Guide
The infill playbook — vacant lot to occupancy
Why infill runs four to six months per lot across the industry, where that time actually goes, the licensing constraint most operators discover late, and how to compress the cycle.
The number, and where it goes
Infill in this industry commonly runs four to six months per lot at fifteen to thirty thousand dollars and up.
Ask an operator where the time went and almost nobody can produce a breakdown. That is the whole problem: a cost nobody can decompose is a cost nobody can reduce.
Here is the decomposition.
It is not the construction. Lot prep, set, utility connection, skirting and make-ready is a matter of days of actual work, plus curing and inspection.
It is the handoffs. In the standard model that sequence is five separate vendors with five independent schedules and no single party accountable for the date the lot starts earning:
- The transporter is waiting on the pad
- The setter is waiting on the transporter
- The utility contractor is waiting on the set
- The skirting crew is waiting on the utilities
- The make-ready crew is waiting on all of it
Every one of them is individually reasonable. The gaps between them are the four to six months.
The sequence
Lot preparation
Grade, pad, drainage, access. Everything above it inherits it — a pad on poorly compacted fill produces piers that move, and that shows up as cracks and doors that will not latch in a home that was perfect at set.
Transport and delivery
Access inside the community is the constraint, not the road to it.
Set, blocking and anchoring
Piers, blocking and tie-downs specified to the HUD Wind Zone at that location. Licensed work, state-specific.
Utility connection
Almost always the longest lead item and almost never the one being tracked.
Skirting and exterior
Perimeter closed, ventilated and accessible. Steps and landings built to the finished grade.
Make-ready
Interior to rent-ready, so the lot produces income rather than sitting complete-but-empty.
The four levers that actually compress it
1. Start the queue at scope approval
Permitting and utility appointments are queue times outside anyone's control. Starting them when the home is already on the lot means they run in series after everything else.
Starting them at scope approval costs nothing and runs them in parallel with the physical work. On most stalled programmes this single change accounts for most of the available improvement.
2. Walk the delivery path before scheduling
The constraint on delivering into an occupied community is almost never the road in. It is the last two hundred feet: turning radius at the lot, an overhead line at the wrong height, a mature tree, a neighbouring home set close to the line, a corner a transporter physically cannot make.
None of it is visible on a site plan. A transport that arrives and cannot place the home is the most expensive single hour in the programme.
3. Check the electrical service against the incoming home
A lot that previously held a small single-wide may carry a service that will not support a modern double-wide with electric heat.
Discovering that at connection is a utility company timeline, not a contractor timeline — typically weeks. It is a fifteen-minute check at scoping.
4. Remove the handoffs
If one party owns lot prep through make-ready, there is no queue between trades belonging to different companies. That is not a claim about faster crews. It is a claim about there being no dead time between them — which, against a four-to-six-month baseline, is where essentially all of the improvement lives.
Vacant lots in an acquisition model
Vacant lots are frequently underwritten at an industry-average infill cost applied across the lot count.
That average conceals the variables that actually decide it: lot condition, utility stub condition (unknowable until exposed), delivery access inside the community, and whether your intended contractor can legally perform the set in that state at all.
A pre-acquisition walk that assesses vacant lots individually is a materially better underwriting basis — see acquisition and due diligence.
Programme economics
A single lot is a project. Ten lots is a programme, and the difference is not linear: crews stay mobilized rather than demobilizing and returning, permitting runs in parallel, utility scheduling batches, material orders consolidate.
If a contractor quotes ten lots at ten times one lot, they are pricing ten projects.