Wondering what a modular home cost really adds up to? One guide puts the national average at $270,000, but the factory price is only part of the bill. Site work and finishing add a lot.
This guide is part of our series on buying a modular home.
| Item | Typical value |
|---|---|
| National average price | $270,000 |
| Typical price range | $180,000 to $360,000 |
| Basic house, per square foot | $80 to $160 per square foot |
| Excavation and foundation | $20,000 to $35,000 |
| Delivery and crane | $4,000 to $8,000 |
Figures come from Bob Vila’s modular price guide and Build & Construct’s cost article. They can change, so check the sources before you rely on them.
What is the average modular home cost?
Bob Vila’s guide says modular home prices range from $180,000 to $360,000, with the national average at $270,000. It also cites Angi and HomeAdvisor for the same range.
The same guide says the average price runs from $80 to $160 per square foot for a basic house that includes site preparation, the base unit, delivery, installation, and finishing. Treat that as a starting point, not a quote for your lot.
Several things move the number:
- Home size, style and brand
- How much land clearing is needed
- The type of foundation
- Delivery charges and local labor prices
- Utility connections
Because published ranges are wide, the useful question is not “what is the average?” but “what does my site add to the factory price?”
Why the base price is not the final price
Build & Construct explains that the base price quoted by manufacturers typically covers only the assembled modules delivered to the site. It leaves out excavation, foundations, utility connections, site assembly, and permits.
Its example is a base price of $120,000 to $150,000 for a 1,700 square foot home. In that breakdown the base price is a minority of the total, so most of what you pay comes from everything else.
The article’s other line items are:
- Energy upgrades and customization: $20,000 – $35,000
- Excavation and foundation: $20,000 – $35,000
- Delivery and crane: $4,000 – $8,000
- On-site assembly (button up): $30,000 – $50,000
- Site improvements (utilities, driveway): $35,000 – $60,000
- Permits and fees: $3,000 – $8,000
These are one trade article’s ranges for one example home. Your own quotes will differ.
Costs that happen on your lot
Excavation and foundation work typically runs $20,000 to $35,000 depending on soil conditions and basement depth. Delivery and crane placement adds another $4,000 to $8,000.
Then comes on-site assembly. Connecting modules, sealing joints and completing roofing and siding connections costs $30,000 to $50,000 according to the same source.
Electrical service from the lot line, plumbing connections and HVAC hookups can range from $15,000 to $30,000. If the site needs a well and septic system, those could add $20,000 to $50,000 or more, depending on local conditions and regulatory requirements.
Permits are the smaller item here, but they vary by county. Ask your local building department what it requires before you sign a contract.
Is modular cheaper than site-built?
Often, but not by a huge margin. Bob Vila’s guide calls building a modular home more cost-effective than constructing a traditional stick-built home.
Build & Construct says a well-managed modular project typically saves 10 to 20 percent on basic construction costs compared to a comparable custom-built home. However, when land, site development, and financing are factored in, it says the overall savings may shrink to only 5 to 10 percent of the total package price.
Time is the other gain. The same article says a typical modular project can go from foundation completion to move-in ready in 8 to 12 weeks, compared to 6 to 12 months for traditional construction. Shorter schedules can mean less interest on a construction loan, though that depends on your lender.
How customization and brand affect the price
Bob Vila’s guide states plainly that customizing a modular home will increase the total building cost. Choices such as layout changes, finishes and added stories all push the figure up from a standard plan.
Build & Construct lists energy upgrades and customization at $20,000 – $35,000 in its example. That is a sizeable line, so decide early which upgrades are worth paying for.
When you compare builders, Bob Vila’s guide suggests asking whether the price covers delivery and installation fees and the cost of additional customizations. Two quotes with the same headline number can include very different things.
It also points out that tax rates vary from state to state and city to city. Check what applies where you plan to build.
Modular, mobile and manufactured homes are not the same
A modular home is built off-site at a factory, transported to the permanent housing area in sections, and assembled, connected to utilities, and secured on-site, according to Bob Vila’s guide. Older mobile homes sit in a different category.
The guide notes that the National Mobile Home Construction and Safety Act of 1974 and the HUD Manufactured Home Construction and Safety Standards of 1976 set safety guidelines for factory-built homes of that type. Be careful when comparing prices online: a figure for a mobile or manufactured home is not a figure for a modular house on a permanent foundation.
Always confirm which type a quote refers to before you compare it with others.
What quotes often leave out
Build & Construct warns that the most common mistake buyers make is focusing on the base price without understanding what is excluded. Many quotes do not include appliances, window treatments, garage construction, landscaping, driveways, walkways, or decks.
Read up on modular home hidden costs for a fuller checklist of extras. Our guide to modular home financing covers how to pay for the project.
How to build a realistic budget
- Ask each builder for a quote that covers the base unit, delivery, crane, foundation and assembly, not just the factory price.
- Price your lot separately: soil, access, utilities, and whether you need a well and septic system.
- List what is excluded, such as appliances, garage, driveway and landscaping, and add your own estimate.
- Compare the total with an itemized site-built quote for the same plan.
- Keep a reserve for items you could not price in advance.
This site is an independent guide. It does not sell homes, take enquiries or give personal advice.
Frequently asked questions
What is the average modular home cost?
Show answer
Bob Vila’s guide gives a national average of $270,000, within a range of $180,000 to $360,000.
How much does a modular home cost per square foot?
Show answer
The same guide says a basic house, including site preparation, delivery, installation and finishing, runs from $80 to $160 per square foot.
Is the base price the final price?
Show answer
No. In Build & Construct’s example the base price is a minority of the total, with foundation, assembly, utilities and fees making up much of the rest.
Do I need a well and septic system?
Show answer
Whether you need either system depends on the water and sewer connections available to your lot and local requirements. Build & Construct says those could add $20,000 to $50,000 or more.
