Mold Remediation cost in Renton, WA
Renton, WA · updated August 2026
$5,500
Typical local cost
$1,800 – $18,200
Typical range
- per sq ft of affected area
- $14.50 – $42.50
- Permit
- It depends
- Typical timeline
- 3-10 days of work
Installed, local pricing
$0 – $345 in fees
3-10 days of work
Renton runs +21% against the U.S. average · data confidence Medium · modeled estimate, not a quote
Most Renton homeowners pay around $5,500. The local adjustment for this trade is x1.213 — driven mainly by King County labor rates and 30% exposure to local code requirements.
Estimate your Renton job
Priced with this market's cost index, so the calculator, the size table and the ranges on this page all agree.
Square footage
180 sq ft
- With waste allowance
- 198 sq ft
- Square yards
- 20
- Perimeter (per area)
- 54 ft
- Square meters
- 16.72
Estimates only. Local pricing, site conditions and code requirements change the real number.
Cost by project size
Generated from the same unit pricing the calculator uses.
| Project size | Estimated range |
|---|---|
| 125 sq ft of affected area | $1,800 – $5,300 |
| 150 sq ft of affected area | $2,200 – $6,400 |
| 200 sq ft of affected area | $2,900 – $8,500 |
| 250 sq ft of affected area | $3,600 – $10,600 |
| 325 sq ft of affected area | $4,700 – $13,800 |
Based on Renton pricing of $15–$43 per sq ft of affected area.
Where the money goes
- Labor
- $4,100
- 72% of median
- Materials
- $1,400
- 25% of median
- Permit & fees
- $175
- 3% of median
Renton project costs+21% vs U.S. average
Based on King County labor rates, local material logistics and permit-fee posture for this trade.
What the project looks like start to finish
Typical sequence for this scope. Timing varies with contractor backlog and plan-review queues.
01
Planning & quotes
Scope, material choice, contractor selection
02
Permit application
Filed with City of Renton building department
03
Materials & staging
Order lead time on non-stock materials
04
Installation
3-10 days of work
05
Inspection
Post-remediation verification testing, Building inspection if structural repairs follow
06
Closeout
Final sign-off, warranty and documentation
Renton labor intelligence
What the trade charges here, and how much of your price it is.
Loaded hourly rate
$77–$99
Restoration crews in King County · +21% vs U.S. ($72/hr)
Typical crew
2 × 3 days
On-site time for a typical mold job here.
Labor in the price
$4,100
75% of the median — the rest is material, disposal and permit.
Because labor is 75% of this job, Renton wage levels move the price far more than material prices do. A quote well under this labor figure usually means a smaller crew, a longer schedule, or unlicensed help.
Basis: Hometriva labor model: national restoration crew rates adjusted by the King County labor factor (x1.208). · BLS Occupational Employment and Wage Statistics, Hometriva methodology
Why Renton differs from the national average
The local delta, broken into dollars by driver.
Trade labor rates+$700
King County crews price 21% above the national average, and labor is 75% of this job.
Material and delivery+$125
Materials are nationally traded, so they move less — but delivery into this market runs 10% over baseline.
Code and inspection load+$125
Mold Remediation carries 30% exposure to local code requirements, and this jurisdiction's review load indexes at x1.09.
Permit fees+$25
Fees are paid to the jurisdiction, not the contractor, and are budgeted separately from the contract price.
Basis: Decomposition of the modeled Renton median against the U.S. median for this scope. · City of Renton building department, Hometriva methodology
Renton vs Washington vs the U.S.
Change the inputs, see your number
The same local model, run against your job instead of the average one.
Simulated mold remediation in Renton
$5,675
Likely range $1,975 – $18,375
Simulated from the same local model as the numbers above — it changes the inputs, not the pricing method.
What makes the number move
- Affected square footage and number of rooms
- HVAC system contamination
- Containment and negative air equipment
- Demolition and reconstruction of affected assemblies
- Independent clearance testing
Who issues each permit
Tracked per discipline — the building permit issuer is not always the body that reviews electrical, plumbing, zoning or fire.
| Discipline | Issuing authority |
|---|---|
| building | City of Renton building departmentModeled estimate |
| electrical | City of Renton building departmentModeled estimate |
| mechanical | City of Renton building departmentModeled estimate |
| plumbing | City of Renton building departmentModeled estimate |
| zoning | City of Renton building departmentModeled estimate |
| fire | City of Renton building departmentModeled estimate |
Permit requirement in Renton
It depends on scope. Like-for-like cosmetic work in Renton is often exempt, but a permit is required as soon as you change structure, plumbing, electrical or the building envelope.
- Permitting authority
- City of Renton building departmentModeled estimate
- Permit fee
- Estimated allowance $0–$345Modeled from comparable fee schedules — not an official quoted fee.
Inspections
- Post-remediation verification testing
- Building inspection if structural repairs follow
Local conditions that change this job
Only the exposures that materially affect mold remediation.
Humidity
Severe84/100
Flood zone exposure
Moderate50/100
Annual rainfall
High74/100
Renton sits in King County, Washington. Persistent rainfall and moisture management dominate exterior detailing, while seismic provisions apply to structural and foundation work. Work outside city limits is permitted by the county building department rather than the city.
Nearby market comparison
What Renton homeowners actually paid
Real reported invoices from this market, aggregated. Add yours — it takes 20 seconds and no personal details.
Quotes homeowners were given in Renton
Quotes run ahead of final invoices. Reporting yours shows the local spread and where there is room to negotiate.
How Hometriva estimates Renton mold costs
Hometriva does not publish invented city prices. The Renton estimate for mold remediation is produced by this chain, and every input is stored separately:
- National baseline$4,500
Typical U.S. cost for mold remediation on a single-family home.
- Local labor factorx1.208
Renton-area trade labor rates, weighted at 75% of this job.
- Material factorx1.105
Material and delivery pricing into King County, weighted at 25%.
- Regulatory factorx1.086
Local code, product-approval and inspection load, applied at 30% for this project type.
- Applied multiplierx1.213
Blended Renton adjustment specific to mold remediation.
- Permit component$0 – $345
Budgeted separately from the contract price because it is paid to the jurisdiction.
Because labor, material and regulatory factors are weighted per project, mold remediation in Renton carries a different local adjustment than other trades in the same market.
Reviewed by
Hometriva Cost Data Desk
Maintains the unit-cost baselines, local adjustment factors and material pricing. Reviewed for mold remediation pricing in Renton, WA.
- • National unit-cost baselines against current trade pricing
- • Local labor and materials factors for the market
- • Material installed-cost ranges and service life
Last reviewed August 2026 · Editorial standards · Report an error
Frequently asked questions
Does Florida license mold remediation?
Yes. Florida requires separate licenses for mold assessors and mold remediators, and with limited exceptions the same company cannot both assess and remediate the same property — which protects you from inflated scope.
Sources
Sources & verification
Last verified August 2026. Cost figures are modeled estimates based on national baselines adjusted for local labor and material pricing — they are not quotes. Permit rules change; confirm with the building department before starting work.