Filling vacant lots is one of the most direct ways to add income to a manufactured housing community, and the mechanics of doing it are well covered. The decision is not. Whether demand actually exists, which lots to fill first, whether to rent or sell the home, and how to tell if the programme is working are all separate questions, and getting them wrong is expensive in a way that is slow to become visible. This is one of several ways manufactured housing communities require different operational thinking from other residential property.

This article describes general commercial and operational practice. It is not investment advice. Programme terms, eligibility and market conditions vary. Confirm the specifics for your own community.

First Question: Does the Demand Exist?

This is the question underwriting models skip, because a vacant lot on a spreadsheet looks the same in every market. Operators discussing infill on industry forums make the point directly: before underwriting value-add income from filling lots, do a proper demand study, because a pad being physically available does not mean anyone wants to live on it.

The test ad is the cheapest way to find out. Advertise a home for sale in that community, at the price you would actually charge, before you commit capital. You are not selling anything. You are measuring how many enquiries arrive and what they look like.

Run it before a purchase if you are underwriting infill upside into an acquisition. Run it before you buy the first home if you already own the community. Commercial commentary in the sector makes the same point from the other direction: infill may be less compelling in markets with declining populations or limited affordability advantages, because even where pads are available, demand may not materialise.

A test ad that produces nothing is the cheapest lesson available in this business. A test ad that produces twenty enquiries in a week gives you a much stronger demand signal than an empty inbox. The next question is how many of those enquiries can actually qualify and convert.

Second Question: Why Hasn't It Been Filled Already?

If you are buying a community with vacant lots, this question deserves a real answer rather than an assumption. The optimistic reading is that the previous owner simply did not have the energy. That happens frequently, and operators point out that just because the current owner has not filled the lots does not mean they cannot be filled. Infill is genuinely hard work, and a mom-and-pop owner nearing retirement has little reason to take it on.

The pessimistic readings are also real, and they are what your diligence is for. The lots may not be usable. Utility stubs removed, pads deteriorated, access blocked. The lot dimensions may not take a modern home. Zoning or local ordinance may restrict what can be sited, particularly where a replacement home age limit or appearance standard applies.

The lots may sit in a designated flood-hazard area, which affects insurance, installation requirements and in some cases eligibility for funding. Or the demand may not be there, which your test ad will tell you. Ask the seller directly and listen to the answer. "We just never got around to it" is a different community from "we tried in 2019 and couldn't fill them."

The Sequencing Question Nobody Asks

Assume demand exists and the lots are usable. You still cannot fill twenty at once, so which do you fill first? Most operators answer this by accident, filling whichever lot the next home happens to fit. That leaves money on the table, because the lots are not equivalent.

Six things that should drive the order.

1. Cost to make ready:
   Lots vary enormously in what they need before a home can arrive. A lot with intact utility stubs, good grade and clear access might cost a fraction of one needing a new pedestal and drainage work. Fill the cheap ones first and you get more lots filled per dollar in the early period, which funds the next round.

2. Clustering:
   Filling three adjacent lots costs less per home than filling three scattered ones, because mobilisation, crew time and utility work all share overhead. It also looks like progress, which matters more than it should.

3. Visibility:
   The lots visible from the entrance do double duty. A filled, tidy lot near the front sells the next home for you. A vacant weedy lot at the entrance costs you enquiries you never knew you lost.

4. Lot dimensions:
   Some lots take a modern double-wide and some do not. Knowing which is which before you buy a home avoids the expensive discovery.

5. Flood zone status:
   Lots in designated flood-hazard areas can carry additional installation and floodplain-management requirements, insurance implications and, under some funding programmes, eligibility restrictions. Establish which of your vacant lots are affected before planning around them.

6. And proximity to problems:
   A lot next to a chronically non-compliant resident is harder to sell than an identical lot elsewhere. Fixing the enforcement problem may be a prerequisite for filling the lot rather than a separate task.

7. Write the order down:
   A ranked list of vacant lots with the reason for the ranking is a five-minute document that changes how the programme runs.

Rent or Sell: The Capital Question

The two infill models have completely different capital and risk profiles, and the choice determines how far your money goes.

Buying homes and renting them accelerates occupancy, because you control the timing and do not wait for a buyer. Commercial commentary describes this as requiring higher capital investment and ongoing maintenance, and introducing operational complexity alongside the upside. You also add to your park-owned home count, which carries financing, insurance and maintenance consequences.

Facilitating tenant-owned homes requires less capital and less operational burden. You are enabling residents to buy rather than buying yourself. Slower per lot, and it scales further with the same money.

The honest way to compare them is capital per lot filled and time to occupancy, side by side. Renting fills faster and consumes more capital per lot. Selling fills slower and consumes less. Which is right depends on how much capital you have, how quickly you need occupancy, and what your park-owned ratio can absorb. Running both models without a deliberate capital decision can produce a park-owned home count that grew by accident rather than by plan.

State Funding Exists, and It Is Easy to Miss

This is a part of infill that operators can easily miss.

