section 15.06.205. It is tighter than the state residential code in two places: sheds and playhouses are exempt only up to 120 sq ft, and fences only up to 6 feet. Everything else that the codes regulate needs a permit, and a separate permit is needed for each building.

Two web answers differ from the adopted code. The City’s FAQ says decks need a permit under the residential code, but LFPMC 15.06.205 exempts low decks that meet the conditions above. The FAQ’s fence advice is a zoning limit: fences under 4 feet in the front yard (or within 20 feet of the front lot line) and under 6 feet in back, kept out of sight-distance triangles.

The mechanical list exempts portable heating, cooling and ventilation equipment, small self-contained refrigeration units and like-for-like part replacement; the plumbing list exempts stopping leaks, clearing stoppages and reinstalling prefabricated fixtures without moving pipes or valves.

What the city decides and what the state holds

LFPMC 15.04.015 (most recently amended by Ordinance 1292 in 2024) adopts the 2021 International Building, Residential, Mechanical, Fire, Fuel Gas and Existing Building codes, the Uniform Plumbing Code without its administration chapter, the state energy code and all state appendices, with the State Building Code Council’s amendments. The City’s choices are the exemption list, the permit time limits, its fire code amendments (including fire flow) and its fees, which the City Council sets.

Washington has a mandatory statewide building code under chapter 19.27 RCW that every city and county enforces and may make stricter; electrical permits come from the Department of Labor and Industries unless the city runs its own program or Tacoma Power serves the site. Building codes in Washington

Lake Forest Park building department: who handles permitting

Community Development reviews and inspects building, mechanical, plumbing, right-of-way and sewer work, and handles planning, critical areas, shoreline and tree permits. Building questions go to bldpermits@cityoflfp.gov and inspection questions to bldinspections@cityoflfp.gov; the Building Official takes code enforcement calls at 206-957-2815.

The City warns of scam emails that copy its logo and planners’ names and ask for wire transfers: Lake Forest Park never asks for a wire transfer and invoices only through iWorQ.

Permit types

Residential permits

The 2026 building checklist (Help Topic 1.1) lists the minimum for a new home, addition or remodel: the application, legal description, an authorization if an agent applies, and a contractor’s bid for labor and materials. An owner building the work themselves lists materials and costs and doubles the total to give the valuation. The site plan must be to scale, preferably 1 inch to 10 or 20 feet, with contours at 5-foot intervals or less, setbacks, distances to any nearby critical area, easements, the driveway and the building height calculated from average existing grade. The City also publishes design criteria, a 2021 energy code checklist and a deck checklist.

New homes are valued at fixed rates in the 2026 schedule: $170.80 per sq ft for a standard home, $206.65 for a custom home designed for its lot and $69.64 for a garage or utility building. Mechanical and plumbing permits start at a $150 base fee plus $30 per item, such as a furnace, heat pump, water heater or fixture; gas piping is $30 for up to 10 outlets and $5 for each one after that. Work valued under $500 pays a flat $145 administration permit fee.

Building or remodeling a home here? Alliance handles residential permit expediting, so the crew isn't waiting on the counter.

Commercial permits

Commercial projects use the same valuation table and 65% plan review, the commercial state surcharge, and required hourly plan review for commercial plumbing and grease interceptors ($145 an hour). Commercial site development permits cost $2,000 (Type III, decided by the code administrator) or $3,500 (Type I, hearing examiner), and Town Center design review $2,000 for minor or $4,000 for major projects. Fire alarm and sprinkler permits are issued by Shoreline Fire.

For tenant improvements and new commercial builds, Alliance handles commercial permit applications through issuance. More on this: commercial building permits explained.

What comes before the building permit

Critical areas, shoreline, trees and sewer usually come first. A critical area work permit is $85 (minor), $125 (tree-related) or $550 (major); a shoreline exemption is $500 and a substantial development permit $3,500; SEPA review is $750, and a clearing and grading permit $120 (minor) or $300 (major). Tree permits cost $120 at application plus the Urban Forest Planner’s review at $95 an hour for major removals, which also need an arborist report, and notice is posted for 2 business days (minor) or 14 days (major) before the permit can issue.

The City runs the sanitary sewer: a certificate of sewer availability is $100, a single-family sewer connection $5,034, a side sewer permit with two inspections $300, and drainage review for a house $300, or $600 when an engineered plan is needed. Lots on septic fall under Public Health – Seattle & King County. A pre-application or regulatory review meeting is billed by the hour.

