Remodeling in Frederick
Frederick County is mostly newer houses around an old town: 51%1 of its homes were built in 1990 or later, in subdivisions and townhouse rows spreading out from the city's historic downtown. The county issues permits everywhere except the City of Frederick and Mt. Airy, which run their own.

Guides for Frederick
- Bathroom remodelingMidrange bathroom remodel: $25,9362
What a bathroom remodel costs around Frederick, why most homes here date from 1990 on, and whether Frederick County or the city issues your permits.
- Kitchen remodelingMinor kitchen remodel: $27,3082
What a kitchen remodel costs around Frederick, why so many homes here run on electricity, and which county or city permits cover wiring, gas and the hood.
- Whole-home remodelingMajor kitchen remodel: $79,9882
What the rooms in a full renovation cost in the Washington market, how Frederick County's mix of new and old houses shapes the job, and who reviews the permits.
- Accessible bathroomsUniversal-design bathroom remodel: $41,8322
What a universal-design bath costs in the Washington market, how many older owners Frederick County has, and the county grant and state help that can pay for one.
- Basement finishingBasement remodel: $52,7572
What a finished basement costs in the Washington market, how rain and cold differ across Frederick County, and what the county's basement permit checklist asks for.
- Rental conversionsAccessory dwelling unit (new detached build): $164,6342
What an accessory unit costs in the Washington market, how Frederick County and the City of Frederick each regulate one, and what renters here pay.
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Sources
- U.S. Census Bureau, American Community Survey 2020–2024 5-year, table B25034. Released January 29, 2026. Frederick County, MD.
- Zonda / Journal of Light Construction, Cost vs. Value 2025, Washington, DC. Released 2025. Washington, DC. Industry source.