Land is usually the second-biggest cost of a new home after construction. In the NAHB 2024 survey the finished lot averaged $91,057, or 13.7% of the average new home's sales price.[1] But the price on the listing is only part of what a lot costs you. Slope, soil, utilities, access and local rules decide how much you will spend before the foundation is poured, and some of them can make a cheap lot the most expensive option on your shortlist.
Here are twelve checks to run before you sign, grouped into rules, site conditions and services. Most cost little or nothing to do, and the expensive ones can usually be made a condition of the purchase.
Key takeaways
- Confirm zoning, setbacks, lot coverage and any HOA rules allow the house you want before you make an offer.
- Check what the site needs: survey, soil and slope, flood zone, trees and drainage all change the site-work bill.
- Find out where water, sewer, power and gas are, and what it costs to connect or replace them with a well and septic.
- Write your key checks into the purchase contract as contingencies with enough time to complete them.
Checks 1–4: what the rules allow
1. Zoning
Ask the local planning or zoning office what the parcel is zoned for and confirm a single-family house is allowed. Ask too about any overlay districts, such as historic, environmental or airport zones, that add rules. If you want an accessory dwelling or a workshop later, ask whether that is allowed now.
2. Setbacks, height and lot coverage
Setbacks are the minimum distances between the house and the property lines. Together with height limits and maximum lot coverage, they define the box your house must fit in. A narrow or oddly shaped lot can leave a smaller buildable area than you expect. Our calculator checks whether your ground-floor footprint fits a lot coverage limit if you enter the lot size and the percentage from your zoning code.
3. HOA and deed restrictions
Many subdivisions have covenants that control minimum house size, materials, roof pitch, fences, outbuildings and even which builders you can use. Get the full documents from the title company or HOA before you commit, and read the architectural review process and fees.
4. Easements
Utility, drainage and access easements give others the right to use part of your land. You usually cannot build on them. The title report and a survey will show recorded easements.
Checks 5–9: what the ground is like
5. Boundary and topographic survey
A boundary survey confirms where the lines are and whether anything encroaches. A topographic survey maps the ground levels, which tells your designer how much grading the site needs and where water will flow.
6. Soil
Expansive clay, fill, rock close to the surface or a high water table can change the foundation design and price. A geotechnical (soil) report is required in some areas and worth paying for on any lot with warning signs. If you need a septic system, the soil test also decides whether one can be permitted at all; see well and septic for a new house.
7. Slope
Flat lots are cheapest to build on. A sloping lot can be great for a walk-out basement, but expect retaining walls, more excavation and a longer or steeper driveway. Read our guide to choosing between a slab, crawl space or basement.
8. Flood zone and drainage
Look the address up on FEMA's Flood Map Service Center. A lot in a Special Flood Hazard Area brings elevation rules and mandatory flood insurance on most mortgages. Our guide to building in a flood zone explains both. Even outside a flood zone, check where water goes after heavy rain.
9. Trees, wetlands and protected areas
Heavy tree cover means clearing costs, and some towns require permits to remove trees above a certain size. Wetlands or streams can shrink the buildable area and bring state or federal permits. Our land clearing and site prep guide covers what drives these costs.
Checks 10–12: services and access
10. Water and sewer
Is there a public water main and sewer line in the street, and what are the tap and connection fees? In the NAHB 2024 survey, water and sewer fees and inspections averaged $6,260 and impact fees $6,367 per house, but your local schedule is what counts.[1] If there is no public service, you need a well and septic system.
11. Power, gas and internet
Ask the utilities how far the nearest service is and what an extension would cost. On rural land, bringing power a long distance can be one of the largest site costs. Our guide to the hidden costs of building a house covers utility connections in more detail.
12. Road access
Confirm the lot has legal access to a public road, not just a dirt track across a neighbor's land. A new driveway onto a public road may need a permit, and private roads may come with a maintenance agreement and shared costs.
