Estimating additions and ADUs in Baltimore, MD
Prices for additions and ADUs in Baltimore, MD, how they compare with the national median and what to know when bidding here, for remodeling contractors.
Start your 30-day free trial
No contract. No setup fees. Cancel anytime.
Room addition prices in Baltimore
Q4 2026 pricing. Ranges are rounded to the nearest $50, or $100 from $5,000 up.
1 story over a basement
$45,500 to $300,800
150 to 1,000 square feet
National median: $45,700 to $302,100.
2 story over a basement
$69,000 to $462,200
150 to 1,000 square feet
National median: $69,300 to $464,400.
How Baltimore compares
Across the work in the cost data, Baltimore prices run about the national median.
More work in Baltimore
- Kitchen remodelsCabinets, countertops, appliances and finishes.
- Bathroom remodelsTile, fixtures, vanities and plumbing rough-ins.
- GaragesOne and two car garages, framed and sided.
- Decks and porchesFraming, decking, railings and stairs.
- PaintingInterior and exterior, by surface area and substrate.
- Electrical workService upgrades, rough-ins, fixtures and finish work.
- All of Baltimore, MDEvery category, against the national median.
- Additions and ADUs nationallyNational ranges, cost drivers and the estimate's structure.
Estimate additions and ADUs with Baltimore prices
No contract. No setup fees. Cancel anytime.