Number 1: Smit House
on GoogleCockeysville, MD
This contractor builds home additions for homeowners in Cockeysville, Maryland.
(410) 329-1262 232 Cockeysville Rd b200, Cockeysville, MD 21030
Home addition contractors in Baltimore
The 10 home addition contractors from Google's results for Baltimore, Maryland, ordered by Google rating weighted by review count. No firm pays to be listed or ranked.
Last updated
- Bump-out
- $24,500 – $59,000small single-room extension
- Room addition
- $78,500 – $196,000ground floor, finished
- Second-story addition
- $147,000 – $392,000whole or partial floor
- Baltimore vs US
- -2%around the US median
Licensing in Maryland. Maryland requires a Maryland Home Improvement Commission (MHIC) license for home improvement work.
Number 2: Lynch Design Build
on GoogleChurchville, MD
From Churchville, Lynch Design Build works as a design-build firm in Maryland, Pennsylvania and Delaware. It builds home additions and custom homes and remodels kitchens, bathrooms and master suites, along with whole-house renovations, outdoor living spaces and specialty projects.
(410) 879-5510 20 Carico Ln, Churchville, MD 21028
Number 3: Home Additions in Baltimore & Towson MD
on GoogleBaltimore
Total Craftsmen is a bathroom remodeling and home addition contractor serving Towson and the Baltimore area.
Number 4: Home Remodeling and Renovating in Greater Baltimore, MD
on GoogleReisterstown, MD
A-1 Renovations is a Reisterstown general remodeling contractor serving Greater Baltimore and Baltimore County. Projects run from single-room updates to full-home renovations, with kitchens, bathrooms, basements and home additions among its main trades.
(443) 622-1926 18 Blacksmith Ct, Reisterstown, MD 21136
Number 5: Design Build Remodeling Group
on GoogleBaltimore
Design Build Remodeling Group takes on kitchen remodels, home additions and accessory dwelling units in Baltimore.
Number 6: Schwing Homes
on GoogleCatonsville, MD
Schwing Homes builds home additions in Catonsville and across Baltimore County and Howard County, including Ellicott City, Elkridge, Arbutus and Columbia. Projects add room for growing families or relatives moving in, and the company manages the budget, planning and project oversight.
(410) 960-4132 406 Patleigh Rd, Catonsville, MD 21228
Number 7: ADDITIONS & REMODELS
on GoogleBaltimore, MD
One Source Contracting renovates and remodels homes in Maryland from its Baltimore base. The company focuses on custom home renovations and remodels, working closely with clients from the first meeting through the final walkthrough.
(443) 449-7395 1711 Aliceanna St, Baltimore, MD 21231
Number 8: Cossentino
on GoogleColumbia, MD
Cossentino and Sons designs and builds home additions in Howard County, Baltimore and elsewhere in Maryland, including new kitchens and bathrooms. Projects start with a kickoff meeting on scope and budget range, then move to design with the firm's architect and a detailed contract proposal before construction.
(410) 442-0000 8775 Centre Park Dr #659, Columbia, MD 21045
Number 9: Dys Construction
on GoogleBaltimore, MD
Dys Construction takes on kitchen remodels and home additions in Baltimore, Maryland.
(410) 617-0268 5900 Winner Ave, Baltimore, MD 21215
Number 10: Second-Story Addition Contractors in Baltimore
on GoogleCockeysville, MD
This Cockeysville, Maryland design-build firm takes on second-story additions and other home additions in the Baltimore area.
(443) 823-9759 10766 York Rd, Cockeysville, MD 21030
What home addition contractors charge in Baltimore
In Baltimore, a bump-out typically costs $24,500 – $59,000. Remodeling labor in Baltimore runs about 2% below the US median, which accounts for most of the difference from the same project elsewhere.
How to choose between them
- Check the license yourself. Where Maryland or Baltimore licenses this work, the licensing board's own lookup confirms a license number in a minute. Do it before you sign, not after.
- Get three bids on the same scope. Written down, split into labor, materials, allowances and anything structural. Most people compare a total against a total and end up choosing between two different projects.
- Ask what is not included. Permits, debris removal, fixture and finish allowances, and repairs after demolition are the four that turn a cheap bid into an average one.
- Never pay a large deposit up front. A deposit to order materials and hold a start date is normal. Half the total before anyone shows up is not.
How this list is ordered
These are the firms from Google's results for "home additions baltimore", with directories, chains and suppliers removed. They are ordered by Google rating weighted by review count, and the ratings shown are Google's. No firm pays to be listed or ranked. The list was last updated in October 2026.
Home addition contractors in Baltimore: common questions
Do I need an architect for a home addition?
Usually yes, or a design-build firm with in-house design. Additions need stamped structural drawings for the permit in most places, and zoning review on setbacks, height and lot coverage.