Vermont runs a Small-Scale Capital Infill programme through its Agency of Commerce and Community Development, available to owners of mobile home parks in the state to infill vacant or abandoned lots. The terms below are current programme terms and are worth confirming on the agency's page before you plan around them.

• Owners can be awarded up to $20,000 per lot

• The park and owner must be registered in the Registry of Vermont Mobile Home Parks

• Parks applying for more than two lots require an additional review process, with a maximum of ten lots per park

• The lot must be made available for a homeowner, not a rental home

• Projects must be approved before work begins, with no retroactive payment

• Lots in flood zones may be ineligible or require additional review

• The programme also includes marketing support to help home-seekers find vacant lots around the state

Read that fourth condition again. Vermont's programme funds infill only where the result is a tenant-owned home, which means the funding and the rent-or-sell decision are linked. If you take the money, you have chosen the model.

Vermont is one state, and the terms are Vermont's. The general lesson is that state and local housing programmes touching manufactured housing infill exist, are underpublicised, and are worth an afternoon's research before you commit your own capital. Start with your state housing agency and your state manufactured housing association.

How to Tell Whether It Is Working

Four numbers, tracked per community.

Lots filled per quarter, against your plan. The obvious one, and the one most operators do track.

All-in cost per lot filled, which is the harder one and the one that actually matters. If you cannot produce it, you cannot compare infill against any other use of the capital.

Days from home acquisition to occupancy, which tells you where the programme is slow. A long gap usually means either the lot was not as ready as assumed or the sales pipeline is leaking.

And the enquiry rate, which is your ongoing demand signal. Falling enquiries with lots still vacant is the earliest warning that the market has changed, and it arrives long before the occupancy number moves.

One thing to watch in the reporting. Occupancy in this sector should be measured as occupied homesites against usable homesites, not against platted lots. A community with 120 platted lots where only 104 can take a home is at a different occupancy than the plat suggests, and infill capacity is 104 minus occupied, not 120 minus occupied.

When Infill Is Not the Answer

Worth saying, because the sector treats infill as automatically correct.

When the demand is not there. Your test ad told you. Believe it.

When the lots need more work than they are worth. A lot requiring a new pedestal, drainage correction and a pad rebuild may cost more to make ready than several years of its own lot rent.

When your capital has a better use. A community with failing water infrastructure and ten vacant lots may be better served fixing the water. Infill adds income; failing infrastructure threatens all of it.

And when your park-owned ratio cannot take it. If you are near your lender's threshold, filling lots with homes you own moves you the wrong way regardless of what it does to occupancy.

Conclusion

The mechanics of filling a lot are well documented. The decisions around it are not, and they are where the money is made or lost.

Three things worth carrying away.

1. Test demand before you commit capital. A test ad costs almost nothing and gives you a demand signal on the only question that determines whether the rest of the programme works.

2. Sequence the lots deliberately. Cost to make ready, clustering, visibility, dimensions, flood-hazard status and proximity to problems all vary lot by lot, and filling in the right order gets more lots filled with the same money.

3. And find out whether your state funds this. Vermont currently awards up to $20,000 per lot under conditions that include the home going to an owner rather than a renter. Other states run their own programmes. An afternoon of research is cheap against the cost of a home.

Frequently Asked Questions

1. How do I know if there is demand to fill vacant lots?
Run a test ad before committing capital. Advertise a home for sale in that community at the price you would actually charge and measure the enquiries. Operators recommend doing this before underwriting infill upside into an acquisition, because a pad being physically available does not mean anyone wants to live on it. Treat enquiries as a demand signal rather than proof, and check how many can actually qualify and convert.

2. Which vacant lots should be filled first?
Rank them rather than filling whichever the next home fits. The factors that should drive the order are cost to make the lot ready, clustering adjacent lots to share mobilisation cost, visibility from the entrance, whether the lot takes a modern home, flood-hazard status, and proximity to problem lots. Those vary enough that the order materially affects how many lots you fill per dollar.

3. Is it better to rent or sell homes when filling lots?
They are different capital models. Buying and renting fills lots faster but requires more capital per lot and adds maintenance and park-owned home count. Facilitating tenant-owned homes requires less capital and less operational burden but fills more slowly. Compare them on capital per lot filled and time to occupancy rather than choosing by default.

4. Are there grants for filling vacant mobile home lots?
Some states run programmes. Vermont's Small-Scale Capital Infill programme currently awards up to $20,000 per lot to registered park owners, with a maximum of ten lots per park, a requirement that the lot go to a homeowner rather than a rental home, prior approval before work begins, and possible eligibility restrictions for lots in flood-hazard areas. Programme terms change, so confirm current details with the agency. Check your own state housing agency and state manufactured housing association.

5. What should I measure to know if infill is working?
Lots filled per quarter against plan, all-in cost per lot filled, days from home acquisition to occupancy, and the enquiry rate. The enquiry rate is the earliest warning signal, because falling enquiries with lots still vacant tells you the market has changed before the occupancy number does.