Additions
Home additions in Baltimore County
Get matched with a licensed addition contractor serving Towson, Catonsville, Timonium, Perry Hall and the rest of the county, at no cost to you.
Representative photo
Representative photo
Representative photoWhat our partner contractors handle
Room additions and bump-outs
Second-story additions
In-law and accessory suites
Design and engineering coordination
Foundations, framing and roofing
Permits through Baltimore County
Permits for additions in Baltimore County
Additions need a building permit from Baltimore County's Department of Permits, Approvals and Inspections (PAI). Sealed plans from a Maryland-licensed design professional are required for additions of 600 square feet or more, new bedrooms, second-floor additions and structural work, along with a 2021 energy code form.
Landmark and historic-district properties need a Certificate of Appropriateness from the Landmarks Preservation Commission, and floodplain lots need two elevation certificates from a licensed surveyor.
More in our Baltimore County permit guide. Towns we cover: Towson · Catonsville · Arbutus · Timonium and Lutherville · Perry Hall · Parkville.
What to expect
Match
We review your request and connect you with the partner who fits your scope and location.
Site visit and quote
The contractor measures, talks through options and gives you a written proposal.
Contract and build
You sign directly with the contractor. Maryland law caps the deposit at one-third of the contract price at signing.
Common questions
Who actually does the work?
An independently owned contractor licensed by the Maryland Home Improvement Commission. TBG makes the introduction; it does not perform or sell the work.
Does it cost me anything?
No. Matching is free to homeowners. TBG is paid by its partner contractors.
How do I check a contractor's license?
Every partner shows their MHIC number, which you can look up on the Maryland Department of Labor site. Contractors must also show it on their contracts, trucks and ads.
What happens after I submit?
We review your request and connect you with one partner who covers your area and your type of project. They contact you to schedule a site visit and a written quote.
See projects by size and scope →
Plan with our local guides
The Baltimore County rules and choices that most often change additions projects.
Other projects
Kitchen remodels · Bathroom remodels · Basement finishing · New custom homes · Decks & exteriors
Additions in other counties: Anne Arundel County · Howard County