The cheapest ways to build a house

1. Build smaller

Size drives almost every cost in a house: more foundation, more framing, more roof, more flooring, more wall to insulate and heat. Cutting square footage is the single most reliable way to lower the total.

For a sense of scale, the median new single-family home completed in the US in 2025 had 2,142 square feet of floor area, according to the Census Bureau.[3] Many households need less than that, especially with a well-planned layout.

Start with the rooms you will actually use every day, and question the rest. A formal dining room that hosts two dinners a year, a guest room that sits empty, or a second living area can each add a lot of square footage. An open kitchen, dining and living area often feels larger than separate rooms of the same total size.

The price per square foot usually rises a little as a house gets smaller, because the kitchen, bathrooms and mechanical systems cost roughly the same whatever the size. The total still drops, and the total is what you pay.

2. Keep the shape and roof simple

A rectangle is the cheapest shape to build. Every extra corner, bump-out or jog in the outside walls adds framing, foundation work, siding detail and labor, and each one is another spot where water can get in if it is not done well.

The roof works the same way. A plain gable roof is cheaper to frame and cover than a roof with valleys, hips, dormers and multiple ridgelines. If you like a more interesting look, put the money into one feature you will notice, such as a covered porch, and keep the main roof simple.

Two other choices help:

• Group the bathrooms, kitchen and laundry close together, or back to back, so plumbing runs are short.
• Design around standard material sizes. Framing lumber, sheathing and drywall come in fixed lengths and widths, and room dimensions that fit them mean less cutting and less waste. Your designer can do this from the start at no extra cost.

A two-story house can also save money compared with a single-story house of the same floor area, because it has a smaller foundation and roof. It adds stairs and may need more structural work, so ask your builder to price both versions before you choose.

3. Use a stock plan

A custom design from an architect is the most expensive way to get house plans. Stock plans, sold ready-made and often adjustable for a modest fee, cost much less and have usually been built many times before, so the problems have been worked out.

Before you buy a plan, check three things: that it can be adapted to your local building code and climate, that it fits your lot (width, slope and setbacks), and that your county will accept it for a permit. Many counties also require an engineer's stamp or energy calculations, which you will need to budget for either way.

Builders who use the same plans repeatedly can often price them more tightly, because they already know the quantities. Ask builders in your area whether they have their own plans you could start from.

4. Choose the lot carefully

The cheapest lot to buy is not always the cheapest lot to build on. A rural parcel with no water, sewer or power nearby, a steep slope, heavy tree cover or poor soil can add tens of thousands of dollars before the foundation goes in. Our guide to the hidden costs of building a house covers these site costs in detail.

A lot with these features usually costs less overall:

• Water, sewer (or an approved septic site), power and gas at or near the street.
• A fairly flat building area with good drainage.
• Soil that suits a standard foundation.
• Few trees to clear where the house will sit.

If you are comparing a cheap rural lot with a more expensive lot in a subdivision, add the site and utility costs to the rural lot before you decide.

5. Consider a factory-built home

Factory-built homes come in several types, and the Census Bureau defines them clearly:[2]

• Manufactured homes are built in a factory to the federal HUD code, on their own chassis, and are designed to be towed to the site. They do not need a permanent foundation, although many are placed on one.
• Modular homes are built as finished three-dimensional sections in a factory, then joined together on a permanent foundation at the site.
• Panelized homes arrive as a package of wall panels, roof trusses and other parts that are assembled on site.
• Precut homes arrive as lumber or logs cut to exact sizes, ready to assemble.

Manufactured homes are the lowest-cost option by a wide margin. In January 2026, the average sales price of a new manufactured home in the US was $131,700, with single-section homes averaging $85,400 and double-section homes $160,100, according to Census data published by the Federal Reserve Bank of St. Louis.[1] For comparison, the median contract price for a site-built house built by a general contractor on the owner's land was $404,000 in 2025.[3] Neither figure includes land, but the homes differ a lot in size and finish, so treat this as a rough comparison.

Modular homes sit on a permanent foundation like a site-built house.[2] Whether they save money compared with building on site depends heavily on your area, the distance from the factory, crane and setup costs, and how much site work your lot needs.

Before choosing any factory-built option, check local zoning, which in some places limits where manufactured homes can go, and ask lenders how they would finance it. Budget separately for the foundation, delivery, setup, utility connections and site work, because the home price covers none of those.

