The short answer
An interior designer in Seattle charges $57 to $520 an hour, and one room runs $520 to $1,700 for design alone. Washington does not regulate interior design, so anyone can use the title. What matters most is who stamps the drawings if your project needs a permit.
What interior designers cost in Seattle
The ranges below start from national cost data and apply the Seattle construction cost factor of 1.15 from the U.S. Army Corps of Engineers, the average of Tacoma (1.07) and the Puget Sound bases (1.21). They cover design fees. Furniture is extra.
| Job | Seattle (typical range) | US average |
|---|---|---|
| Interior designer, per hour | $57–$520/hr | $50–$450/hr |
| In-home consultation | $57–$520 | $50–$450 |
| One room, design only | $520–$1,700 | $450–$1,500 |
| One room, design and furnishing | $1,150–$13,800 | $1,000–$12,000 |
| Whole home, per sq ft | $6–$19.5/sq ft | $5–$17/sq ft |
| Whole home, 2,000 sq ft | $11,500–$39,100 | $10,000–$34,000 |
Estimates for 2026, including labor and standard parts. Seattle prices use a construction cost factor of 1.15 (US average = 1.00) from the U.S. Army Corps of Engineers Area Cost Factors, based on drawn from Tacoma (1.07) and Puget Sound bases (1.21). Your quote depends on access, materials and the condition of the home.
Fees move with the size of the job, the designer's experience and how much buying they do for you. A firm principal bills near the top of the hourly range and a junior designer near the bottom. A whole-home project is usually priced per square foot, so a 2,000 square foot house lands between $11,500 and $39,100.
The cost estimator asks about your rooms and scope, then applies the rate for your ZIP code.
How Seattle designers bill
Most firms pick one fee structure, and many combine two on the same project, for example hourly for the concept and cost plus for the furniture. The national figures are HomeGuide's interior design cost data.
| Fee structure | National range | What you are paying for |
|---|---|---|
| Hourly | $50 to $450 | Time, logged and billed |
| Flat fee per room | $1,000 to $12,000 | A fixed scope for one room |
| Per square foot | $5 to $17, average $9 | Whole-home or large remodel work |
| Percent of construction cost | 10% to 30%, average 20% | Design on a remodel priced as a share of the build |
| Cost plus | 17% to 30% added to product and trade costs | The designer buys and marks up |
| Markup on retail | 10% to 35% | A markup on furnishings at retail price |
Charges that surprise people
A retainer is normally due at signing. HomeGuide puts it at about 10% of the project, nonrefundable, and some firms ask for 10% to 50% up front. Product deposits can reach 50% of the furniture the firm orders for you. A designer who manages trades during construction usually adds a management fee of about 25%. Travel time is often billed at half the hourly rate, which adds up when the designer drives from Seattle to a job in Tacoma or Everett. CAD drawings are often billed separately.
On a package of furniture and trade work, the cost-plus fee is the markup percentage applied to that package.
Sales tax on furnishings and design fees
Washington has no personal or corporate income tax, but businesses pay a business and occupation (B&O) tax on gross receipts. The Department of Revenue puts interior design and consulting income under the Service and Other Activities classification. The B&O tax has no deductions for labor, materials or travel.
Retail sales tax is separate. The Department of Revenue says the taxable amount includes charges for permits and other fees, labor, profit, materials and subcontractor charges, even when those are billed separately. Sales tax must appear as its own line on the invoice. If the invoice shows only a lump sum, the Department presumes the tax was neither paid nor collected, and the seller is still liable for it.
Where the tax applies depends on what is delivered. For goods delivered to you, the local rate is set by where you receive them. For installation or construction work, the local rate is set by where the work is mostly performed. A Bellevue designer furnishing a Redmond house collects at the Redmond rate on delivered goods.
If the design fee and the goods are listed separately, the design fee is taxed under Service and Other Activities B&O and the goods under retail sales tax and Retailing B&O. If the contract is mostly a real property improvement, the whole contract amount is subject to Retailing B&O and retail sales tax is collected on all of it. Ask the designer how your contract is written, because it changes the tax line.
Washington's rules for interior designers
Interior design is not regulated in Washington. A 2026 House bill report states that anyone may do interior design work and anyone may use the title of interior designer. There is no state license, no registration and no protected title for residential interior design.
A bill has been introduced that would create a separate registration for commercial interior design, with a misdemeanor penalty and a civil penalty of up to $1,000 per offense. It is not law. If it passes, it would cover commercial work only, not the house or condo you live in.
