The Modular Home Delivery Process: Phases, Timeline, and Cost

The modular home delivery process runs in six phases, from factory completion through utility hookup. A modular home arrives as separate sections, usually two to six of them for a 2,000 square foot house, and a crane lifts each one onto a finished foundation. Plan on 12 to 36 weeks from factory order to move in, depending on permitting, site complexity, and your state. The crane day itself, the part most people picture when they hear the word delivery, takes one to two days. Everything around it is preparation and finish.

Modular is not manufactured, and the difference shows up most clearly on delivery day. A modular home is built to the same IRC or IBC codes as a site built house, travels to your lot as box sections on flatbed trucks, and is lifted onto a permanent foundation by crane. A manufactured home is built to federal HUD code, rides to the site on its own steel chassis and axles, and never sees a crane. Most guides that rank for this search blur the two. We keep them apart, because the steps, the costs, and the timeline genuinely differ. If you are still weighing one against the other, start with our modular vs manufactured comparison.

What follows is the buyer side version of the process: what each phase involves, how long it takes, what it costs, and where it goes wrong.

Site preparation runs four to eight weeks, and it starts on day one

Site preparation covers the land survey, lot clearing, foundation pour, and utility rough in. Budget $15,000 to $50,000 for most residential sites. Rural properties with no road access, steep grades, or rocky soil can run past $80,000. The single largest variable is the foundation type. Plan four to eight weeks for this phase, including permit processing, and start it the moment you place your factory order so it runs alongside the factory build rather than after it.

Foundation choice sets the floor on the cost. A concrete slab runs $8,000 to $15,000 and suits flat lots. A crawl space runs $12,000 to $20,000 and handles shallow frost lines and moderate slope. A full basement runs $18,000 to $35,000, needs full excavation, and gives you the most living space. Whichever you pour, concrete needs a minimum 28 day cure before any module can bear on it. That cure window is a hard date, and ordering modules too fast against it is one of the most common causes of a stalled set day.

The rest of the site work breaks down roughly like this:

Site prep line	Typical range
Site survey and soil testing	$1,000 to $3,000
Land clearing	$1,500 to $5,000
Access road	$2,000 to $8,000
Foundation	$8,000 to $25,000
Utility rough in	$5,000 to $15,000
Septic system (rural)	$5,000 to $20,000
Well installation (rural)	$3,000 to $15,000
Permit fees	$1,500 to $4,000
Engineering and surveys	$2,000 to $8,000

Two numbers buyers tend to miss. First, the access road has to carry a fully loaded flatbed and the crane, so it usually needs a compacted gravel base, not just a driveway. Second, building permits run 2 to 8 weeks to process, and coastal or rural counties can run longer. Submit your permit applications before or right after you place the factory order. A permit that lands after the modules leave the factory means you cannot legally set them, and the modules sit in storage on your dime.

One ratio is worth carrying into your budget. Across most market rate modular builds, factory costs typically account for 40 to 60 percent of the project total, with site work, foundation, utilities, and local labor making up the rest. Buyers who price only the modules routinely underbudget the project.

What happens at the factory, and how the modules reach your road

While your foundation cures, the home is being built indoors. Factory construction runs 6 to 8 weeks for most builders, though it can stretch to 4 to 16 weeks depending on backlog, design complexity, and the season. The modules are framed, insulated, wired, plumbed, finished inside, fitted with cabinetry, and sheathed, all under one roof. A home leaves the factory 80 to 90 percent complete.

A 2,000 square foot home typically ships as two to six modules. Each is a box section sized to fit on a flatbed trailer, and the width is capped by transport rules, not by the floor plan. Before any module leaves, most manufacturers offer a final walk through. Take it, or send your general contractor. That walk through is the only chance to catch an alignment or finish problem while it is still cheap to fix.

