Do you build ADUs in Ossipee?

Yes. Langone Site Services builds turn-key ADUs in Ossipee, New Hampshire. The yard is 25 minutes away in West Newfield, Maine. 10 published models $155,000–$408,000.

Do you self-perform excavation and septic?

Yes. We own the excavation fleet and self-perform site work and septic. Conventional septic in Maine starts at $18,000. Maine design is $500. Specialty trades (plumbing, electrical) sit under one Langone prime contract.

Do you build custom homes in West Newfield and nearby towns?

Yes. New and custom homes start at $325/sq ft and go up from there. Land is not included. Site work and the house sit under one contract. We do not publish a four-tier price table.

Serving Ossipee

ADU Builder & Excavation Contractor in Ossipee, New Hampshire

Route 16 and lake-country builds from the same West Newfield crew. Based 25 minutes away in West Newfield, Maine. Turn-key ADUs, custom homes starting at $325/sq ft, excavation, and septic across Carroll County.

Excavation, septic installation, and site work in Ossipee. We own the fleet. Excavation contractor Maine. Septic installation Maine. Site work contractor, southern Maine.

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25 min from HQ

Carroll County

Maine DEP Erosion Certified

Local Context

Why Ossipee is a strong market for ADU and excavation work.

Ossipee sits between our yard and the bigger lakes. Residential and Rural lots share a 40 / 25 / 25 setback in the town table.

Setbacks

Front, side, and rear in Ossipee.

NH RSA 674:71-73 (HB 577) — one ADU by right on a single-family lot

Ossipee is lakes and Route 16, close enough that the same trucks run it. Residential and Rural share the 40 / 25 / 25 setback in Table 2.

District	Front	Side	Rear	Lot / cover
RES · primary Residential Table 2 and §6.5. Front may drop to the street-line average. Frontage 200 ft.	40 ft	25 ft	25 ft	44,000 sf · 25% impervious
RUR Rural	40 ft	25 ft	25 ft	43,560 sf · 25% impervious
V Village Frontage 80 ft.	10 ft	15 ft	15 ft	10,000 sf · 50% impervious

ADU setbacks match Table 2 for the district.
The Ossipee model (1,049 sf + garage) needs a town that allows that size. We check Ossipee’s cap on the consult, we do not assume it.

Verified 2026-07-07 against Ossipee zoning ordinance, Table 2 — Dimensional Requirements; §6.5. Towns amend ordinances. Confirm with the land-use office before you build. Official source

ADU Construction

ADU Builder in Ossipee

Most published models fit under a 950 sf detached cap. The Ossipee model itself is 1,049 sf with a garage — we only bid that size if the town allows it on your lot. 10 published models $155,000–$408,000 on a standard site. See the ADU models.

See the 10 ADU models Price My ADU

Excavation & Site Work

Excavation Contractor in Ossipee

Septic, driveway, and pad work are the usual tickets. Short enough from the yard that mobilization is not a speech.

All Site Services Free Site Review

Excavation contractor Maine Septic installation Maine Site work contractor, southern Maine

Septic installation in Ossipee

Septic installer York County and nearby NH. Maine design is $500. Conventional work starts at $18,000.

Septic installation Maine

Excavation contractor in Ossipee

Excavation contractor southern Maine and the NH Lakes / Seacoast. Land clearing and site prep. We own the fleet. Maine DEP Erosion Control Certified.

Excavation contractor Maine

Site work in Ossipee

Crewed and equipped in-house. Land clearing and site prep. We own the fleet. Driveways, foundations and drainage, utility trenching, and municipal and road work.

Site work contractor, southern Maine

Zoning & Permitting

What Ossipee actually allows.

Residential setbacks are 40 ft front, 25 ft side, 25 ft rear. Village is 10 / 15 / 15. Confirm the district on the map.

Check My Lot

Also Serving

Neighboring towns we build in.

WakefieldEffinghamFreedomTamworth

Full service area is about an hour from West Newfield, ME. See the full service area map.

Sanford, ME Kennebunk, ME Wells, ME Waterboro, ME Rochester, NH Dover, NH Wakefield, NH Wolfeboro, NH Durham, NH Newfield, ME Alton, NH Laconia, NH

FAQ

Building in Ossipee.

Do you build ADUs in Ossipee?: Yes. Langone Site Services builds turn-key ADUs in Ossipee, New Hampshire. The yard is 25 minutes away in West Newfield, Maine. 10 published models $155,000–$408,000.
Do you self-perform excavation and septic?: Yes. We own the excavation fleet and self-perform site work and septic. Conventional septic in Maine starts at $18,000. Maine design is $500. Specialty trades (plumbing, electrical) sit under one Langone prime contract.
Do you build custom homes in West Newfield and nearby towns?: Yes. New and custom homes start at $325/sq ft and go up from there. Land is not included. Site work and the house sit under one contract. We do not publish a four-tier price table.

Start your project

Ready to build in Ossipee?

Free consultation, real pricing, permitting handled. Recent work: site prep along the Ossipee corridor.

Book Free Consult (978) 987-0089

Or email dylan@langonesiteservices.com