Three-Season Room Addition in Bellevue, WA — Costs $11,857 to $96,337
What does three-season room addition cost in Bellevue? Average $37,053, ranging $11,857–$96,337. Labor runs $48.94/hr locally — 48% above the national average. Free breakdown with material + labor split.
Bellevue, WA Market
+48% vs nationalLabor Rate
$48.94/hr
Material Index
136
Avg Permit Cost
$2,365
Median Home Price
$582,044
Bellevue is a mid-sized city in Washington with a healthy pool of local contractors. Homeowners generally have several options to compare for a three-season room addition, which helps keep pricing competitive. At 48% above the national average, Bellevue 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 $582,044, this three-season room addition represents just 6.4% of typical home value — a relatively small investment that can significantly boost curb appeal or functionality.
Low Estimate
$11,857
National: $8,000
Mid-Range
$37,053
National: $25,000
High End
$96,337
National: $65,000
Per Sq Ft
$141
National: $95
Three-Season Room Addition Cost Calculator for Bellevue
Adjusted for Bellevue's labor rate ($48.94/hr) and material costs (index 136).
Mid-grade materials, good quality fixtures, standard options.
Estimated Total in Bellevue
$37,053
Based on 200 sq ft at mid quality, adjusted for Bellevue market rates.
Local Cost Breakdown
At Bellevue's average rate of $48.94/hr (63% above national avg)
Material cost index 136 (36% above national baseline of 100)
Three-Season Room Addition vs. Home Value in Bellevue
| Metric | Bellevue | National Avg |
|---|---|---|
| Three-Season Room Addition (Mid-Range) | $37,053 | $25,000 |
| Median Home Price | $582,044 | $350,000 |
| Project as % of Home Value | 6.4% | 7.1% |
| Estimated ROI | 50% | 50% |
| Median Household Income | $94,385 | $75,000 |
What Affects the Price in Bellevue
- 1Local labor rates ($48.94/hr in Bellevue)
- 2Material cost index (136 vs national 100)
- 3Size
- 4Foundation type
- 5Screen vs window panels
- 6Roof style
Popular Upgrades
- Interchangeable screen and window panels
- Ceiling fans
- Outdoor-rated furniture
Other Projects in Bellevue, WA
Second Story Addition
$299,133
Accessory Dwelling Unit (ADU) Construction
$224,350
Room Addition
$134,610
Swimming Pool Installation
$95,455
Home Addition
$118,568
Inground Swimming Pool
$94,573
Attic Conversion
$83,008
Swimming Pool Construction
$75,462
Three-Season Room Addition in Other Washington Cities
Planning a Three-Season Room Addition in Bellevue
Building permits are typically required for a three-season room addition in Bellevue. The average permit fee in this area is $2,365, though costs vary based on project scope. Permit fees in this market are above average — factor them into your total budget. Plan for 2-4 weeks from start to finish.
A three-season room addition is a complex project best left to licensed professionals. In Bellevue, skilled contractors charge an average of $48.94/hr, and the specialized nature of this work means cutting corners on labor can lead to costly rework.
With a median household income of $94,385, many Bellevue residents can budget for this project through savings. The mid-range cost of $37,053 represents 39% of the typical household's annual income.
Three-Season Room Addition — National Guide
See the full national cost guide with DIY tips, cost factors, and ROI analysis.
All Construction Costs in Bellevue
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