Three-Season Room Addition in Cambridge, MA — Costs $12,853 to $104,432
What does three-season room addition cost in Cambridge? Average $40,166, ranging $12,853–$104,432. Labor runs $54.31/hr locally — 61% above the national average. Free breakdown with material + labor split.
Cambridge, MA Market
+61% vs nationalLabor Rate
$54.31/hr
Material Index
144
Avg Permit Cost
$3,017
Median Home Price
$607,888
Cambridge is a mid-sized city in Massachusetts 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 61% above the national average, Cambridge 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 $607,888, this three-season room addition represents just 6.6% of typical home value — a relatively small investment that can significantly boost curb appeal or functionality.
Low Estimate
$12,853
National: $8,000
Mid-Range
$40,166
National: $25,000
High End
$104,432
National: $65,000
Per Sq Ft
$153
National: $95
Three-Season Room Addition Cost Calculator for Cambridge
Adjusted for Cambridge's labor rate ($54.31/hr) and material costs (index 144).
Mid-grade materials, good quality fixtures, standard options.
Estimated Total in Cambridge
$40,166
Based on 200 sq ft at mid quality, adjusted for Cambridge market rates.
Local Cost Breakdown
At Cambridge's average rate of $54.31/hr (81% above national avg)
Material cost index 144 (44% above national baseline of 100)
Three-Season Room Addition vs. Home Value in Cambridge
| Metric | Cambridge | National Avg |
|---|---|---|
| Three-Season Room Addition (Mid-Range) | $40,166 | $25,000 |
| Median Home Price | $607,888 | $350,000 |
| Project as % of Home Value | 6.6% | 7.1% |
| Estimated ROI | 50% | 50% |
| Median Household Income | $98,948 | $75,000 |
What Affects the Price in Cambridge
- 1Local labor rates ($54.31/hr in Cambridge)
- 2Material cost index (144 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 Cambridge, MA
Second Story Addition
$325,033
Accessory Dwelling Unit (ADU) Construction
$243,775
Room Addition
$146,265
Swimming Pool Installation
$103,229
Home Addition
$128,532
Inground Swimming Pool
$102,025
Attic Conversion
$90,403
Swimming Pool Construction
$82,184
Three-Season Room Addition in Other Massachusetts Cities
Planning a Three-Season Room Addition in Cambridge
Building permits are typically required for a three-season room addition in Cambridge. The average permit fee in this area is $3,017, 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 Cambridge, skilled contractors charge an average of $54.31/hr, and the specialized nature of this work means cutting corners on labor can lead to costly rework.
With a median household income of $98,948, many Cambridge residents can budget for this project through savings. The mid-range cost of $40,166 represents 41% 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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