Drop rooms onto the plate, pick your finish level, enter your ZIP. You get a real delivered-and-installed number, a materials list, and the current production window — before you talk to anybody. Most builders make you sit through a sales call for this.
Every module you place carries a real specification. This is what gets built.
Add rooms to generate your scope list.
Published all-in pricing from national turnkey builders, against your configuration. Figures researched from public pricing pages, July 2026.
Every unit off a line is built to the same specification with the same crews and the same materials. That repeatability is impossible to achieve across independent site-built projects with rotating subs. If you inspect one finished unit, you have meaningfully inspected the one you are buying.
A module built indoors never sits in the rain waiting on a framing crew. Lumber does not swell, drywall does not wick moisture, and the schedule does not slip because a storm parked over the site for nine days. That single difference — controlled environment versus open air — is most of why factory-built assemblies test tighter on a blower door than comparable site-built work.
Site-built construction is sequential: permit, then excavate, then frame, then finish. Factory-built runs the site work and the building in parallel. While your foundation is being poured and utilities are being trenched, the structure is already being framed and finished on a production line hundreds of miles away. That overlap is where the calendar savings actually come from, not from anyone working faster.
There is a persistent assumption that factory-built means less oversight. The opposite is true. Modules are inspected at multiple stations during production by third-party agencies, then inspected again on site after the set. A conventional stick-built house typically sees an inspector four to six times total. A modular unit is checked at every stage where a defect could be hidden by the next layer.
Every figure in this tool comes from researched market data rather than a markup on a guess. Module costs reflect installed cost for that scope of work. The per-square-foot structure rates at $265, $325 and $395 bracket the finish spectrum from durable-and-clean through architectural-grade. Site costs are the real ones: foundation at $38 to $52 per square foot, trenching at $185 per foot past the first 50, crane beyond 100 feet of reach, permits and plan check, survey and certification, and freight at $7 per loaded mile.
The comparison column uses published all-in pricing from national turnkey builders whose pricing pages are public as of July 2026. Those companies are transparent about their numbers, which is exactly why they are useful benchmarks. We are not representing anything on their behalf — the figures are theirs, published by them, cited for comparison.
On the production window. The range this tool returns is driven by scope, then presented as a band because factory capacity is a supply-and-demand variable. Queue depth changes weekly. Material lead times on steel, glazing and finish goods have tightened, and seasonal demand compresses the calendar heading into spring. A window we quote today holds for the current production block. It is a real range, not a marketing number, which is why it moves.
These are in the tool above as separate lines. Most quotes fold them into a per-square-foot number or leave them out until you are committed.
| Foundation | $38–$52 per sq ft |
| Utility trenching | First 50 ft typical, then $185 per ft |
| Crane | Included to 100 ft reach, then $2,900 + $95 per ft |
| Permits and plan check | $8,900 |
| Survey, staking and certification | $5,400 |
| Site clearing and grading | $4,200 |
| Slope or poor soil adder | $3,600 |
| Septic system | $14,500 |
| Well | $11,800 |
| Electrical service upgrade | $3,400 |
| Demolition of existing structure | $9,200 |
| Freight | $7 per loaded mile |
We start with what the site will actually allow: zoning, setbacks, utility availability, flood zone, access width for a truck and crane, and whether the jurisdiction has a defined modular pathway. This is where projects get saved or killed, and it costs nothing to find out.
Layout, finish level and options are locked, and the price for the building is set at that point. Site work is priced separately and transparently, because that is the number that varies with your specific lot and the one most suppliers hide until you are committed.
Plans go to the state modular program or local authority while the site work begins. Running these concurrently rather than sequentially is where most of the schedule advantage lives.
Your unit enters the line. Framing, envelope, mechanical rough-in, insulation, drywall, finish, fixtures and cabinetry happen at successive stations with inspection at each. You get progress documentation rather than guesses.
Foundation is poured or set, utilities are trenched and stubbed, access is prepared for the delivery truck and crane. This runs while your unit is in production.
Modules are transported and craned onto the foundation. For a single-module building this is typically a matter of hours, not days — the set itself is the fastest part of the entire project.
Marriage lines are joined, mechanicals and utilities are connected, exterior finishes are completed at the seams, final inspection is called, and you get your certificate of occupancy along with documentation.
Send us your build and we will confirm a production slot, a firm site-specific number, and a delivery date. No obligation, no sales call required to get the number.
We run a group of focused sites so you land on the one that matches what you actually need instead of a catch-all catalog.