Lead paint rules for older homes in Washington (2026):
when a contractor must be RRP-certified, and testing costs
DO CONTRACTORS NEED LEAD PAINT CERTIFICATION IN WASHINGTON?
Yes, for paid work on homes built before 1978. The Washington Department of Commerce says anyone paid to work on residential property built before 1978 must be an RRP Certified Renovator with a firm certification, or work for a certified firm, when the work disturbs painted surfaces. Small jobs are exempt: 6 square feet or less of painted surface per room inside, or 20 square feet or less outside, but any window replacement counts. Angi puts a lead paint inspection in Seattle at $333 to $778, with an average of $556.
Who needs RRP certification
- Pre-1978 homes. The Department of Commerce says: "If you receive compensation to perform work on any residential property or child-occupied facility built before 1978, then you must be an RRP Certified Renovator with a firm certification, or you must work for a certified firm."
- Firm and person. A certified firm needs an owner or employee with an individual RRP certification, and the certified individual must supervise or perform the work.
- Training. Individuals complete a course through a Washington State-accredited training provider.
- What counts as renovation. Under WAC 365-230-310, a renovation is any change to an existing structure that disturbs painted surfaces.
The small-job exemption, and why windows don't count
| Work | RRP rules apply? |
|---|---|
| Disturbs 6 sq ft or less of painted surface per room, inside | No (minor repair and maintenance) |
| Disturbs 20 sq ft or less of painted surface, outside | No (minor repair and maintenance) |
| Replacing any window, of any size | Yes |
| Demolishing painted surfaces | Yes |
| Using prohibited practices (such as torch burning) | Yes |
That matters for common projects on older homes: window replacement, siding replacement and kitchen remodels usually disturb more paint than the exemption allows.
Lead paint testing cost in Seattle
| Method | Reported cost (Angi, Seattle) |
|---|---|
| Visual assessment | $110–$220 |
| Dust wipe sampling | $220–$665 |
| XRF analysis | $330–$665 |
| Lab testing | $445–$790 |
| Average inspection | $556 (typical $333–$778) |
The Department of Commerce says certified professionals are needed for lead inspections, risk assessments and permanent hazard elimination (abatement).
Hiring a contractor for an older home
- Ask for the firm's Washington RRP certification and the name of the certified renovator who will be on the job.
- To check a certification, contact the Department of Commerce Lead-Based Paint Program (LBPInfo@Commerce.wa.gov).
- Check the contractor's registration on L&I's Verify a Contractor tool, and keep the first payment small: see contractor down payments.
- Repainting the outside? See exterior house painting cost in Seattle.
- Older homes may also contain asbestos: see asbestos testing and removal cost.
Frequently asked questions
Do contractors need lead paint certification in Washington?
Yes, for paid work that disturbs paint on homes built before 1978. The Department of Commerce says the worker must be an RRP Certified Renovator with a firm certification, or work for a certified firm.
Does replacing windows in an old house require RRP?
Yes. Window replacement of any size is excluded from the minor repair exemption, so it's a renovation under Washington's rule and EPA guidance.
How much paint can be disturbed without RRP rules?
6 square feet or less per room inside, or 20 square feet or less outside, as long as the work doesn't involve window replacement, demolition of painted surfaces or prohibited practices (WAC 365-230-310).
How much does a lead paint inspection cost in Seattle?
Angi puts the average at $556, usually $333 to $778. A visual assessment runs $110 to $220 and XRF analysis $330 to $665.
Who runs the lead paint program in Washington?
The Washington State Department of Commerce, Lead-Based Paint Program, which certifies firms and renovators and accredits training providers.
About these prices. The ranges are published estimates from the sources below, as of the dates shown. Material costs, labor rates, tariffs and inflation can change prices after those dates, and your home may differ. Use them to plan a budget, then get written quotes from licensed contractors.
Sources
- Washington State Department of Commerce — Renovation, Repair and Painting (RRP) and Lead-based paint in Washington homes
- WAC 365-230-310 — Definitions
- U.S. EPA — Guidance on minor repair and maintenance activities
- Angi — Lead paint inspection cost in Seattle, WA
All sources accessed November 10, 2026.
This guide summarizes Washington and federal rules and published cost estimates. It is not legal advice. For questions, contact the Department of Commerce Lead-Based Paint Program. See our disclosure and disclaimer.