Three-Season Room Addition in Boston, MA — Costs $12,761 to $103,685
What does three-season room addition cost in Boston? Average $39,879, ranging $12,761–$103,685. Labor runs $53.91/hr locally — 60% above the national average. Free breakdown with material + labor split.
Boston, MA Market
+60% vs nationalLabor Rate
$53.91/hr
Material Index
143
Avg Permit Cost
$3,166
Median Home Price
$512,971
As one of the largest metros in Massachusetts, Boston has a competitive contractor market with hundreds of licensed professionals. This typically gives homeowners more leverage on pricing, though high demand for renovations can offset that advantage. At 60% above the national average, Boston 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 $512,971, this three-season room addition represents just 7.8% of typical home value — a relatively small investment that can significantly boost curb appeal or functionality.
Low Estimate
$12,761
National: $8,000
Mid-Range
$39,879
National: $25,000
High End
$103,685
National: $65,000
Per Sq Ft
$152
National: $95
Three-Season Room Addition Cost Calculator for Boston
Adjusted for Boston's labor rate ($53.91/hr) and material costs (index 143).
Mid-grade materials, good quality fixtures, standard options.
Estimated Total in Boston
$39,879
Based on 200 sq ft at mid quality, adjusted for Boston market rates.
Local Cost Breakdown
At Boston's average rate of $53.91/hr (80% above national avg)
Material cost index 143 (43% above national baseline of 100)
Three-Season Room Addition vs. Home Value in Boston
| Metric | Boston | National Avg |
|---|---|---|
| Three-Season Room Addition (Mid-Range) | $39,879 | $25,000 |
| Median Home Price | $512,971 | $350,000 |
| Project as % of Home Value | 7.8% | 7.1% |
| Estimated ROI | 50% | 50% |
| Median Household Income | $92,000 | $75,000 |
What Affects the Price in Boston
- 1Local labor rates ($53.91/hr in Boston)
- 2Material cost index (143 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 Boston, MA
Second Story Addition
$322,700
Accessory Dwelling Unit (ADU) Construction
$242,025
Room Addition
$145,215
Swimming Pool Installation
$102,492
Home Addition
$127,612
Inground Swimming Pool
$101,299
Attic Conversion
$89,752
Swimming Pool Construction
$81,593
Three-Season Room Addition in Other Massachusetts Cities
Planning a Three-Season Room Addition in Boston
Building permits are typically required for a three-season room addition in Boston. The average permit fee in this area is $3,166, 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 Boston, skilled contractors charge an average of $53.91/hr, and the specialized nature of this work means cutting corners on labor can lead to costly rework.
With a median household income of $92,000, many Boston residents can budget for this project through savings. The mid-range cost of $39,879 represents 43% 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.
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