How Much Does Modular Multifamily Cost to Build? (2026)

Modular multifamily — units built in a factory and assembled on site — promises speed and cost control, but the real number depends on how you count factory, transport and site work together. In 2026, modular multifamily typically costs $130,000 to $280,000 per unit, before land.

Modular's headline advantage is time: factory and site work happen in parallel, often cutting months off the schedule. On price it's competitive with site-built and sometimes cheaper, but savings vary by market and project size.

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$130k–$280k per unitFaster scheduleCompetitive vs. site-built

How Much Does Modular Multifamily Cost to Build? (2026)

2026 cost dataFactory + site

Where modular saves — and where it doesn't

Time — factory fabrication runs parallel to site and foundation work, often saving 20–50% of schedule.
Labor markets — modular helps most where skilled site labor is scarce or expensive.
Repetition — the more identical units, the more the factory line pays off.
Site & transport — foundations, utilities, cranes and long hauls are real costs that offset factory savings.
Not always cheaper — in low-cost labor markets, site-built can match or beat modular on price.

Designing for modular

Modular rewards discipline: unit dimensions that fit transport limits, a repeating module, and mechanical stacking that lets the factory finish as much as possible before shipping. A plan drawn for modular from the start captures far more of the savings than converting a site-built design late.

We design multifamily plans that are modular-ready — coordinated to your fabricator's module sizes and site logistics — so the schedule and cost advantages actually land.

Modular multifamily cost by size (2026)

Project size	All-in cost per unit	Notes
Small — 5–12 units	$150k – $280k	Fixed setup spread across fewer units
Mid — 13–30 units	$140k – $250k	Factory repetition starts to pay off
Large — 31+ units	$130k – $230k	Best economies of scale on repeating modules

Includes factory + typical site assembly; excludes land. Transport distance and foundation/site conditions shift these. Start a brief for a project-specific estimate.

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Frequently asked questions

Is modular multifamily cheaper than site-built?+

Sometimes. Modular is competitive with site-built and can be cheaper, especially where site labor is scarce and units repeat. Its most reliable advantage is speed — often 20–50% less schedule — rather than guaranteed price savings.

How much does modular multifamily cost per unit?+

Typically $130,000–$280,000 per unit in 2026 including factory and site assembly, before land. Larger, more repetitive projects sit at the low end.

What has to be designed differently for modular?+

Units must fit transport dimensions, use a repeating module, and stack mechanicals so the factory can finish more before shipping. Designing for modular from the start captures the most savings.

Does the estimate include land and foundations?+

Foundations and typical site assembly are included in the ranges; land, long-distance transport and unusual site work are separate.

Design modular-ready multifamily

Tell us your program — a designer prepares modular-ready plans and an RSMeans-based cost estimate, and contacts you within 1 business day.