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Top Prefab ADU Builders
By number of ADU models listed on Structofy, the top builders are Champion Homes, Studio Shed and DC Structures. Across 125 ADU listings from 35 builders, the median listed price is $170,950 for a median 832 sq ft.
Last updated November 2, 2026 · computed automatically from 1,645 Structofy listings.
Top Prefab ADU Builders on Structofy
| # | Builder | Models | Priced | Lowest price | Median price | Median sq ft | Median $/sq ft |
|---|---|---|---|---|---|---|---|
| 1 | Champion Homes Auburn Hills, MI | 24 | 0 | — | — | 995 | — |
| 2 | Studio Shed Louisville, CO | 14 | 14 | $92,173 | $134,672 | 578 | $236 |
| 3 | DC Structures Pennsylvania | 10 | 10 | $21,908 | $96,360 | 979 | $101 |
| 4 | Avrame USA | 9 | 0 | — | — | 586 | — |
| 5 | Ideabox Hood River, OR | 7 | 7 | $190,000 | $262,000 | 781 | $335 |
| 6 | Abodu Redwood City, CA | 6 | 6 | $234,800 | $311,300 | 713 | $441 |
| 7 | Den Outdoors Seattle, WA | 5 | 5 | $154,750 | $160,964 | 1,000 | $183 |
| 8 | Method Homes Seattle, WA | 5 | 5 | $203,360 | $295,000 | 960 | $310 |
| 9 | Lindal Cedar Homes Seattle, WA | 4 | 0 | — | — | 850 | — |
| 10 | eLoghomes | 3 | 1 | $185,000 | $185,000 | 900 | $206 |
| 11 | Blu Homes Vallejo, CA | 3 | 1 | $250,000 | $250,000 | 1,003 | $250 |
| 12 | Wausau Homes Wausau, WI | 3 | 0 | — | — | 1,123 | — |
| 13 | Modular Direct | 2 | 2 | $112,000 | $121,450 | 1,010 | $121 |
| 14 | S2A Modular Boston, MA | 2 | 2 | $159,000 | $159,000 | 800 | $199 |
| 15 | Wheelhaus | 2 | 2 | $195,000 | $195,000 | 400 | $488 |
ADUs here are listings of 250–1,200 sq ft that are not tiny houses, barns, commercial buildings or HUD-code manufactured homes, plus any listing the builder calls an ADU. Builders need at least 2 qualifying models to be ranked; 21 qualify.
Example models
- Abodu One by Abodu, from $260,800
- SmartCabin Z1 by Alchemy Architects, from $165,000
- Origin 1000 by Blu Homes, from $250,000
- Connect 1 by Connect Homes, from $274,800
- The Bungalow by Country Carpenters, from $140,000
- Bandon Cabin Kit by DC Structures, from $120,455
How to choose a builder
Start with your city's ADU rules: maximum size, height, setbacks and whether the unit can be rented. Then shortlist builders that deliver to your area and have plans that fit those limits.
Compare what each quote includes: permits, foundation, utility trenching and crane set can be a large share of the total. See how much a backyard ADU costs.
How we ranked
- Ranked by the number of ADU models each builder lists on Structofy, an objective measure of how much choice they offer. Ties go to the lower median listed price, then alphabetical order.
- We do not use star ratings or reviews, and no builder paid to be listed or ranked.
- ADUs here are listings of 250–1,200 sq ft that are not tiny houses, barns, commercial buildings or HUD-code manufactured homes, plus any listing the builder calls an ADU.
- Source: every listing in the Structofy directory at the moment this page loads. Nothing on this page is paid placement, and we do not rate or review builders; rankings use only the numbers shown.
- Prices are builders' listed starting prices for the home itself. Listings that say "contact for price" (or show a placeholder under $1,000) are left out of price figures. Land, foundation, delivery, setup and permits are not included.
- Price per square foot uses only listings that show both a price and a size of at least 80 sq ft.
Related pages
- Prefab Home Price Report 2026Median prices by type, size and bedrooms.
- Cheapest prefab homesLowest listed prices under $100k and $200k.
- Prefab builders by number of modelsEvery builder ranked by listings.
- Top tiny house buildersRanked by models listed and price.
- Best-value modular homes under $200kRanked by price per sq ft.
- Best-value barn kits and barn homesRanked by price per sq ft.
- Prefab homes hubAll home types in one place.
- Modular homes hubPrices, builders and models.
- Tiny houses hubPrices, sizes and builders.
- Prefab ADUs hubBackyard homes and builders.
- Barn homes hubBarn homes and kits.
- How much does a prefab home cost?Plain-English cost guide.
- Costs beyond the priceLand, foundation, delivery, permits.
- All guidesEvery Structofy guide.
Questions
Who are the top prefab ADU builders?
Ranked by number of models listed on Structofy: Champion Homes, Studio Shed and DC Structures. Open each builder page to compare designs and prices.
How much do ADUs cost from these builders?
The median listed price is $170,950 across 68 priced listings, ranging from $21,908 to $500,000.
Do prefab ADU builders handle permits?
Some do and some do not. Ask each builder whether permits, plans and site work are in their price or billed separately.