Every modular module is an oversize load in all 50 states. Each state on the route sets its own permit requirements, escort rules, and travel time restrictions, so a module moving from Indiana to Maine may need four to six separate state permits. Escort vehicles, the pilot cars, are required once a module passes a state width threshold, commonly 12 feet. Most modular modules run 14 to 16 feet wide, which means two escorts, front and rear, are standard. Escorts cost $1.50 to $2.50 per mile each, so a 300 mile delivery runs $450 to $750 per escort; most hauls need front and rear escorts, putting the total escort bill at $900 to $1,500.

Oversize loads move in daylight only in most states, and some bar travel on Sundays and holidays. That is why modular deliveries so often arrive at first light: the truck stages overnight nearby and rolls in at dawn. The delivery team plans the route around bridge clearances, lane widths, overhead utility lines, and weight limited roads. High winds, heavy rain, and ice all stop transport, because a tall, wide module is an exposed load that gets unstable at highway speed in a crosswind.

Crane set day

The set crew arrives at first light to check the foundation against the engineering plans before a single module is lifted. Any discrepancy found here has to be resolved before the crane picks anything up. The crew strips the protective transport wrap, trims the temporary support columns to their correct structural height, and positions the crane.

The crane has to sit close enough to reach every module, on ground firm enough to take its outriggers, and clear of overhead power lines, trees, and nearby structures. Modules are then lifted one at a time in a planned sequence, usually from one end of the foundation, and the crew guides each one onto the foundation sill with straps. Where two modules meet, they are bolted together at what builders call the marriage wall. Once all the sections are placed, the crew sets the roof structure, the gables, dormers, and peaks, and shingles it so the home is weathertight before they leave. For most homes the whole set takes one to two days. A two module single story home goes up in a day; a four to six module two story home usually takes two.

Crane access is the part of the process buyers underplan, so treat this as a checklist. Clear a path 12 to 14 feet wide for the crane and modules. Get any power lines within the crane’s reach radius temporarily lowered by the utility company, which costs $500 to $2,000 per line and needs two to four weeks of notice. Make sure the ground where the outriggers land is firm, because a week of rain can turn a workable site into an unworkable one. Trim overhead branches in advance, not on the morning of the set.

Ready to find a modular builder in your state? Browse modular home manufacturers on Prefab Market: specs, price ranges, and service areas in one place.

Finish work and inspections after the set

The set crew leaves a weathertight shell, not a finished house. The post set phase closes everything they left open, and it runs 4 to 8 weeks. It is the most variable phase in the whole process, and the one that produces the most buyer frustration.

The most visible work is at the marriage wall. Inside, the drywall across the joint has to be taped and finished, the flooring carried across, and trim and molding applied. The mechanical connections happen here too: HVAC ductwork, plumbing supply and drain lines, and electrical circuits all run between modules and join at this seam, so the plumber, electrician, and HVAC contractor each need access. Outside, the siding, roofing, and eave line at every module to module seam get flashed, sealed, and matched, which is the most complex exterior work on the build. Decks, steps, and porches are not shipped with the modules; they get built on site now.

Modular homes are inspected twice. A state licensed third party inspector witnesses the build inside the factory, stage by stage, framing through sheathing. Then local building officials inspect the home on site, under the same IRC or IBC code they apply to any site built house. This is a real difference from manufactured homes, which run under the federal HUD system instead. On site inspections typically cover the foundation, structural framing at the marriage wall, plumbing and electrical rough in for the cross module connections, insulation, and a final building inspection before occupancy.

If a phase is going to run long, it is this one, and the usual culprit is the marriage wall. When modules do not arrive within manufacturing tolerance, they do not align cleanly on the foundation, and the field fixes that follow push interior finish back by weeks. The root cause is almost always a dimensional error made in the factory, not a problem with your foundation. The cure is to catch it before the module ships, with the factory walk through from Phase 2.

Connecting utilities and the final hookups

Utility connections cover permanent electric service, water, sewer, and the final HVAC commissioning. Costs vary significantly by site: a suburban lot close to utilities needs little more than service connections, while a rural site requiring a well, a septic system, and a long electric run adds up quickly. The work itself takes 1 to 3 weeks. The constraint is almost never the labor; it is the utility company’s scheduling queue.

