Free permit & build-cost tools
Every tool runs in your browser — no sign-up and nothing leaves your device. Each one hands you the next step in the build decision instead of stopping at a number.
Permit checker (go / no-go)
Answer four questions about your project and state to see whether a permit is required, with the agency and code that says so.
CalculatorPermit fee estimator
Turn the project type and valuation into a typical municipal permit fee range for your jurisdiction.
CalculatorContractor quote analyzer
Benchmark a contractor's bid against regional cost ranges, flag inflated line items, and print a negotiation script.
GeneratorHome warranty appeal tool
Pick the denial reason to get a counter-argument, an evidence checklist, a printable demand letter and the right state regulator.
CalculatorADU cost calculator
Estimate the all-in cost of an accessory dwelling unit by type, floor area, state and finish level.
CalculatorADU rental ROI
Model rent, operating costs and financing into annual cash flow, payback years and 20-year cumulative return.
ComparisonADU financing comparison
HELOC vs construction loan vs home equity loan vs cash, on example rates and standard amortization.
ReferencePermit comparison matrix
16 project types across 20 states in one grid, with the requirement and go / no-go for each cell.
Decision treeHOA vs city approval
Work out which approval has to come first — HOA architectural review or the municipal permit.
ComparisonRenovate vs add on
Compare the permit path, cost and value of renovating what you have against building an addition.
PrintablePre-construction checklist
The documents, sign-offs and inspections to line up before work starts, in order.
DatasetPermit fees by state
The state-level fee ranges underlying the estimator, with the published schedules cited.
All results are planning aids, not bids, quotes or legal advice. Confirm requirements, fees and licensing with the authority that issues your permit.