Construction loan vs. renovation loan
You have found a house that needs work, or a lot with nothing on it, and you need to know what you can borrow and how the money reaches the contractor. Three questions sort it: is the existing house staying, does the equity already exist, and how much work will the loan carry against what the finished house is worth. Here is the math for each, and the numbers worth running before you write an offer.
Is the existing house staying?
This is what separates construction financing from renovation financing, and it is not about the size of the budget. A renovation loan has no minimum dollar amount and no restriction on the type of work. You can take a house to the studs, move every wall, add a second story and put in a pool, and it is still a renovation.
What a renovation loan cannot do is a complete tear-down and reconstruction of the dwelling. That is the boundary.
| What you are doing | What you need |
|---|---|
| Building on vacant land | Construction-to-permanent |
| Demolishing the house and rebuilding | Construction-to-permanent |
| Gut renovation, walls and roof stay | Renovation loan |
| Adding a second story or an addition | Renovation loan |
| Adding an accessory dwelling unit, garage or pool | Renovation loan |
| Finishing a build the previous owner abandoned | Renovation loan, if at least 90% complete |
That last row is worth knowing. A house a builder walked away from, at least 90% complete, can be finished with a renovation loan rather than construction financing — a considerably simpler transaction. If you land on the construction side of the line, the structural decisions there are different, and worth reading before you buy the lot.
Does the equity already exist?
Before comparing renovation programs it is worth checking whether you need one. A renovation loan is sized on what the house will be worth finished. A HELOC or a fixed second is sized on what it is worth today. If today’s value already covers the work, the second lien is usually the cheaper instrument — because a renovation refinance re-prices every dollar you already owe in order to reach the dollars you are spending on the kitchen.
A $60,000 kitchen, two ways
A home worth $500,000. A first mortgage of $300,000 at 5.5%.
Renovation refinance
One new loan of $360,000. Call it 6.875%. First-year interest: $24,750.
Keep the first, add a HELOC
The $300,000 stays at 5.5%. Add a $60,000 line at 7.43% — a higher rate on a much smaller balance. First-year interest: $20,958.
The HELOC costs $3,792 less in year one, about $316 a month, at a blended cost of 5.82% against the refinance’s 6.875%. It also skips the contractor approvals, the draw schedule and the completion deadline.
When the equity is not there yet, the arithmetic reverses, and this is the case renovation lending exists for.
When the work is what creates the equity
Buying a fixer for $200,000. Worth $400,000 finished. You need $150,000 of work.
What a second lien reaches
Measured against today’s $200,000. At a typical 80% combined ceiling that is $160,000 in total, and the first mortgage has used it. Available for the work: $0.
What a renovation loan reaches
Sized on the as-completed $400,000, so up to $300,000 of work. Your $150,000 fits comfortably.
The paperwork a renovation loan asks for is buying you access to value that does not exist yet. When the equity is already there, you are paying that price for nothing.
On the second-lien side I will say plainly that I am usually not the cheapest option for a $60,000 line. Banks and credit unions hold these on their own books, which lets them waive closing costs and price the margin thin to win the deposit relationship, and several credit unions go to 90% or 95% combined loan-to-value where most banks stop at 80–85%. If that is where your numbers land, that is where you should be. The full comparison is on the cash-out versus HELOC page.
Three cases where the renovation loan wins even with equity. The house is not habitable or lendable as-is, so no second-lien lender will touch it until the work is done. The project is large enough that the combined loan-to-value ceiling cuts you off. Or you are buying, and need the purchase and the work inside one approval rather than closing first and arranging financing afterwards.
How much work will the loan carry?
HomeStyle caps the renovation budget, and it is calculated differently on a purchase than on a refinance. Both are worth knowing before you price a scope of work.
The two formulas
Refinance
Renovation cost may not exceed 75% of the as-completed appraised value.
Purchase
Renovation cost may not exceed 75% of the lesser of (purchase price plus renovation costs) or the as-completed appraised value.
The purchase formula has the renovation budget on both sides of the equation. Solve it and you get a check you can run in your head: on a purchase, the renovation budget cannot exceed three times the purchase price — or 75% of the as-completed value, whichever is lower.
That three-times figure is not written in any guideline as a sentence; it falls out of the arithmetic. But it takes about ten seconds and it is the fastest way to size a project before anyone orders an appraisal.
Where the purchase cap actually binds
On an ordinary purchase it never comes close. Put $80,000 of work into a $400,000 house and you are nowhere near it.
It binds when the work is large relative to the price — roughly, when the budget is more than three times what you paid. That means distressed buys, foreclosures, and family-price sales between relatives. A derelict house at $80,000 with $300,000 of planned work is over the line: three times $80,000 caps the renovation budget at $240,000, so either the scope comes down or the purchase price needs to be higher.
Run the three-times check before you write the offer, not after the plans are drawn. On a distressed purchase it is the number most likely to reshape the deal.
