How much does a sunroom addition cost in Renton, WA?

The average sunroom addition in Renton, WA costs $54,048 in 2026. Costs range from $20,268 for a basic project to $135,120 for a high-end renovation. Renton is 35% more expensive than the national average of $40,000.

What is the labor rate for contractors in Renton?

The average contractor labor rate in Renton, WA is $44.98/hour, compared to the national average of $30/hour. For a sunroom addition, labor typically accounts for 45% of the total cost, which is approximately $24,322 in Renton.

Are materials more expensive in Renton?

Renton has a material cost index of 123 (national average = 100). Materials cost about 23% more than the national average. For a sunroom addition, materials account for 55% of the cost, approximately $29,726.

Do I need a permit for a sunroom addition in Renton?

Yes, a sunroom addition typically requires building permits in Renton, WA. The average permit cost in Renton is $1,646. Always confirm requirements with the Renton building department before starting work.

Is a sunroom addition a good investment in Renton?

A sunroom addition provides an estimated 48% ROI nationally. In Renton, where the median home price is $560,000, this project costs about 9.7% of your home value. This is a moderate investment relative to home value — focus on features that appeal to buyers in the local market.

Sunroom Addition in Renton, WA — Costs $20,268 to $135,120

What does sunroom addition cost in Renton? Average $54,048, ranging $20,268–$135,120. Labor runs $44.98/hr locally — 35% above the national average. Free breakdown with material + labor split.

Renton, WA Market

+35% vs national

Labor 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 sunroom 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 sunroom addition represents just 9.7% of typical home value — a relatively small investment that can significantly boost curb appeal or functionality.

Low Estimate

$20,268

National: $15,000

Mid-Range

$54,048

National: $40,000

High End

$135,120

National: $100,000

Per Sq Ft

$176

National: $130

Duration: 2-6 weeks

DIY: Hard

Permits: Required

ROI: 48%

Sunroom Addition Cost Calculator for Renton

Adjusted for Renton's labor rate ($44.98/hr) and material costs (index 123).

Project Size: 200 sq ft

50 sq ft1,000 sq ft

Quality Level

Mid-grade materials, good quality fixtures, standard options.

Estimated Total in Renton

$54,048

Based on 200 sq ft at mid quality, adjusted for Renton market rates.

Local Cost Breakdown

Labor (45%)$24,322

At Renton's average rate of $44.98/hr (50% above national avg)

Materials (55%)$29,726

Material cost index 123 (23% above national baseline of 100)

Sunroom Addition vs. Home Value in Renton

Metric	Renton	National Avg
Sunroom Addition (Mid-Range)	$54,048	$40,000
Median Home Price	$560,000	$350,000
Project as % of Home Value	9.7%	11.4%
Estimated ROI	48%	48%
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)
3Size and style (3-season vs 4-season)
4Foundation type
5Insulation (4-season)
6HVAC connection

Popular Upgrades

Four-season insulated sunroom
Heated floors
Retractable shading

Other Projects in Renton, WA

Second Story Addition

$272,933

HardROI 60%

Accessory Dwelling Unit (ADU) Construction

$204,700

HardROI 80%

Room Addition

$122,820

HardROI 55%

Swimming Pool Installation

$86,953

HardROI 40%

Home Addition

$108,096

MediumROI 60%

Inground Swimming Pool

$86,077

HardROI 43%

Attic Conversion

$75,797

HardROI 64%

Swimming Pool Construction

$68,907

Professional OnlyROI 43%

Sunroom Addition in Other Washington Cities

Seattle, WA

$60,318

+12%Pop. 737,015

Spokane, WA

$54,842

+1%Pop. 228,989

Tacoma, WA

$47,872

-11%Pop. 219,346

Vancouver, WA

$50,464

-7%Pop. 190,915

Bellevue, WA

$59,284

+10%Pop. 151,854

Kent, WA

$47,722

-12%Pop. 136,588

Everett, WA

$52,218

-3%Pop. 110,629

Spokane Valley, WA

$54,072

SamePop. 103,597

Planning a Sunroom Addition in Renton

Building permits are typically required for a sunroom 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 2-6 weeks from start to finish.

A sunroom 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 $54,048 represents a significant investment. Consider financing options or phasing the work to spread costs over time.

Sunroom Addition — National Guide

See the full national cost guide with DIY tips, cost factors, and ROI analysis.

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