Permit Costs by Project: What We've Paid Across Five Flips

October 16, 2026 · Real renovation and flip numbers, start to finish

Generated (Gemini), via Wikimedia Commons

If you're trying to budget for permits, there isn't one number that works. Across five flips in three different counties, our permit costs have ranged from under $150 for a water heater swap to over $4,000 for a kitchen remodel that needed a structural wall change and an engineer's letter. The project type matters, but it's not the biggest factor. The biggest factor is where you're doing the work.

Decide this first

Before you budget a single dollar for permits, pull up your local building department's fee schedule. Every city and county sets its own rates, and they are not close to each other. One county we've worked in charges a flat $75 for a bathroom plumbing permit. Another calculates fees as a percentage of declared job valuation, so the same bathroom remodel can run $300 or $600 depending on what number you put on the application. Skip this step and every other number in this post is just a loose reference point, not a budget line.

What to look for

Typical permit costs by project type (ranges, not quotes)

These are the ranges we've actually seen across five flips, not national averages pulled from a spreadsheet. Your local numbers will differ, sometimes by a lot, but this gives you a sense of scale.

• Water heater replacement: $50 to $200, usually a flat mechanical permit fee
• Electrical panel upgrade: $150 to $450, often flat, sometimes tied to amperage
• Full bathroom remodel (plumbing and electrical): $200 to $700
• Kitchen remodel, no structural changes: $300 to $900
• Kitchen remodel with a load-bearing wall removed: $800 to $2,500, plus engineering review fees that aren't always included in the permit line itself
• Re-roof: $100 to $400
• HVAC system replacement: $100 to $350
• Window replacement, multiple units: $100 to $400
• Deck or porch addition: $150 to $600
• Room addition or square footage increase: $1,500 to $5,000 or more, almost always valuation-based

Notice how wide these ranges are. That's not sloppiness, it's the reality of permit fees varying by jurisdiction more than by scope.

Valuation-based fees versus flat fees

Some departments charge a flat fee per permit type regardless of job cost. Others calculate fees as a sliding percentage of the declared construction value, something like $10 to $25 per $1,000 of valuation, with the rate dropping as the job gets bigger. If your jurisdiction uses valuation-based fees, the permit office will usually want a cost breakdown or a contractor bid to back up the number you declare. Lowballing the valuation to save on fees is a bad habit. Inspectors have seen every version of it, and a mismatch between your stated valuation and the visible scope of work can trigger extra scrutiny.

How many separate permits the job actually needs

A kitchen remodel sounds like one project, but it can generate three or four separate permits: building, electrical, plumbing, and mechanical if you're moving a range hood or adding a dishwasher line. Each one has its own fee, and some jurisdictions also charge a plan review fee on top of the permit fee itself, usually 25% to 65% of the permit cost, charged before the permit is even issued. On paper a kitchen remodel might show a $400 permit fee, but once you add plan review and the electrical and plumbing sub-permits, the real total is closer to $900. This is the single most common place where flippers underbudget.

What to ignore

Online permit cost calculators that promise a number for your zip code are mostly noise. They're built from scraped averages and rarely match what your specific department charges this year. Contractor bids that list "permits" as a flat allowance, often something round like $500, are also worth questioning. Ask the contractor to show you the actual fee schedule line items they're estimating from, not a round number they've used on every job for the last five years. Fees change, sometimes annually, and a contractor's gut-feel number from an old job isn't a quote.

Also ignore anecdotes from forums about what permits cost "in general." A post from someone in a different state telling you their kitchen permit was $150 tells you nothing about your county. Permit costs are local in a way that most renovation costs aren't.

Common mistakes

The most expensive mistake we've seen is treating the contractor's permit allowance as the real number and moving on. On one flip the general allowance covered the building permit but not the separate electrical sub-permit for a new circuit, which showed up as a surprise line item mid-project. It wasn't a huge number, a couple hundred dollars, but it came at a point in the project where every unplanned cost felt bigger than it was.

The second mistake is skipping permits altogether to save money and time, usually on smaller jobs like a water heater or a deck. This works right up until the house goes on the market and an appraiser or buyer's inspector notices unpermitted work. At that point you're either disclosing it, which can scare off buyers or trigger a price reduction, or pulling a retroactive permit, which usually costs more than the original permit would have and sometimes requires opening up finished work for inspection. The money saved upfront gets paid back with interest.

The third mistake is forgetting re-inspection fees. Most permits include the first inspection in the fee, but if you fail an inspection, which happens more often than people expect on older houses, the re-inspection fee is extra. We've seen these run $50 to $150 per visit. On a project with three failed rough-in inspections across electrical, plumbing, and framing, that's an unplanned few hundred dollars that never shows up in anyone's original budget.

FAQ

Can I pull my own permits as a homeowner instead of having the contractor do it?

In most jurisdictions, yes, if you're the owner-occupant or in some cases the owner of record on an investment property, though rules vary by state. Pulling your own permits can save the contractor's markup on permit handling, often 10% to 20% of the fee, but it also puts the inspection scheduling and compliance on you. If you're not comfortable reading inspection notes and scheduling re-inspections, this isn't the place to save money.

What actually happens if you skip permits on a flip?

Nothing happens immediately, which is exactly why people do it. The risk shows up later: at sale, when a buyer's inspector flags unpermitted electrical or plumbing work, or when an appraiser notes it and the lender won't finance against unpermitted square footage. Insurance can also be an issue, since some policies exclude damage related to unpermitted work. The fix at that point, a retroactive permit with inspection of completed work, usually costs more and takes longer than doing it right the first time.

If you're tracking real numbers across your own projects, it's worth keeping a simple running log by jurisdiction and project type. That's effectively what we do here at Fixer Files, and it's the only way we've found to budget permits accurately instead of guessing.