One useful consequence of that formula: on a very cheap property, paying a little more for the house raises your renovation ceiling by three times the difference. It is a strange sentence, and it is occasionally the thing that makes a project work.
What a renovation loan is like to live through.
This is the part that decides whether the loan suits you, and it gets less attention than the limits do.
There is no separate construction loan
The renovation funds are part of your mortgage from day one. They sit in an escrow account held by the lender and are released to the contractor as work is completed and inspected. One closing, one note, one lender, and no take-out refinance at the end. That is the structural reason a renovation loan is a simpler transaction than a ground-up build.
The appraisal is done on plans, not on the house
The appraiser values the property subject to completion per plans and specifications. So the plans and specifications have to exist, in writing, before the appraisal — describing the full scope with start and completion dates. This is the step that most often sets the timeline, because it depends on your contractor rather than on the lender.
Your contractor becomes part of the file
All work must be performed by a licensed contractor or subcontractor, unless licensing is not required by state or local law, and the lender reviews both the contractor and the contract. If you can, choose someone who has done a renovation-loan job before. The draw paperwork is unfamiliar to contractors who have not, and that friction lands on your timeline rather than theirs.
You can do some of it yourself
Self-help work is permitted on one-unit properties, capped at 10% of the as-completed value, with the lender inspecting the completion of every item costing more than $5,000. For a capable owner that is real money.
There is a deadline
Work must be complete within 15 months of closing. That is generous until a permit stalls or a supplier is slow. Ask the contractor for a written schedule before closing rather than after.
What I cannot tell you from a guideline. The number of draws, the size of the contingency reserve, the per-draw inspection fee and whether you can act as your own general contractor are set by the lender and the investor, not by published agency rules. So if you are given an industry-standard contingency percentage, it is somebody’s overlay rather than a rule. Ask whose it is — and ask me the same question.
Two products, side by side.
| HomeStyle | 203(k) | |
|---|---|---|
| Agency | Fannie Mae | FHA |
| Time to complete | 15 months | 9–12 months |
| Pools and luxury items | Yes | No |
| Investment property | Yes, 1 unit | No |
| Owner self-help work | Yes, to 10% | Limited |
| Consultant required | No | Standard only |
| Mortgage insurance | Cancellable | Often for life |
| Do I write it | Yes | No |
HomeStyle also works on a one-unit second home or investment property, which 203(k) cannot do at all. It allows a purchase or a limited cash-out refinance — you cannot take cash out of the transaction beyond the renovation escrow.
FHA 203(k), which I do not originate
The Limited 203(k) caps total rehabilitation cost at $75,000, a figure HUD raised in late 2024 and reviews annually alongside the loan limits. Work must finish within nine months, a consultant is optional, and the consultant fee can be financed. The Standard 203(k) handles larger projects, requires a consultant, and allows twelve months.
Where 203(k) genuinely wins is credit. If your score or your debt-to-income will not support a conventional renovation loan, FHA underwriting is more forgiving, and a loan you can get beats a loan you cannot. Where it loses is the mortgage insurance, which generally does not come off, and the exclusions — no pools, no luxury items, no investment property.
I do not write 203(k). If it is your best route I will tell you so and point you to someone who runs them regularly.
Four numbers, in this order.
- Is the dwelling staying? If it is coming down, this is a construction loan and the decisions are different ones.
- Today’s value against the budget. If the equity is already there, price a second lien first. It is cheaper and simpler, and it is often the right answer.
- Three times the purchase price. On a purchase that is your renovation ceiling, or 75% of the as-completed value if that is lower. Run it before the offer.
- Fifteen months against your contractor’s real schedule. In writing, before closing.
To run the second-lien route against a renovation refinance on your own numbers, the blended-rate calculator gives you the true weighted cost of each path.
Send me three numbers and I will run the limits.
Purchase price or current value, renovation budget, and what you think the house is worth finished. That is enough to tell you which product fits, whether the budget clears the cap, and whether a second lien would be cheaper.
Talk First
Text or email the three numbers and a sentence about the scope. If the arithmetic does not work, I would rather tell you today than in week five. One business day.
Or Get Real Numbers
Send the full scenario and I will come back with the maximum renovation budget, the payment, and the second-lien comparison beside it.
Send my scenario →Program requirements are drawn from agency selling guide sections on renovation mortgages and from HUD Mortgagee Letter 2024-13, current as of July 2026. The three-times formulation is the algebraic solution of the published purchase limit and is offered as a check, not as a substitute for the guideline. Examples are illustrative; the HELOC and second-lien averages cited were verified in July 2026 and change. Draw counts, contingency reserves and owner-builder eligibility are lender and investor overlays rather than published guidelines. Your actual terms depend on credit, property, occupancy, program and investor. Forest Hills Mortgage · Matt Mergo · NMLS #563819. Equal Housing Opportunity.