Buying land is the first big step toward building a custom home — and it’s where some of the most expensive mistakes happen. A beautiful lot at a great price can turn into a money pit if it can’t get a septic permit, sits in a flood zone, or has no legal road access.

Here’s what to check before you buy land to build on.

1. Decide What You Need From the Land

Before you start shopping, write down what matters most:

How much land? A quarter-acre lot near town, or 10+ acres in the country?
Commute and location: distance to work, schools, family, and shopping.
What you want to build: a large single-story home or a home with a big shop needs a bigger, flatter building area.
Future plans: animals, a pool, a guest house, room to expand.

2. Check the Zoning and Restrictions

Zoning rules decide what you can build on a piece of land. Call the county or town planning office (or check their website) and ask:

Is the land zoned for a single-family home?
What’s the minimum home size? Some areas require homes to be at least a certain square footage.
What are the setbacks (how far the house must sit from property lines and roads)?
Are there limits on outbuildings, shops, or animals?
Are certain home types, like manufactured homes or metal-sided homes, restricted?

Also ask the seller or title company about deed restrictions and HOA covenants. Some rural subdivisions have rules about home size, materials, and even the look of the house.

3. Confirm Access

Make sure the land has legal access to a public road. If you have to cross someone else’s property to reach your lot, you need a recorded easement — not just a handshake deal with a neighbor. Also check who maintains the road. Private roads may be your responsibility to plow and repair.

4. Figure Out Utilities

This is one of the biggest hidden costs of building on raw land.

Water: Is there public water at the road? If not, you’ll need a well. Ask neighbors how deep their wells are and whether water quality is good.
Sewer or septic: Is there public sewer? If not, you’ll need a septic system — and the land has to pass a percolation (perc) test, which measures how well the soil absorbs water. Land that fails a perc test may not be buildable at all. Make your purchase contingent on passing one.
Electric: How far is the nearest power line? Running power down a long driveway can be expensive.
Internet: Don’t assume. Check providers for that address, especially in rural areas.
Gas: Natural gas is often unavailable outside of town; propane is the usual alternative.

5. Check for Flood Risk and Other Hazards

Flood zone: Look up the lot on FEMA’s Flood Map Service Center. Building in a flood zone can raise construction costs and require expensive flood insurance.
Wetlands: Wetlands can sharply limit where you can build.
Slope and soil: Steep land costs more to build on. In some areas, expansive clay soils or rock just below the surface can drive up foundation costs. A soil test (often done by a geotechnical engineer) tells you what you’re dealing with.
Wildfire risk: In fire-prone areas, building codes and insurance can be more demanding.

6. Get a Survey

A land survey shows the exact property lines, easements, and any encroachments (like a neighbor’s fence on your land). Many lenders require one. Don’t rely on old fence lines or the seller’s description of where the property ends.

7. Understand How You’ll Pay for It

Financing raw land is different from financing a house:

Cash is common for land purchases, especially lower-priced rural land.
Land loans usually require larger down payments and come with higher rates and shorter terms than a home mortgage. Local banks, credit unions, and farm credit lenders are often the best sources.
One-time close construction loans can sometimes include the land purchase, so you finance the land and the house together in one loan.
Seller financing is sometimes available, especially on rural land.

If you already own your land when you apply for a construction loan, your land equity can often count toward your down payment.

8. Protect Yourself in the Contract

Before you sign a purchase agreement, make it contingent on (meaning you can back out if it fails):

A passing perc test (if you’ll need septic).
A satisfactory survey.
Zoning that allows your intended home.
Clear title, backed by title insurance.
Financing approval, if you’re borrowing.

Give yourself enough time — often 30 to 60 days or more — to complete these checks.

9. Match Your Plan to Your Land

The best house plan is one that fits your land. Before you fall in love with a plan, consider:

Width and depth of the buildable area after setbacks.
Which way the lot faces — for views, sunlight, and energy efficiency.
Slope — a sloped lot can be great for a walkout basement; a flat lot suits a slab-on-grade ranch or barndominium-style home.
Where the well, septic field, and driveway will go. These take up more room than most people expect.

Land Buying Checklist

Zoning allows a single-family home of the size you want
No deed restrictions or HOA rules that conflict with your plans
Legal road access, with recorded easements if needed
Water: public water available or well feasible
Sewer: public sewer available or passing perc test
Electric service nearby
Not in a flood zone or wetland, or you’ve priced the impact
Current survey with clear boundaries
Clear title and title insurance
Financing lined up
A house plan that fits the buildable area

Do your homework on the land, and the rest of your build will go a lot smoother.