Second Story Addition in Renton, WA — Costs $109,173 to $682,333
What does second story addition cost in Renton? Average $272,933, ranging $109,173–$682,333. Labor runs $44.98/hr locally — 36% above the national average. Free breakdown with material + labor split.
Renton, WA Market
+36% 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 second story addition, which helps keep pricing competitive. At 36% 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 second story addition represents just 48.7% of typical home value — a relatively small investment that can significantly boost curb appeal or functionality.
Low Estimate
$109,173
National: $80,000
Mid-Range
$272,933
National: $200,000
High End
$682,333
National: $500,000
Per Sq Ft
$409
National: $300
Second Story 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
$272,933
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)
Second Story Addition vs. Home Value in Renton
| Metric | Renton | National Avg |
|---|---|---|
| Second Story Addition (Mid-Range) | $272,933 | $200,000 |
| Median Home Price | $560,000 | $350,000 |
| Project as % of Home Value | 48.7% | 57.1% |
| 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)
- 3Total square footage added
- 4Structural reinforcement of first floor
- 5Staircase addition
- 6Roof removal and replacement
Popular Upgrades
- Master suite
- Additional bedrooms
- Jack-and-Jill bathroom
Other Projects in Renton, WA
Accessory Dwelling Unit (ADU) Construction
$204,700
Room Addition
$122,820
Swimming Pool Installation
$86,953
Garage Addition
$75,057
Home Addition
$108,096
Inground Swimming Pool
$86,077
Attic Conversion
$75,797
Swimming Pool Construction
$68,907
Second Story Addition in Other Washington Cities
Planning a Second Story Addition in Renton
Building permits are typically required for a second story 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 4-8 months from start to finish.
A second story 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 $272,933 represents a significant investment. Consider financing options or phasing the work to spread costs over time.
Second Story Addition — National Guide
See the full national cost guide with DIY tips, cost factors, and ROI analysis.
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