Every model, every price
Most builders make you call to get a number. We publish ours — same table as our models page, updated whenever pricing changes.
| Model | Size | Beds / Baths | All-in price | $ / sf |
|---|---|---|---|---|
| Barrington | 384 sf | 1 bd / 1 ba | $184,000 | $479 |
| Wakefield | 525 sf | 1 bd / 1 ba | $269,000 | $512 |
| Newfield | 600 sf | 1 bd / 1 ba | $244,000 | $407 |
| Summit | 654 sf | 1 bd / 1 ba | $293,000 | $448 |
| Rye | 750 sf | 1 bd / 1 ba | $348,000 | $464 |
| Shapleigh | 800 sf | 2 bd / 1 ba | $313,000 | $391 |
| Spruce | 882 sf | 2 bd / 2 ba | $361,000 | $409 |
| Washington | 896 sf | 2 bd / 1 ba | $380,000 | $424 |
| Ella's Retreat | 981 sf | 2 bd / 2 ba | $401,000 | $409 |
| Ossipee | 1049 sf | 2 bd / 1 ba | $483,000 | $460 |
What “all-in” actually covers
The all-in price includes the base build, the foundation, on-lot utility runs, permits, design, and standard finishes. In other words: the number on the table is the number a normal lot pays to go from grass to keys.
Three things sit outside it, because they genuinely vary by property: town water/sewer tap fees (set by each town, not by us), major site surprises (ledge removal, a septic redesign), and a travel allowance beyond roughly an hour from our Madbury base. Every one of them is written into your quote before you sign — that's the point of all-in pricing.
Why small ADUs cost more per foot
A 384 sf home and a 1049 sf home both need a foundation, a utility trench, a permit package, and a design set. Those fixed costs get divided by fewer feet on a small unit — which is why our smallest model runs about $479/sf while larger two-beds settle near $391/sf. If you're optimizing pure value per dollar, mid-size models usually win; if you're optimizing total budget, smaller wins. The compare page puts them side by side.
For context: New Hampshire's median single-family sale price hit a record $576,000 in May 2026. A complete new home in the backyard for $184,000–$483,000 — on land you already own — is the cheapest square footage most NH homeowners will ever add.
The law that makes this possible
Since July 1, 2025, NH RSA 674:71-73 (HB 577) allows one ADU by-right on every single-family lot statewide — no special permits or discretionary hearings for a compliant unit, with detached ADUs up to 950 sf. Your ADU's setbacks are the same as your house's. Read the plain-English breakdown →