What changes a remodel in Renton.
One in nine Renton homes dates from the 1940s or 1950s
Of Renton's 42,551 homes in the Census Bureau's 2020 to 2024 survey, 4,836 were built between 1940 and 1959. The median year built is 1988. Much of that older stock traces to May 1942, when the Federal Public Housing Authority began building homes for Boeing and PACCAR war workers east of the old town, in the area called Renton Highlands. That wartime housing went up quickly, so a remodel in a house from those decades usually means new wiring, insulation and a close look at the foundation before any finish work starts.
Abandoned coal mines run under parts of Renton
The city's hazard mitigation plan says that as a former coal-mining town, Renton has many abandoned coal mines crisscrossing the underground landscape. It adds that parts of the city have a high water table and soils prone to landslide or subsidence, and that sinkholes have opened in roadways and pipeline corridors within the past five years. The same plan flags downtown and the Cedar River floodplain as a high liquefaction risk area, meaning wet soil there can lose strength in an earthquake. Renton's critical areas rules cover old mine hazards along with steep slopes and flood zones, so check your lot on the city's COR Maps before you design footings for an addition.
Source: City of Renton, Hazard Mitigation Plan Annex (draft, January 2025)
Renton offers eight free, pre-approved ADU plans
Through its Permit Ready ADU program, Renton gives residential owners eight designed and engineered model plans for an accessory dwelling unit, a small second home on the same lot. They run from 415 to 1,000 square feet in several architectural styles. Owners who pick one work with city staff one on one on the site plan and get an expedited review. To book the pre-screening meeting you need photos of your yard from all four sides, a rough site plan showing where the unit would go, and the model and style number. The program won a VISION 2050 award from the Puget Sound Regional Council.
What a remodel costs in Renton in 2026.
$672,600
We found no Renton permit valuation data to open, so the city-level numbers below are Census figures. Renton's median owner-occupied house was worth $672,600 in the 2020 to 2024 survey, and owners paying a mortgage spent a median $2,828 a month on housing. Electricity heats 56.2 percent of occupied homes here and gas 40.5 percent, which matters when you price a heat pump against a new furnace.
For kitchens, the Seattle edition of the 2025 Cost vs Value survey put a midrange minor kitchen remodel, meaning new cabinet fronts, counters, sink and appliances in the same layout, at $32,271. It was one of only three projects in that report worth more at resale than they cost, recouping 118.1 percent. Someone also has to run the job, and that costs more here: in May 2025 first-line supervisors of construction trades around Seattle, Tacoma and Bellevue, the lead carpenters and foremen who coordinate a remodel, earned a median $58.24 an hour, against $38.42 across the country.
| Figure | Value | What it measures |
|---|---|---|
| Median home value | $672,600 | Owner-occupied homes in Renton, Census ACS 2020-2024 (Census ACS 2020-2024, Median Value, Renton) |
| Median monthly owner costs with a mortgage | $2,828 | Mortgage, taxes, insurance and utilities for Renton owners with a mortgage, Census ACS 2020-2024 (Census ACS 2020-2024, Monthly Owner Costs, Renton) |
| Homes heated with electricity | 56.2% | Share of occupied Renton homes whose main heating fuel is electricity; gas heats 40.5 percent (Census ACS 2020-2024, House Heating Fuel, Renton) |
| Midrange minor kitchen remodel, Seattle | $32,271 | Seattle average in Cost vs Value 2025; 118.1 percent recouped when the house sells (Cost vs Value 2025, Seattle) |
| Median construction supervisor wage | $58.24 an hour | First-line supervisors of construction trades, Seattle area, May 2025; the U.S. median was $38.42 (BLS OEWS May 2025, Seattle-Tacoma-Bellevue first-line supervisors of construction trades) |
Who issues permits in Renton.
Inside city limits, Renton Permit Services issues building, mechanical, plumbing and electrical permits itself. Simple over-the-counter permits go through the city's Civic Access Self-Service Portal, which is open around the clock. Projects that need a plan review are submitted by email to the permit technicians at PermitTech@rentonwa.gov.
