Every month or two I get a phone call that starts the same way: someone closed on a beautiful ten-acre lot in Alexandria or Danbury, walked it in the summer, fell in love with it, signed the papers — and now they want to know what it's going to cost to build a driveway to it.
Sometimes the answer is reasonable. Sometimes the answer is more than the land cost. The difference is almost never obvious to someone standing on a pretty piece of property in June. But it's obvious to someone who digs holes for a living, in about thirty minutes, with a pair of boots and a shovel.
If you're looking at raw land in central NH, this is what an excavator is looking at when we walk a lot — and what I'd want a buyer to think about before they put in an offer, not after.
1. Access — can a truck actually get in?
The first thing I look for isn't on the lot. It's the road the lot meets. How wide is it? What's the grade coming in? Is there a sharp corner at the entrance? Is there a culvert or ditch between the road and your future driveway?
A buildable driveway needs to handle concrete trucks, fuel deliveries, an ambulance if it ever comes to that, and your own daily use in mud season. Getting a 9-ton truck up a 15-percent grade in April is not the same problem as getting a sedan up it in July. And if the road frontage sits lower than the road itself, you're looking at a new culvert, a headwall, and possibly a driveway permit from the town or the state — anywhere from $2,000 to $8,000 before the driveway itself even starts.
2. Perc test — will a septic system work?
No perc, no house. In most of rural NH you're on a private septic system, not town sewer, and every system needs soil that drains correctly. A percolation test (perc test) measures how fast water absorbs into the ground at your proposed leach field location. If the soil is too clayey, too shallow over ledge, or too wet, the test fails.
A failed perc isn't always the end of the road — engineered systems and mound systems exist — but they can add $20,000 to $40,000 on top of a conventional install. If a seller can show you a passed perc test on the property, that's a huge piece of information. If they can't, I'd put a contingency in the offer that the land has to perc before closing. It's the single cheapest piece of protection you can give yourself.
3. Slope and drainage — where does the water want to go?
Walk the lot after rain if you possibly can. Or in early spring when the snow is melting. Water tells the truth about a property in ways that dry summer soil doesn't.
I'm looking for: standing water in low spots, soft ground you sink into, obvious erosion channels, and crucially, where all of that water flows to. If the buildable part of the lot is downhill from everything else on the property — or worse, downhill from the neighbor's property — you're going to spend real money on drainage. Foundation drains, curtain drains, perimeter rock beds, possibly a sump. That's not a dealbreaker, but it's a real number to factor in.
“Water tells the truth about a property in ways that dry summer soil doesn't. Walk the lot after rain if you possibly can.”
4. Ledge — the NH-specific killer
This is the one that catches buyers most. New Hampshire is built on bedrock, and in a lot of places that bedrock is closer to the surface than anyone realizes. Hit ledge when you're digging a foundation or a septic trench, and you're either blasting it, hammering it out with a breaker, or redesigning around it — all expensive.
Signs of shallow ledge on a lot walk: visible rock outcrops, shallow-rooted trees (trees that blow down easily in storms often indicate thin soil), thin or absent topsoil on slopes, and any area where the natural contour suddenly changes from a smooth slope to a flat step. None of these are guarantees, but together they tell you whether to worry. If I see three or four of those signs on one lot, I'd want test pits dug before closing.
5. Setbacks and wetlands
NH has a Shoreland Water Quality Protection Act that restricts what you can do within 250 feet of any “public water” — most ponds, lakes, and larger streams. A lot with beautiful lake frontage might have most of its buildable area off-limits to clearing or foundation work. Check the state map before you fall in love with the lot.
Wetlands are also surveyed separately. Small seasonal wet spots usually don't show up on town tax maps but do show up when you try to pull a building permit. If any part of the lot stays wet into June, treat it as wetland until proven otherwise.
6. Power and utilities
A buildable lot needs power within reasonable distance. Every pole you add from the road to your house site is a real bill from Eversource or NHEC — usually several thousand dollars per pole once you're past the first one or two. Underground power from the road costs even more but looks better; it's a design choice, not a question of access.
Internet matters too, especially for rural NH. Check coverage on the lot itself, not just in the general area. Starlink has changed the calculus on this, but it's worth confirming before you assume you'll be working from home there.
7. Clearing versus preserving
Finally: what are you actually going to do with the trees? A full clear of a wooded lot runs a lot more than a selective clear, because we have to pull stumps, grind them, and truck off the waste. A selective clear — taking the right trees while protecting the ones you want to keep — costs more per tree but leaves you with a finished-looking property on day one.
If there's a big oak or a mature maple you love, tell whoever clears the land. It's a lot cheaper to protect a tree during clearing than to realize afterward that you accidentally killed it by compacting the soil over its roots.
What a site walk actually costs
Nothing, in my case. I walk prospective lots at no charge for buyers in the Lakes Region, because honestly — if the lot is a good one, I'd rather help you buy it right than get called in later to fix something the previous owner ignored. I'll tell you what I'd worry about, what I wouldn't, and roughly what it would cost to turn the lot into a house site.
Thirty minutes on the property, one honest opinion, before you sign. That's the easiest money you can save on a land purchase.
What we do
I do site evaluations, driveways, foundation prep, septic installs, and drainage for new builds across central NH. If you're looking at a lot and want a straight read on what it'll take to build there, that's exactly the kind of call to make.