Change Orders on a Fix and Flip: How to Control Rehab Overruns

A change order on a fix and flip is a written, priced and signed change to the rehab scope, cost or schedule, and the way to control overruns is to approve each one in writing before the work happens and to pay for it from a funded contingency, not from the profit. Overruns rarely come from one big mistake; they come from several small "while we are in there" decisions that nobody priced.

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This guide is for investors using short-term rehab financing. It covers what causes overruns, how to run a clean change order, how changes interact with draws, and what to do when the numbers no longer work. For the budget itself, start with how to build a rehab budget lenders approve.

Key takeaways

• No work starts on a change until it is written down, priced (labor, materials, schedule) and signed by you and the contractor.
• Pay for changes from a cash contingency. Every added dollar of scope is also a dollar of holding-cost exposure if it adds days.
• Tell your lender before a change moves the budget or schedule; draws are released against the approved budget.
• Test each change against the after-repair value: if it does not raise ARV or protect the sale, it is a cost, not an investment.
• Older homes carry unknowns. Pre-1978 homes also trigger federal lead-safe work rules that can change both cost and schedule.

What causes rehab cost overruns on a flip?

Most overruns trace back to scope that was never defined, conditions nobody could see, or decisions made on the job site without a price. The usual causes are:

• Vague scope. A bid that says "kitchen remodel" without cabinet, counter, appliance and plumbing allowances leaves every choice open to an add-on.
• Hidden conditions. Rot behind a shower, old wiring, a failed sewer lateral or foundation movement that appears once walls are open.
• Owner upgrades. Switching finishes or adding square footage mid-job, usually because the numbers on paper looked better than the room feels.
• Permit and inspection findings. A reviewer requires a code fix that was not in the plan. See financing properties with code violations.
• Sequencing errors. Flooring installed before paint, or a trade scheduled before the rough-in passes, creates rework you pay twice for.
• Weak contractor control. No weekly budget-versus-actual review means you learn about the overrun at the final invoice.

How do you run a change order properly?

Use a short, repeatable process, and do not skip a step because the change looks small.

1. Describe it. What is changing, where, and why (hidden condition, code requirement or your upgrade).
2. Price it. Labor, materials, any permit fee, and the schedule impact in days.
3. Test it. Does it raise the ARV supported by comparable sales? See how to calculate ARV. If not, can it wait or be dropped?
4. Source the money. Name the budget line it comes from: contingency, a savings elsewhere, or new cash.
5. Approve in writing. You and the contractor sign before the work begins, and a copy goes into the project file.
6. Update the budget and schedule. The tracking sheet should always show original budget, approved changes, spent and remaining.

Your contractor agreement should say that changes are not payable unless signed. Some states regulate this for home improvement contracts, so check your state's contractor licensing board or ask your attorney before relying on an informal text message.

How do change orders affect hard money draws?

Draws are released against an approved budget and inspected progress, so a change that is not reflected in the budget can slow the next release. Typically, the lender or its inspector compares completed work to the approved scope; if the work on site differs from the plan, expect questions before funds move.

Practical steps: send the lender the signed change order, the revised budget and the revised schedule at the same time; keep photos and invoices matched to budget lines; and do not assume an added scope item will be funded. Fix and flip financing at Ambition Lending is up to 90% of purchase plus 100% of rehab, capped at 75% of ARV, so scope that increases cost without increasing value pushes against that cap and your cash comes into play. The mechanics of releases are explained in how hard money draw schedules work.

How much does an overrun really cost? A hypothetical example

The figures below are hypothetical and for illustration only. They show that an overrun costs more than the invoice, because added weeks also add interest and carrying costs.

In this example the three changes, which looked like roughly $9,500 of work, reduced profit by about $12,100 once four extra weeks of carrying costs were counted. If a $10,000 contingency had been funded, the first $9,500 would be absorbed; the extra carrying cost would still need to come from somewhere. Use the fix and flip calculator to rerun your own deal with a longer schedule and higher rehab cost, and read how holding costs erode flip profit for what to include.

Do older houses change the rules?

Yes. The EPA's Renovation, Repair and Painting (RRP) program applies to paid work that disturbs painted surfaces in housing built before 1978, and EPA states that it covers people who buy, renovate and sell homes for profit. Firms doing this work must be EPA lead-safe certified, and workers must be trained in lead-safe practices (EPA, Renovation, Repair and Painting Program; rule text at 40 CFR Part 745, Subpart E).

For a flipper the practical lesson is to price lead-safe practices into the original bid and to hire only a certified firm for pre-1978 houses. An uncertified contractor who is discovered mid-project is a change order you did not plan for, and possibly a compliance problem that is yours as well.

What should you do when the budget no longer works?

Stop adding scope, then re-underwrite the deal with real numbers rather than hope. Rebuild the budget with approved changes, update the schedule and rerun your profit using realistic sale and holding assumptions. Then choose among a few options:

• Cut scope on items that do not move ARV, such as upgraded fixtures beyond neighborhood comparables.
• Re-bid remaining trades; once demolition is done, scope is clearer and quotes are sharper.
• Add cash if the finished product still pencils out and the lender-approved structure remains workable.
• Talk to your lender early if the schedule may pass maturity. Waiting until the last week limits options; see hard money extension strategy.
• Plan a different exit such as renting and refinancing if the sale price has softened. See when to refinance from hard money into a DSCR loan.

When your project is more of a ground-up build than a rehab, review new construction loans, where budgets and draws follow a more formal construction process.

How can you prevent overruns before they start?

• Get at least two itemized bids, with allowances for finishes, not lump sums.
• Walk the property with the contractor before closing, open what can be opened, and photograph it.
• Carry a cash contingency separate from the loan's rehab holdback, sized to the age and condition of the house.
• Schedule long-lead items (windows, cabinets, electrical panels) at the start.
• Review budget against actual every week, not at draw time.
• Set a rule for yourself: no unpriced upgrade, no matter how small.

Ambition Lending provides fix and flip financing for business-purpose loans from $100,000 with no fixed maximum, with a term sheet within 24 hours on most requests. Typical pricing is 8 to 12% interest and 2 to 4 points; see fix and flip loans for the program.

Frequently asked questions

What is a change order on a fix and flip?

A change order is a written, priced and signed amendment to the rehab scope, cost or schedule after the contractor agreement is in place. Without the writing, it is only an informal request that can turn into a dispute or a draw problem.

How much contingency should a flip budget carry?

There is no universal figure, so set it by the house: older homes with unknowns behind walls, plumbing or roofs need a larger cushion than a cosmetic refresh of a newer one. Many investors hold a percentage of the rehab budget in reserve; whatever you choose, make sure it is funded in cash and not assumed.

Does a lender have to approve every change order?

Not necessarily every small one, but changes that move the budget total, shift money between major categories or extend the schedule should go to the lender before the work is done. Ask your lender how it wants changes submitted, because draw releases are tied to the approved budget.

Who pays when a rehab goes over budget?

The borrower pays. A hard money loan funds the approved rehab budget, so overruns beyond it come from your reserves or from savings elsewhere in the budget. Ambition Lending's fix and flip structure is up to 90% of purchase plus 100% of rehab, capped at 75% of ARV, so added scope that does not raise ARV erodes your margin directly.

Do I need lead-safe work practices on a flip?

If the house was built before 1978 and a paid contractor disturbs painted surfaces, the EPA Renovation, Repair and Painting rule generally applies, and EPA says it covers people who buy, renovate and sell homes for profit. Firms must be EPA lead-safe certified, so confirm your contractor's certification before you sign.