Do not skip the location questions
The twelve checks above are about whether you can build and what it will cost. The location questions are about whether you will want to live there, and whether someone will want to buy the house from you later. They are easy to overlook when you are focused on surveys and soil.
- Daily travel. Drive the commute, the school run and the grocery trip at the times you would actually make them.
- Property tax. Ask the assessor how the land is taxed now and how a finished house would be assessed. Rates differ between neighboring towns and counties.
- What is planned nearby. Check the local comprehensive plan and recent rezoning requests for roads, commercial projects or subdivisions planned around the lot.
- Noise and neighbors. Visit on a weekday and a weekend, in daylight and after dark. Farms, highways, rail lines and industrial sites can be invisible on a listing photo.
- Resale. A very large or unusual house in an area of small homes can be hard to sell for what it cost to build. Look at what nearby homes sell for before you settle on a design.
How big a lot do you need?
Lots for new homes vary hugely. The average lot in the NAHB 2024 survey was 20,907 square feet, slightly less than half an acre.[1] Homes built for sale are often on much smaller lots: in Census data for 2025, 41% of homes built for sale sat on lots under 7,000 square feet.[2]
| Lot size | Square feet | Acres |
|---|---|---|
| Typical production-home lot (under) | 7,000 | 0.16 |
| NAHB 2024 survey average | 20,907 | 0.48 |
| One acre | 43,560 | 1.00 |
A bigger lot gives you privacy and room for a septic drainfield, a garage or a garden, but it can also mean a longer driveway, longer utility runs and more to clear and landscape. Decide what you need the land to do before you pay for more of it.
Protect yourself in the purchase contract
You can avoid most nasty surprises by making the purchase conditional on the checks above. Common contingencies for land include:
- A satisfactory survey, with no encroachments or boundary disputes.
- A passed soil or percolation test and septic permit, where needed.
- Confirmation that a building permit can be issued for your intended house.
- Utility availability, with written estimates for connection or extension.
- Financing approval, if you are taking out a land or construction loan.
- A title review with no unacceptable liens, easements or restrictions.
Give yourself enough time
Surveys, soil tests and utility estimates can take weeks. Ask each provider how long they need before you agree on the length of the due-diligence period.
Compare lots on total cost, not list price
Two lots with the same asking price can have very different all-in costs. For each lot on your shortlist, add the price, closing costs, survey and tests, clearing and grading, utility connections or well and septic, driveway, and any extra foundation work. Then compare those totals. The land share of a new home's price has moved a lot over time; in NAHB surveys it fell from 17.8% in 2022 to 13.7% in 2024, so check current local prices rather than relying on old rules of thumb.[1]
When you have the numbers, put them into the calculator: enter the land price, and use lump-sum quotes for the site work lines that your lot will change. Our hidden costs guide and the land-to-move-in checklist list the other items to include.
Plug your house size, land price and quotes into the free calculator. It uses the same NAHB 2024 averages as this guide.
Frequently asked questions
What should I check before buying land to build a house?
Check zoning and setbacks, HOA rules, easements, a survey, soil and slope, the flood zone, trees and wetlands, water and sewer, power and gas, and legal road access.
How much does a building lot cost?
It varies enormously by location. In the NAHB 2024 survey the finished lot averaged $91,057, 13.7% of the average new home’s sales price.
Should I buy land before choosing a builder?
It helps to talk to a builder before you buy. A builder can look at the lot, flag expensive site conditions and give a rough site-work estimate while you still have contingencies in place.
How long should a land purchase contingency period be?
Long enough to complete every test and estimate you need. Ask the surveyor, soil evaluator and utilities how long they take before agreeing on the period.
Sources
- NAHB: Cost of Constructing a Home 2024 Verified
- US Census Bureau: Highlights of 2025 Characteristics of New Housing Verified
Figures last checked October 18, 2026. National averages are a planning guide, not a quote. See our editorial policy and data sources.