6. Act as your own general contractor (carefully)

The general contractor coordinates the trades, orders materials, schedules inspections and takes responsibility for the result. Doing that yourself can save the contractor's overhead and profit, and the Census Bureau tracks these "owner-built" homes as a separate category.[2]

It comes at a cost in time. In Census data for 2022, owner-built homes took an average of 12.1 months from start to completion, against 10.1 months for homes built by a general contractor on the owner's land and 7.6 months for homes built for sale.[6] Every extra month adds loan interest and rent.

Being an owner-builder suits people who have construction experience, live near the site, and can make decisions quickly. It is a poor fit for anyone with a full-time job elsewhere and no trade contacts. Check your state's and county's rules too, because owner-builder permits are not treated the same everywhere, and ask lenders early whether they will finance an owner-built project.

7. Put in sweat equity

Doing some of the work yourself lowers labor costs. The safest jobs for most owners are the finishing ones: interior painting, installing trim and hardware, landscaping, and cleaning up. Leave structural, electrical, plumbing, gas and roofing work to licensed professionals, both for safety and because permits and inspections often require it.

For lower-income households in rural areas, there is a federal program built around this idea. Through the U.S. Department of Agriculture's Mutual Self-Help Housing program, local organizations supervise groups of very-low- and low-income families who build their own homes together, with group members providing most of the construction labor on each other's homes.[4] USDA says this work lowers construction costs, and families finance the homes with an affordable USDA mortgage.[5] In 2014, the 870 participating families each built about $27,500 in equity in their new homes, according to USDA.[5]

To find out whether a self-help project runs near you, use USDA's property eligibility site and contact your state Rural Development office, both linked from the program page.[4]

8. Finish some spaces later

You do not have to finish every room on day one. Common ways to phase a build:

• Leave a basement or bonus room unfinished, with plumbing roughed in for a future bathroom.
• Build the garage, deck or porch later, once the main budget has settled.
• Start with simpler finishes in rooms that are easy to upgrade later, like bedrooms, and spend more in the kitchen and bathrooms, which are harder to redo.

Plan phased work from the start. Running plumbing or wiring to a future space during construction costs far less than opening finished walls later, and the permits are simpler.

9. Get competing quotes and avoid change orders

Get at least three quotes for the same plan and the same specification, with a written list of what each includes. Prices for the same house can vary a lot between builders, and the cheapest quote is only cheaper if it includes the same things.

Then make your decisions before construction starts. Change orders are one of the main ways projects go over budget, because each change carries its own price and often an admin fee, and late changes can disrupt the schedule. Choose your finishes, fixtures and appliances before you sign, and ask for allowances in writing.

The QuickBuildCost calculator helps with this step. You can enter your own supplier and contractor quotes for each stage of the build and see how they compare with national averages.

10. What not to cut

Some savings cost more later. These are worth paying for:

• The foundation and drainage. Problems here are expensive to fix after the house is built.
• The roof and the building envelope: flashing, house wrap, windows installed properly. Water damage costs far more than doing it right.
• Insulation and air sealing. They are cheap to add during construction and difficult to add afterwards, and they lower your energy bills for as long as you live there.
• Licensed trades and permits. Unpermitted work can cause problems with insurance, financing and selling the house.

It is better to build a smaller house well than a bigger house badly.

Frequently asked questions

Sources

1. Federal Reserve Bank of St. Louis (FRED), "Average Sales Price of New Manufactured Homes by Region and Size of Home," release table for January 2026. Data source: U.S. Census Bureau, Manufactured Housing Survey.
2. U.S. Census Bureau, "Survey of Construction Definitions" (Construction Method, "HUD-code" Manufactured Home, Owner-built Houses, Contract Price).
3. U.S. Census Bureau, "Highlights of 2025 Characteristics of New Housing," published July 2026.
4. U.S. Department of Agriculture, Rural Development, "Mutual Self-Help Housing Technical Assistance Grants."
5. U.S. Department of Agriculture, blog post on the 50th anniversary of the Mutual Self-Help Housing Program.
6. U.S. Census Bureau, "Average Length of Time from Start to Completion of New Privately Owned Residential Buildings."

Figures are national averages and medians from U.S. government data and are for planning only. Costs in your area may be very different. Check local codes and get written quotes from licensed professionals.

Figures last checked October 5, 2026. National averages are a planning guide, not a quote. See our editorial policy and data sources.