Looking for a basement contractor in Baltimore, MD? Describe your project once and up to three basement contractors who work in Baltimore and Baltimore city get back to you with a quote. It's free and there is no obligation.
Baltimore is home to about 568,271 people (2024 Census Bureau estimate), a shrinking community (−3.0% since 2020). With 7,020 people per sq mi, it is a densely built-up area. Full basements are common here and often the cheapest way to add living space.
Baltimore at a glance
- Population (Census Bureau estimate, 2024)
- 568,271 (−3.0% since 2020)
- Rank in Maryland
- 1st of 157 cities and towns
- Land area
- 81 sq mi
- Population density
- 7,020 people per sq mi (densely built-up)
- Type
- City (Baltimore city)
- Main county
- Baltimore city
What to check before hiring in Baltimore
- Moisture first: waterproof before finishing.
- Egress: in Maryland, a basement bedroom needs an escape opening.
- Radon: test before you finish.
- Price drivers: size, bathroom, ceiling height, finishes and egress.
Useful official resources
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ICC: International Code Council
Official information and guidance.
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EPA: radon
Official information and guidance.
Services available in Baltimore
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Basement finishing
Framing, insulation, electrical, drywall and flooring of a basement, with permit.
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Basement bathroom or rental unit
Bathroom, kitchenette or legal basement unit with egress and plumbing.
Frequently asked questions in Baltimore
How much does basement finishing cost in Baltimore, MD?
It depends on size, bathroom and finishes. Describe your basement: contractors who serve Baltimore reply with a quote.
How long does it take?
Often several weeks.
Can I rent it out?
Only if local rules allow an accessory unit; check zoning.
Which basement contractors will contact me?
Up to three independent basement contractors who serve Baltimore and the surrounding area, chosen for the service you need. Your details are shared only with your consent.
Source: U.S. Census Bureau, Population Estimates Program (Vintage 2024) and Gazetteer Files (public domain), imported on 10/31/2026. Figures describe the incorporated place or county as published; they are shown for information only.