Lake Forest Park permit costs and fees

Fees come from the City’s adopted 2026 User Fee Schedule, Resolution 25-2047 of November 20, 2025. Valuation uses the ICC building valuation data of August 2025, with a regional modifier allowed under LFPMC 15.06.370, and covers all permanent work, including electrical, plumbing, heating and roofing; the plan review fee is paid when plans are submitted (a deposit may be taken) and the balance at issuance.

The bands join up: each one begins where the one below ends. Worked example. On a $60,000 addition, Lake Forest Park’s permit fee is $1,178.20 ($1,068.40 for the first $50,000 plus 10 × $10.98). Plan review at 65% ($765.83) and the $6.50 single-family state surcharge make $1,950.53; the 10% technology surcharge, any mechanical or plumbing permit and the L&I electrical permit are added to that.

Trade permits and who may pull them

Electrical work is entirely outside the City’s system: Lake Forest Park does not issue or inspect electrical permits and is not on L&I’s list of local electrical programs, so the permit and its inspections come from L&I. Mechanical and plumbing permits are City permits, inspected by the City; on their own they expire after 180 days, and with a building permit they expire with it.

How to apply for a Lake Forest Park building permit

Review, corrections and what causes delay

Accepting an application does not mean it is complete, and missing checklist items can stop it at intake. An application expires if no permit is issued within one year (one extension of up to 180 days is possible), and it can be cancelled if the applicant does not answer a correction request within 90 days.

Inspections in Lake Forest Park

Inspections are scheduled in the iWorQ portal, only after a permit is issued (a receipt is not a permit), at least 24 hours and no more than two weeks ahead. Building inspections run Monday to Thursday, with none on Fridays or national holidays, and right-of-way inspections only on Mondays, Wednesdays and Thursdays. Inspectors expect a paper copy of the permit and the stamped plans on site, and inspection questions go to bldinspections@cityoflfp.gov or the Permit Coordinator at 206-957-2813.

Under LFPMC 15.06.245 a building permit expires 180 days after issuance unless extended in writing; it can be renewed once for 180 days for a fee if the plans are unchanged, and no building permit lasts beyond 360 days. Once a permit has expired, a new permit and full new fees are needed.

Lake Forest Park permit search and official resources

The iWorQ portal shows open permits and their status, and the City’s help sheet explains how to search it. Lake Forest Park participates in the National Flood Insurance Program, and FEMA lists its current effective map as August 19, 2020.

• Lake Forest Park Permit Center: applying, payments, inspections
• Applications and forms
• iWorQ permit portal
• 2026 building checklist, Help Topic 1.1 (PDF)
• Fee schedule page
• 2026 User Fee Schedule, Resolution 25-2047 (PDF)
• How to schedule inspections (PDF)
• How to look up permit status (PDF)
• Lake Forest Park Municipal Code (Title 15)
• L&I list of cities with their own electrical permits

Lake Forest Park building permit FAQ

Who issues building permits in Lake Forest Park?

The City’s Community Development Department at City Hall, 17425 Ballinger Way NE; the Permit Coordinator is at 206-957-2813. The City sends electrical work to L&I.

Can I drop off paper plans?

No. All applications and plans are submitted online through the iWorQ portal, though payment is made by phone or at City Hall.

How much is a building permit in Lake Forest Park?

For a $60,000 project the 2026 permit fee is $1,178.20 and plan review $765.83, plus the $6.50 state surcharge and the technology surcharge.

Do I need a permit for a shed?

Yes if it is over 120 sq ft. The City’s exemption stops at 120 sq ft, below the 200 sq ft in the state residential code.

How long does a building permit last?

180 days, renewable once for 180 days for a fee; no permit lasts more than 360 days.

When are inspections done?

Monday to Thursday, booked in the portal 24 hours to two weeks ahead; right-of-way inspections only on Monday, Wednesday and Thursday.

Do I need a permit to remove a tree?

Tree permits cost $120 at application; major removals also need an arborist report and hourly review by the Urban Forest Planner.

Simplify Lake Forest Park permitting with Alliance Permitting

Alliance Permitting is a permit documentation and submission company in Washington. We prepare your paperwork, file it correctly and coordinate with the permitting authority through issuance. We are not a contractor and we do not perform licensed plan review or inspections; that work stays with your licensed team and the jurisdiction.

This guide is provided by Alliance Permitting for general information about Lake Forest Park permitting. Requirements, fees, and procedures change; confirm details with the permitting authority before relying on them.