ADU builder, septic, and site work for Conway, North Conway, and the Mount Washington Valley. Based 55 minutes away in West Newfield, Maine, Langone Site Services delivers turn-key ADU builds, custom homes, excavation, and septic systems across Carroll County.
Conway anchors the Mount Washington Valley — North Conway's outlet corridor, the Saco River, Cranmore and Attitash, and the gateway to Crawford Notch. It's one of northern New England's strongest year-round tourism economies, and one of its tightest housing markets: the workforce that runs the valley increasingly can't find anywhere in it to live.
Conway carries the best of both ADU markets. Short-term demand runs nearly year-round — ski season, summer hiking, and fall foliage — while long-term workforce rentals stay in permanent shortage, with a detached one-bed typically renting $1,400-$1,800/month. Under HB 577 a detached unit is now allowed by right, which opened up thousands of valley lots that were previously blocked.
Valley lots mean glacial soils, river-plain water tables, ledge on the hillsides, and serious snow-load and frost considerations. We install septic systems sized for four-season occupancy, cut and armor driveways that survive mud season and plowing, handle Saco River shoreland erosion control, and do full site packages for new homes — with our own fleet, so a 55-minute haul doesn't become a scheduling excuse.
Under NH's HB 577 (2025), Conway must allow one ADU — attached or detached — by right wherever single-family homes are permitted, with no special exception or conditional use permit and no size cap below 950 sq ft. A 2026 state law also caps residential parking requirements at one space per unit, removing the parking objection towns once used to block small units. Work within 250 ft of the Saco River and the valley's other protected waters still falls under the NH Shoreland Water Quality Protection Act and NH DES permitting — we hold Maine DEP Erosion and Sediment Control certification and apply the same discipline on every shoreland job.
Check My LotYes. We build turn-key ADUs in Conway from $135,000, with all 7 models priced up front and most builds finished in about 8 weeks. Conway carries the best of both ADU markets. Short-term demand runs nearly year-round — ski season, summer hiking, and fall foliage — while long-term workforce rentals stay in permanent shortage, with a detached one-bed typically renting $1,400-$1,800/month. Under HB 577 a detached unit is now allowed by right, which opened up thousands of valley lots that were previously blocked.
Under NH's HB 577 (2025), Conway must allow one ADU — attached or detached — by right wherever single-family homes are permitted, with no special exception or conditional use permit and no size cap below 950 sq ft. A 2026 state law also caps residential parking requirements at one space per unit, removing the parking objection towns once used to block small units. Work within 250 ft of the Saco River and the valley's other protected waters still falls under the NH Shoreland Water Quality Protection Act and NH DES permitting — we hold Maine DEP Erosion and Sediment Control certification and apply the same discipline on every shoreland job.
Valley lots mean glacial soils, river-plain water tables, ledge on the hillsides, and serious snow-load and frost considerations. We install septic systems sized for four-season occupancy, cut and armor driveways that survive mud season and plowing, handle Saco River shoreland erosion control, and do full site packages for new homes — with our own fleet, so a 55-minute haul doesn't become a scheduling excuse.
Conway is about 55 minutes from our West Newfield, Maine shop, so it's well within our core service area — meaning fast site visits and no long-haul mobilization charges. Call (978) 987-0089 or use our free instant pricing tool to get started.
Full service area includes 45+ towns within 30 miles of West Newfield, ME. See the full service area map.
More permitting, pricing, and rental answers in the blog — All guides.
Free consultation, real pricing, permitting handled. Recent work: four-season septic systems and site work across the Mount Washington Valley.
Or email dylan@langonesiteservices.com