Home Additions
Home Additions in Baltimore, MD
Expand your living space with a seamlessly integrated addition — sunrooms, master suites, in-law suites, and more.
From $80,000
Get a Free Addition EstimateOur Process
Feasibility Consultation
Free site assessment reviewing lot size, setback requirements, foundation condition, utility connections, and zoning restrictions specific to your jurisdiction.
Architectural Design
Working with licensed architects and structural engineers to create plans that integrate seamlessly — matching rooflines, siding, window proportions, and interior trim. Full 3D renderings.
Permitting & HOA Approval
Full permit package submitted to your local jurisdiction. For HOA communities like Columbia and Clarksville, we prepare architectural review applications on your behalf.
Construction Phases
Site prep, foundation, framing, roofing, mechanical rough-in, insulation, drywall, and finishes. Your home remains weatherproofed and livable throughout the build.
Integration & Walkthrough
Matching flooring, trim, and paint between old and new. HVAC balanced for consistent comfort. Comprehensive walkthrough covering every surface and system.
Frequently Asked Questions
How much does a home addition cost in Baltimore, MD?
Home addition costs typically range from $200 to $400 per square foot. A 200-sq-ft sunroom starts around $50,000-$80,000. A 500-sq-ft master suite runs $100,000-$200,000. Two-story additions can range from $150,000-$350,000+. Foundation type, structural requirements, and finishes are the primary cost drivers.
How long does it take to build a home addition?
A single-room bump-out takes 8-12 weeks from permit approval. A full first-floor addition with bathroom runs 12-16 weeks. A two-story addition can take 16-24 weeks. The permitting process adds 4-8 weeks before construction begins.
What permits do I need for a home addition in Maryland?
Every home addition requires a building permit, plus electrical, plumbing, mechanical, and sometimes grading permits. In Baltimore City historic districts, CHAP approval is required. ADP Remodeling manages the entire permitting process from plan submission through every required inspection.
Can I stay in my home during construction?
Yes. ADP Remodeling designs the construction sequence to maintain your home's livability. We install temporary weather barriers, maintain functioning systems, and contain dust with barriers. Most clients in Towson, Ellicott City, and Columbia remain in their homes throughout the build.
What types of home additions add the most value?
First-floor master suites and family room additions deliver the strongest resale returns at 50-65%. In-law suites with separate entrances are increasingly valuable for multigenerational living. The key is designing an addition that addresses a genuine functional gap in your floor plan.
Ready to Add More Space?
A home addition is one of the highest-ROI investments you can make. Schedule a free consultation to explore your options.