What a designer can draw
The building code sets the line, not a design license. Washington has adopted the International Building Code and International Residential Code as its state building code, and cities and counties may amend it locally as long as they do not lower the minimum standards.
The Architect's Act exempts several kinds of work from the architect requirement. A person may prepare plans for their own private residential use. Design work is allowed without an architect for residential buildings of up to four dwelling units, for buildings of any occupancy up to 4,000 square feet, and for alterations of up to 4,000 square feet in a larger building when the work does not touch life safety or structural systems.
That covers most Seattle-area houses and most single-room projects. The Washington Attorney General's office notes that a permit may require drawings prepared and stamped by a licensed architect or professional engineer, and that local building officials decide case by case which documents are acceptable. Stamping architectural drawings by a non-architect violates the Architect's Act.
The House bill report adds that, depending on the project type and size, some local building officials require plans prepared by an interior designer to be approved by an architect or engineer before they go to the building department.
If your project removes a bearing wall, adds a beam, adds square footage or changes the structural system, bring in an architect or structural engineer. GOLDGCP's residential design guide covers that side, and the structural coordination guide explains how the engineer fits in. For drawings that will go to a permit counter, see permit drawings.
Do you need a permit?
Interior design itself needs no permit. The work it leads to often does, and the rules differ by city.
What does not need a permit
King County lists interior finishes such as carpet, hardwood flooring, tile, paint and wallpaper as exempt in unincorporated areas. Replacing windows in the same openings is also exempt. The county suggests bringing basement egress windows up to current code with a permit where possible. Fences 6 feet or less, most retaining walls 4 feet or less, and uncovered decks 30 inches or less above grade are exempt unless the property has critical areas.
Redmond exempts removal and replacement of exterior windows in existing openings when the size and opening are not altered and the operable opening is not made smaller. It also exempts interior door swaps in existing frames.
What does need one
A building permit is required for projects that change occupancy, construct, enlarge, alter, repair, move or demolish a building. In Redmond that means new houses, additions, remodels, ADUs, decks, garage conversions and accessory structures. Bellevue lists remodels with no structural work among the projects that can require a permit, along with ADUs, decks, reroofs and water heater replacement. Everett requires a residential permit for remodeling, additions, re-roofs, decks, porches and exterior stairs on one- and two-family homes. Tacoma and Pierce County run their own residential permit processes.
Mechanical permits are separate. King County requires one to install, enlarge, move or replace a fireplace, wood stove, furnace, air conditioner or heat pump. If your design moves a range hood, adds a gas fireplace or swaps a heat pump, that permit is part of the job.
Where to file
Most King County permits go through MyBuildingPermit.com, and the county runs digital plan review through ProjectDox. King County Permitting answers questions at 206-296-6600 or PermitQuestions@kingcounty.gov. Bellevue's Permit Center is at 425-452-4898 or permits@bellevuewa.gov, with in-person service Monday to Thursday, 10 a.m. to 3 p.m. Redmond's Development Services Center is at 15670 NE 85th Street, open 8 a.m. to 5 p.m. Monday, Tuesday, Thursday and Friday and 10:30 a.m. to 5 p.m. Wednesday. Tacoma's Permit Center is at 747 Market Street, Third Floor, reachable at (253) 591-5030. Everett Permit Services is at 2930 Wetmore Ave, 2nd Floor, at 425-257-8810, with counter hours Monday, Wednesday and Thursday, 8:30 a.m. to 12 p.m. and 1 p.m. to 3 p.m. Renton's permit center is at 1055 South Grady Way, at 425-430-7294.
King County staff will not call you asking for credit or debit card information. They send invoices with online or check payment instructions. Everett adds a 2.3% credit card convenience fee on permit payments.
For build costs once the design is set, see the Seattle kitchen remodeling guide and the Seattle bathroom remodeling guide.
How long design takes in Seattle
Schedules depend on the scope and on how fast you make decisions. HomeGuide's architect guide gives a yardstick for projects that need drawings: first concept drafts arrive 2 weeks to 1 month after the first meeting, and a full set of plans ready for permits takes 2 to 6 months. A furnishing-only project skips the drawings and the city, so the wait is mostly furniture lead times.
| Project | What sets the pace |
|---|---|
| Furnish or restyle a room | Your decisions, then order and delivery times |
| Kitchen or bath, same layout | Selections, then the city permit |
| Kitchen or bath with wall changes | Floor plans, then plan review |
| Remodel touching structure | Architect and engineer drawings, then plan check |
Changes after drawings are finished cost the most time, because plans may need to go back through review. Bellevue offers a Predevelopment Services Review that gives feedback before you submit a permit application.
