Rockingham County · New Hampshire

ADUs and site work in Exeter, NH

The freshwater Exeter River becomes the tidal Squamscott in town. Downtown lots along the river are tighter than lots farther upstream. Langone Site Services builds turn-key ADUs in Exeter and handles excavation, site work, and septic. We don't publish a New Hampshire septic starting price. Call (978) 987-0089.

County
Rockingham CountyCounty
ZIP code
03833ZIP code
Plans shortlisted here
3Plans shortlisted here
Verified district setbacks
On requestVerified district setbacks
Local rules

What Exeter actually allows.

A river lot on the Squamscott can have extra limits. We'll check yours.

The lot in Exeter.

Exeter sits inland from the Atlantic, on the river that turns tidal downtown. Downtown along the river is tighter than a lot farther upstream. HB 577 is the New Hampshire ADU rule.

Setbacks

Setbacks in Exeter.

A downtown Exeter lot on the Squamscott and a lot farther upstream are different setbacks. We'll look up the district.

On the ground

The dirt work behind a Exeter build.

ADUs in Exeter

A downtown Exeter lot usually wants less footprint than a lot upstream on the Squamscott. Open with Newfield (600 sq ft, one floor), Bentley (750 sq ft plus a garage), and Washington (896 sq ft). Ella's Retreat is 981 sq ft and The Ossipee is 1,049 sq ft. Both need a town that allows that size.

Price a Exeter ADU

Excavation in Exeter

The dig in Exeter is older downtown streets and lots along the Squamscott, not a beach road.

Excavation

Septic in Exeter

We'll check whether an Exeter lot near the Squamscott is on town sewer or needs a septic design.

Septic installation

Site work in Exeter

Exeter site work is older streets and lots along the Squamscott. Ask at (978) 987-0089 whether that trip works.

Site work
Nearby

Beyond Exeter.

Every town we cover is listed on the service area page.

Start here

Send us the address in Exeter.

We will read the ordinance against your parcel, look at what the ground will take for septic and access, and come back to you with a figure rather than a range.

Quick quote

Name, and a phone or email so we can reply.

FAQ

Straight answers.

Who builds ADUs in Exeter, NH?
Langone Site Services builds turn-key ADUs in Exeter. A downtown lot usually wants less footprint than a lot upstream on the Squamscott. The Newfield is $196,000 for 600 sq ft on one floor. The Bentley is $278,000 for 750 sq ft with an attached garage. The Washington is $305,000 for 896 sq ft. Larger plans need a town that allows that size.
Do you do excavation in Exeter?
Yes. Excavation and site work in Exeter are regular work, including older downtown streets and lots along the Squamscott. The number is (978) 987-0089.
Do you install septic systems in Exeter?
We'll check whether the lot is on town utilities or needs a septic design. We price the system from the site. No New Hampshire septic start and no flood number are published here.
Do you build custom homes in Exeter?
Yes. Custom homes in Exeter start at $325 per sq ft. Land is extra. A downtown river lot and a lot upstream are different houses, and the site work is part of the same contract.
Are ADUs allowed in Exeter?
Exeter has to allow one ADU by right in single-family districts, and the town must permit a detached unit under HB 577, and it cannot set a maximum below 750 sq ft. The Squamscott can still add limits. We read Exeter's ordinance before we price the footprint.
How do I get a quote in Exeter?
The Exeter form or a call to (978) 987-0089 both work. The office at 621 Wakefield Road, West Newfield, is open 7:00 to 6:00 on weekdays and 8:00 to 2:00 on Saturday.

Thinking about building in Exeter?

Tell us if the lot is downtown on the Squamscott or farther upstream. dylan@langonesiteservices.com