What Are Maryland Impact Fees?
Maryland counties levy development impact fees and building excise taxes under county-specific enabling authority granted by the General Assembly or charter home rule — Montgomery County's transportation and school impact taxes being the best known. WSSC and county utilities add substantial water and sewer connection charges.
School and transportation charges are the defining Maryland line items, with several counties charging $20,000+ per single-family home. Maryland figures on impactfees.org are model estimates for early feasibility; county schedules update annually, so verify current rates.
Maryland figures are illustrative estimates from our statewide cost model — calibrated to local construction costs and community size — rather than verified fee schedules. Use them for early budgeting and site comparison, and see our methodology for how estimates are built.
Counties Covered
Our calculator covers all 24 Maryland counties:
Click any county to open the calculator pre-loaded with that jurisdiction.
Major Maryland Markets
Click any market to open the calculator pre-loaded with that city.
Rockville & Gaithersburg / Montgomery
Transportation and school impact taxes are among the state's highest.
Frederick / Frederick
Growth corridor with school and road impact fees on new homes.
Annapolis / Anne Arundel
County impact fees span schools, roads, and public safety.
Waldorf / Charles
School excise charges shape southern Maryland budgets.
Baltimore / Baltimore City & County
Utility connection charges dominate; impact fees vary by county.
How the Calculator Works
- Pick your development type — Single-family, multifamily, commercial, industrial, or office.
- Search or pin your site — Enter an address or drop a pin anywhere in Maryland.
- We identify the jurisdiction — City, county, and state are resolved automatically.
- Get an instant breakdown — Water, sewer, road, park, school, and fire fees by category — verified where researched, clearly-labeled estimates where not.