Home Addition in Renton, WA — Costs $40,536 to $270,240
What does home addition cost in Renton? Average $108,096, ranging $40,536–$270,240. Labor runs $44.98/hr locally — 35% above the national average. Free breakdown with material + labor split.
Renton, WA Market
+35% vs nationalLabor Rate
$44.98/hr
Material Index
123
Avg Permit Cost
$1,646
Median Home Price
$560,000
Renton is a mid-sized city in Washington with a healthy pool of local contractors. Homeowners generally have several options to compare for a home addition, which helps keep pricing competitive. At 35% above the national average, Renton is one of the more expensive markets for home improvement — driven primarily by above-average labor rates in the region. With a median home price of $560,000, this home addition represents just 19.3% of typical home value — a relatively small investment that can significantly boost curb appeal or functionality.
Low Estimate
$40,536
National: $30,000
Mid-Range
$108,096
National: $80,000
High End
$270,240
National: $200,000
Per Sq Ft
$20
National: $15
Home Addition Cost Calculator for Renton
Adjusted for Renton's labor rate ($44.98/hr) and material costs (index 123).
Mid-grade materials, good quality fixtures, standard options.
Estimated Total in Renton
$108,096
Based on 200 sq ft at mid quality, adjusted for Renton market rates.
Local Cost Breakdown
At Renton's average rate of $44.98/hr (50% above national avg)
Material cost index 123 (23% above national baseline of 100)
Home Addition vs. Home Value in Renton
| Metric | Renton | National Avg |
|---|---|---|
| Home Addition (Mid-Range) | $108,096 | $80,000 |
| Median Home Price | $560,000 | $350,000 |
| Project as % of Home Value | 19.3% | 22.9% |
| Estimated ROI | 60% | 60% |
| Median Household Income | $68,000 | $75,000 |
What Affects the Price in Renton
- 1Local labor rates ($44.98/hr in Renton)
- 2Material cost index (123 vs national 100)
- 3Material quality
- 4Labor rates
- 5Project size
Popular Upgrades
- Premium materials
- Custom design
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Planning a Home Addition in Renton
Building permits are typically required for a home addition in Renton. The average permit fee in this area is $1,646, though costs vary based on project scope. Permit fees in this market are above average — factor them into your total budget. Plan for 1-2 weeks from start to finish.
A home addition is a complex project best left to licensed professionals. In Renton, skilled contractors charge an average of $44.98/hr, and the specialized nature of this work means cutting corners on labor can lead to costly rework.
For the median Renton household earning $68,000/year, this project at $108,096 represents a significant investment. Consider financing options or phasing the work to spread costs over time.
Home Addition — National Guide
See the full national cost guide with DIY tips, cost factors, and ROI analysis.
All Construction Costs in Renton
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