Electric service comes in from the road, usually at no charge unless the home sits well back from it, and a licensed electrician ties the meter base and main panel together for around $1,000. On municipal water, the tap fee runs $500 to $2,500 and the water lateral from the main to the home runs $2,000 to $5,000. A drilled well, where there is no municipal supply, runs $3,000 to $15,000 depending on depth and geology. Sewer mirrors water: a tap permit of $500 to $2,500 and a lateral of $2,000 to $5,000, or a septic system at $5,000 to $20,000 in the rural case. HVAC ductwork is already in each module, so the final step is a commissioning visit to join the ducts across the marriage wall and balance the airflow.

Book the utility appointments before set day, not after. In rural areas, an electric connection or a water and sewer tap can sit 3 to 6 weeks out in the queue, and that wait, not the digging, is what stretches this phase.

What goes wrong on a modular delivery, and how to prevent it

None of the common failures are exotic. All of them are preventable with early planning, and no manufacturer’s own guide volunteers them, so here they are.

Permit delays. Processing runs 2 to 8 weeks, and some jurisdictions want separate permits for building, electrical, plumbing, septic or well, and the driveway. If approval lands after the modules ship, you cannot set them. Submit before or right after the factory order.

Foundation timing. Concrete needs 28 days to cure before it can bear modules. Pour late, or let weather slow the cure, and the factory holds your modules in storage at a daily or weekly charge while your delivery slot slips. Aim to pour by week three of factory production.

Crane access failures. Overhead power lines are the most common day of surprise, and lines that look clear from the ground can still sit inside the crane’s reach radius. Have the utility lower them two to four weeks ahead. Soft ground stops the outriggers, so watch the forecast in the week before the set, and trim trees in advance. Walk the site with your set crew at least two weeks out and flag every obstacle.

Weather holds. Wind, rain, and ice stop transport and crane work, and a single delay cascades: the crane, the set crew, and the delivery trucks are all booked elsewhere and have to be rescheduled together. Build a two week buffer between your target delivery and any hard deadline like a closing date or a lease end.

Marriage wall misalignment. If modules ship out of tolerance, they will not seat correctly, and the field rework delays interior finish. Request a factory QA inspection of your modules before they leave, and walk the dimensions yourself or send your contractor.

The full timeline, factory order to move in

Phase	Typical duration	Notes
Site prep and foundation	4 to 8 weeks	Permit processing included; concrete cure is 28 days minimum
Factory construction	4 to 16 weeks	Runs alongside site prep; 6 to 8 weeks is typical
Transport scheduling and permitting	1 to 2 weeks	State by state oversize permits
Delivery and crane set	1 to 2 days	1 day simple, 2 days for a two story or four plus modules; weather dependent
Post set finish work	4 to 8 weeks	Marriage wall, mechanical connections, exterior seams, decks
Utility connections	1 to 3 weeks	Utility company scheduling is the main variable
Final inspections and punch list	1 to 4 weeks	State and local; occupancy permit required before move in
Total: factory order to move in	12 to 36 weeks	Simple permit friendly site at the low end, complex site or jurisdiction at the high end

Because site prep and factory construction overlap, the total is shorter than adding the phases up suggests. Most straightforward builds in permit friendly states land in the 16 to 24 week range. The 36 week end reflects slow permitting, rural utility waits, or a build where the foundation and the factory could not be run in parallel.

The single best thing you can do to protect the timeline is share one master schedule with everyone involved from day one: the factory, the transport company, the crane operator, the set crew, and the foundation contractor. Most of the delays above come from one party moving on its own clock, and a shared schedule is what keeps the foundation cure, the factory release, and the crane booking from colliding.

When you are ready to compare options, see which modular home manufacturers serve your state and what each one includes in its delivery package, or browse modular homes by size and price to set your budget before you talk to a builder. If costs are the next question, our breakdown of 2,000 square foot modular pricing walks through the factory, turnkey, and all in tiers.