Half of Bridgewater’s houses were built as summer places, and the town treats turning one into a year-round home as a permit event with a septic plan attached. Most of the excavation we do here is that conversion: a real frost-depth foundation under a camp on Whittemore Point or Shore Drive, on a lot the current zoning would never approve, with the neighbors closer than the setback. Tight work. We’re set up for it.
The 2000 census counted 850 housing units in Bridgewater and called 420 of them vacant seasonal. Half the town, built for July. The year-round population is one of the smallest in the Lakes Region, and it’s older — median age was 45 back then — which means a lot of the calls we get are somebody retiring to the camp their parents bought. Bridgewater regulates that conversion. Seasonal use means six months or less in a year, and going past that takes a building permit, an inspection of the water supply and septic, and a septic plan certified by a licensed designer as meeting current state rules. The energy code and the life-safety code come along too. The town’s own master plan says the reason is septic: old, undersized systems on small lakefront lots.
Those lots are the second thing. Whittemore Point and the two Shore Drives are the densest housing in town, platted decades before the Lake District went to two acres and 150 feet of frontage. Half-acre waterfront lots are normal there. Today’s ordinance wants 35 feet from the road, 20 from the side lines, and 50 from the lake, and plenty of existing camps don’t meet any of those, so foundation work happens inside the footprint that’s already there. A mini excavator, a conveyor, spoil out the same day. No room to stockpile.
Two pieces of ground in town need a harder look before we dig. The building inspector flags Pasquaney Bay from Sandy Beach down to Timberloch as historically flood-prone, and the same for River Road from Hammond Hill south to Able Road. New construction there has to sit above the FEMA elevations or you won’t get flood insurance, which changes the foundation from the first shovel. And up in the Mountain District the Planning Board can ask for a test pit before a subdivision is approved, because the five-acre minimum has to include 30,000 contiguous square feet that pass state septic standards. We dig those pits. Sometimes the answer is that the buildable spot isn’t where the view is.
The far side of the ridge, River Road, sits on the town’s major aquifer — stratified sand and gravel that digs like a dream and drains fast, which is exactly why the town won’t let you take gravel out within 250 feet of the river. Easy ground, strict rules. That’s Bridgewater in one sentence.
Before you buy a Bridgewater camp to convert, ask for the septic file. If the system was never designed to current rules, the conversion permit will require a new one, and that leach field has to fit on the same small lot as the house.
We start with the paper. Dig Safe gets called, and on a conversion we want the septic design in hand before we dig anything, because where the new system goes decides where the spoil can’t. On a lakefront lot inside 250 feet the erosion plan has to follow the state’s terrain-alteration rules, and the town says so in its own ordinance. Silt fence, stabilized entrance, straw wattles at the lake edge. It goes in first.
Then the camp comes up or the addition gets laid out, and we dig. Four feet plus for frost here, deeper where the footing lands on fill from the 1950s that somebody dumped to level the yard — common on the point. We dig to native, and if native turns out to be ledge on the hillside lots above 3A, that’s a hammer day we priced from the test pit. Frost walls formed, drainage stone and perimeter pipe to daylight, and on the small lots that daylight is sometimes a dry well because there’s nowhere to run pipe that isn’t the neighbor’s.
Backfill with clean gravel, compacted in lifts. Grade away from the building. Loam back on. On a River Road lot we build the finish grade to keep the first floor above the flood elevation the inspector will ask about, because that number comes up at the certificate of occupancy whether anybody planned for it or not.
Foundation excavation for a Bridgewater conversion or new build runs $3,000–$10,000 for a typical house, more where a camp has to come up first or the lot is too tight for a full-size machine. Machine and operator on hourly work is $110–$200/hour. Test pits, frost depth, and access all get settled in the walk-through, and the quote is flat.
A building permit for a seasonal conversion, which triggers an inspection of the building, water supply, and septic. You’ll need a septic plan certified by a licensed designer as meeting current state standards, plus energy-code and life-safety sign-offs. The excavation for the foundation and any new leach field is our part; the design comes first.
Usually. We run compact excavators for exactly these lots and haul spoil the same day because there’s no room to stockpile. What we can’t do is move a setback: 35 feet from the road, 20 from the side lines, 50 from the lake. Existing camps that don’t meet those get worked inside their footprint, or the zoning board gets a variance application.
The town names two areas: Pasquaney Bay from Sandy Beach to Timberloch, and River Road from Hammond Hill south to Able Road. FEMA maps cover the rest. In those zones new construction has to sit above the mapped elevation to be insurable, which usually means a taller foundation and more fill. We check the map before quoting so the number is right.
In the Mountain District, yes, they can. A five-acre lot there has to contain 30,000 contiguous square feet meeting state septic standards, with no slopes over 30 percent counted. A test pit proves it. We dig them with a designer present so the log is usable, and it doubles as our look at ledge and water for the foundation.
Sand and gravel, mostly — the town’s main aquifer runs along the Pemigewasset there. It digs easy and drains fast. The catch is the town’s shoreline section: no gravel excavation or processing within 250 feet of the river, and erosion control to the state handbook. Good ground, watched closely.
Free site walks, test pits before quotes, flat pricing, and a crew that knows Lakes Region ground.
Tell us where the property is and what you’re trying to do. We’ll walk the site, talk it through, and give you a straight, flat quote.
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