Buyers come up from Concord, fifteen minutes north on 93, and a lot of them are looking at the first house they’ve ever considered that isn’t on city water and sewer. This is where the inspection earns its fee.
Canterbury sits right on Concord’s north line, and its two Interstate exits make it about the easiest commute in the county. So the buyer pool skews toward people used to a water bill and a sewer bill. In Canterbury there is neither, on any lot. The house comes with a well, and it comes with a septic system, and the seller’s disclosure form may say “no known problems” in the handwriting of someone who hasn’t opened the tank in twenty years.
What they’re usually buying is old. The town capped new building permits in the late 1970s and has never bumped up against the cap, so the majority of houses that turn over here are pre-1980 — farmhouses in the Center and on the hill roads, the houses of the Sherwood Forest development, a few places near the exits. Systems of that age can be perfectly good. They can also be a steel tank, a stone cesspool, or a field that was undersized the day it went in and has been quietly limping along under a two-person household. You cannot tell which from the driveway.
There’s a river angle too. The Merrimack is the whole western boundary of town, and the state’s protected shoreland runs 250 feet back from it. Sell a developed lot in that band and RSA 485-A:39 requires a septic site assessment before closing. New work within a quarter mile of the river also gets reviewed by the Upper Merrimack River Local Advisory Committee. It doesn’t come up on many sales in Canterbury — but when it does, it’s a surprise to everyone at the table, and it shouldn’t be.
If you’re listing a Canterbury house, have the tank pumped and inspected before the photographer shows up. A clean report in the disclosure packet ends the septic conversation before a buyer’s agent can start it.
We pump the tank first, because a tank full of liquid hides every crack, every rotted baffle, and every sign of what’s been going to the field. Then we look: tank material and condition, both baffles, the inlet, the outlet, water level against the outlet invert (a high level means the field is pushing back). We find and open the distribution box. We probe the field for saturation and check for surfacing. We run water from the house and watch where it goes.
We also locate the well relative to the tank and the field and note the separation. On old lots that setback wasn’t always respected, and a buyer should know if their drinking water is fifty feet downhill from their leach field before they own it.
You get a written report with photos inside 48 hours, and it says what we found in plain language: sound, needs a specific repair, or done. If a bedroom count on the listing doesn’t match what the system was designed for — common where an ADU or a finished attic got added — we say that too, because the state sizes a system to bedrooms, not to how many people happen to live there.
For Merrimack frontage we handle the RSA 485-A:39 site assessment as its own document. Build it into your listing schedule and it’s a formality. Discover it two weeks before closing and it’s a delay.
A full pump-and-inspect evaluation runs $400–$700, pumping included. Shoreland site assessments for river-frontage lots are quoted per property. We’ll schedule around showings and closing dates — agents call us direct and we work it out.
That was, on a lot of Canterbury houses, decades ago. It isn’t a report, it’s a memory. The tank has to be pumped and opened to say anything real about it, and the field has to be probed. That’s a morning’s work and it’s the cheapest thing in the whole transaction.
It’s about the river. If the developed part of your lot is within 250 feet of the Merrimack, yes — a septic site assessment is required at sale under RSA 485-A:39. Most of Canterbury is well inland of that. The lots off Exit 17 toward the river and along the west side are the ones to check.
Then the buyer is buying a three-bedroom system with a four-bedroom load, and the lender or the buyer’s attorney may care a great deal. We note the discrepancy in the report. Sometimes the fix is an upgrade; sometimes it’s honesty in the listing. Either way it’s better known now.
Yes, and in Canterbury we often do. No design on file is normal for anything pre-1970s. We locate the tank by probing, find the box, and map what’s there. You’ll get a sketch with the report so the next owner isn’t starting from zero.
Then you know before you own it, and the price conversation happens with a real number instead of a guess. A failed field on Canterbury hill ground is a serious number, which is exactly why you want it before closing and not after.
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