How to check an interior designer before you hire
- Ask what they will draw and who stamps anything structural. Washington does not license designers, so the answer tells you more than any credential.
- Look at completed Seattle-area projects of a similar size and budget.
- Get the fee structure in writing, including any markup, retainer, product deposit and management fee.
- Ask how sales tax will be shown on the invoice, and whether the design fee and goods are billed separately.
- Ask whether they carry errors and omissions insurance.
- Make sure the contract lists the number of revision rounds and what happens if you change your mind after drawings are done.
- If the designer also offers to build the project, look up their contractor registration with the Washington State Department of Labor & Industries. Contractors must be registered in Washington, and it is a criminal penalty to hire or act as an unregistered contractor.
A registered contractor must carry a bond and insurance, and you can take action against the bond. Registration is also a prerequisite for a contractor to sue you over a project. For milestone payment practices, see how payment protection works.
Areas we cover
GOLDGCP matches homeowners with interior designers across the Seattle metro, including:
- Seattle
- Bellevue
- Redmond
- Kirkland
- Tacoma
- Everett
- Renton
Enter your ZIP code to see design prices for your area and get matched.
How GOLDGCP works
- Tell us about the room or project through the form, a call or WhatsApp.
- You see prices for your ZIP code before anyone visits, and we match you with up to 3 vetted pros.
- Our in-house architects take over the parts that touch structure, permits or an addition.
- You approve each stage and release each milestone payment, and you follow the project in the client portal.
Pros pass six-step vetting before they get a job: state license verification, an insurance check, a business and public-records check, portfolio review, client reference calls, and onboarding with a quality score. For plumbing on a kitchen or bath redesign, see our Seattle plumbing guide.
Frequently asked questions
How much does an interior designer cost in Seattle?
Most Seattle projects come to about $520 to $1,700 for one room designed, or $1,150 to $13,800 if the designer also furnishes it. Hourly rates run $57 to $520. A whole 2,000 square foot home runs $11,500 to $39,100. Furniture, sales tax and any markup are on top.
Do interior designers need a license in Washington?
No. Interior design is not regulated in Washington, and anyone may use the title. A bill to register commercial interior designers has been introduced but is not law. Structural work still needs a licensed architect or engineer.
Can an interior designer remove a wall in my Seattle home?
They can plan it, but the structural part needs an architect or engineer if the wall is load bearing. Washington exempts residential buildings of up to four dwelling units from the architect requirement, but local building officials decide which drawings they will accept for a permit.
Do I need a permit to redo my kitchen in Bellevue?
Often yes. Bellevue lists remodels with no structural work among projects that can require a permit, and mechanical work such as a new range hood or water heater needs its own permit. Bellevue's Permit Center answers questions at 425-452-4898.
How do Seattle designers charge for furniture?
Usually through cost plus, with 17% to 30% added to product and trade costs, or a markup on retail of 10% to 35%. Product deposits of up to 50% are common. Ask how Washington sales tax is shown, since the Department of Revenue requires it as a separate line.
Does Washington tax interior design services?
Design fees are subject to B&O tax under the Service and Other Activities classification. Retail sales tax applies to goods and to real property improvement contracts. The local rate depends on where goods are delivered or where the work is mostly performed.
How long does a design project take in the Seattle area?
A furnishing-only room moves at the speed of your decisions and furniture lead times. Projects that need drawings take 2 weeks to 1 month for first concepts and 2 to 6 months for a permit-ready set. Bellevue's Predevelopment Services Review can catch problems before you submit.
How we calculate these prices
GOLDGCP starts from national price ranges for each job, taken from published 2026 cost guides and checked against local price guides where they exist. To get a local price, we multiply the national range by the construction cost factor for the metro from the U.S. Army Corps of Engineers Area Cost Factors (US average = 1.00). Where that table has no entry for a metro, we use the nearest listed location or the state value. For ZIP codes outside the 50 largest metros, the cost estimator uses the state's price level from the Bureau of Economic Analysis Regional Price Parities. Ranges include labor and standard materials but not unusual site conditions, so a written quote after an inspection is always the final price.
Sources
About this guide
Written by the GOLDGCP editorial team. Prices come from national cost guides adjusted with official construction cost factors for Seattle; rules and statistics come from the agencies and reports linked in the text. We update this page when prices or codes change.