- City of Renton Permit Services
Building, electrical, mechanical, plumbing and reroof permits, plus ADU and critical areas review, inside Renton city limits
- Mechanical, electrical, plumbing, residential solar and reroof permits can be filed online at any hour through Renton's Civic Access Self-Service Portal.
- A reroof on a single-family house needs a permit when the roof sheathing is replaced. Any structural change to the roof goes through plan review.
- A deck needs a Renton permit once it stands more than 30 inches above grade, measured anywhere within 5 feet of its edge.
- A separate civil or utility permit applies when a project adds or replaces 500 square feet of hard surface, or disturbs 7,000 square feet of land.
- Owners may do their own work, but a homeowner taking out an electrical permit must have lived in the house for at least three years.
- Renton has no Basics program, so every permit needs its own set of plans. The city issues no certificate of occupancy for a single-family home; the final inspection takes its place.
- Remodels and additions may be worked on from 7 a.m. to 10 p.m. on weekdays and from 9 a.m. to 10 p.m. on weekends.
What Renton homeowners plan most.
Heating and cooling
Electricity heats more than half of Renton homes. Mechanical permits for a furnace or heat pump swap can be filed online through the city portal.
Kitchen remodel
In a 1940s or 1950s Renton house, a kitchen job can open walls with original wiring. Our kitchen guide was written for Seattle; in Renton the plumbing and electrical permits come from Renton Permit Services.
Roofing
On a house, Renton asks for a reroof permit when sheathing is replaced, and it can be filed online.
Deck building
Renton's permit line for decks is 30 inches above grade, measured within 5 feet of the edge.
ADU or garage conversion
Renton hands out eight free, pre-approved ADU plans from 415 to 1,000 square feet. The Seattle ADU guide we link covers design and budgeting; Renton runs its own review for these units.
Before you start.
How much does a kitchen remodel cost in Renton?
We could not open any Renton permit values, so look to Seattle: the 2025 Cost vs Value figure for a midrange minor kitchen remodel, which keeps the layout and replaces fronts, counters, sink and appliances, is $32,271. Moving walls or plumbing costs more. In Renton, where the median home was valued at $672,600 in Census data for 2020 to 2024, that minor remodel recouped 118.1 percent at resale in the Seattle report.
Do I need a permit to replace my roof in Renton?
On a single-family house, Renton requires a reroof permit when the roof sheathing is replaced, and any structural change to the roof needs plan review. Reroof permits are simple over-the-counter permits, so you can file one at any hour through the city's Civic Access Self-Service Portal. Questions go to the permit technicians at 425-430-7215.
Can I build an ADU in Renton?
Yes. Renton's Permit Ready ADU program gives owners eight free, pre-approved plans from 415 to 1,000 square feet. You book a pre-screening meeting with photos of your yard from four sides, a rough site plan and the model you want, then work with city staff on the site plan and go through an expedited review.
Are there old coal mines under Renton?
Yes, in some areas. Renton's hazard mitigation plan says many abandoned coal mines crisscross the ground under this former coal-mining town, and that sinkholes have opened in roadways and pipeline corridors within the past five years. The city's critical areas rules cover mine hazards, so check your parcel on COR Maps before planning an addition or new foundation.
Can I do my own electrical work in Renton?
You can work on your own property in Renton, but for electrical work there is a condition: a homeowner taking out the electrical permit must have lived in the house for at least three years. Renton issues electrical permits itself through its online portal. Any work in the public right of way needs a licensed, bonded contractor.
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Sources
- Census ACS 2020-2024, Year Structure Built, Renton
- City of Renton, Hazard Mitigation Plan Annex (draft, January 2025)
- City of Renton, Permit Ready ADU Program
- Census ACS 2020-2024, Median Value, Renton
- Census ACS 2020-2024, Monthly Owner Costs, Renton
- Census ACS 2020-2024, House Heating Fuel, Renton
- Cost vs Value 2025, Seattle
- BLS OEWS May 2025, Seattle-Tacoma-Bellevue first-line supervisors of construction trades
- HistoryLink, Renton Highlands Library history
- City of Renton, Critical Areas Ordinance update
- City of Renton, Building Permits FAQ
- BLS OEWS May 2025, national first-line supervisors of construction trades