Decker Building Co
47Fair3.7(15)
(This is currently the Decker Building Company office and model)
(734) 847-0667Room Addition Cost in Lambertville, MI (2026)
How much does room addition cost in Lambertville? Typical 2026 prices, cost by home size, and 3 local general contractors to compare.
Typical room addition cost in Lambertville
$30,000 – $90,000
per project, installed · 2026 Ohio pricing
Estimate your general contractor project in Lambertville
Based on 2026 pricing for Lambertville, MI and the surrounding area.
Your estimate
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A planning range, not a quote. Get written estimates from licensed, insured pros.
Who does this work in Lambertville
Homeowners in Lambertville can compare 3 general contractors here. Together they hold 18 public reviews and average 4.3 stars, a little below the 4.5 stars we see across 85 general contractors region-wide.
In Lambertville, Decker Building Co has the most reviews (15).
2 of 3 have their own website; 2 have fewer than five reviews, so ask those for references.
Not finding the right fit? Nearby: Temperance (3 mi, 1 general contractor), Ottawa Lake (4 mi, 1 general contractor), Sylvania (5 mi, 4 general contractors), Toledo (10 mi, 22 general contractors).
All general contractor prices and what drives them →
Top general contractors in Lambertville
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Stock photoBased in Lambertville, J D Construction provides construction services.
(734) 856-6682
The Locating Company LLC is a construction business based in Lambertville, MI, rated 5.0 stars by 3 reviewers.
(419) 486-9124Room Addition cost in Lambertville: FAQ
How much does room addition cost in Lambertville?
Most Lambertville homeowners pay about $30,000 to $90,000 per project for room addition. The size of the job, materials, access and the time of year drive the final price.
How many general contractors serve Lambertville?
We list 3 general contractors in Lambertville, MI, with an average rating of 4.3 stars across 18 reviews.
Room Addition cost in nearby cities
Sources: HomeAdvisor / Angi cost guides, Fixr cost guides, NerdWallet home improvement costs, adjusted for Ohio and the Midwest; last reviewed October 2026. These are planning ranges, not quotes.