Home Addition Contractor in Maryland
Expert home addition contractor in Maryland. Coalition Construction builds room additions, in-law suites & expansions in Anne Arundel County. Call (410) 431-1892.
Trusted Home Extension Contractor in Maryland
When your family has outgrown your current home but you love your neighborhood, your school district, and your community — a custom home addition is the smart alternative to moving. Coalition Construction is a trusted home addition contractor serving Anne Arundel County and surrounding Maryland communities, building thoughtfully designed, expertly constructed additions that expand your space without disrupting the character of your home.
From single-room additions and master suite expansions to full second-story builds and in-law apartment additions, Coalition Construction handles every type of home addition project with the same level of care, craftsmanship, and project discipline. Once your new space is framed and sealed, our expertise as an interior remodeling contractor takes over to create beautiful, finished living areas that flow seamlessly with your existing home. We manage every phase from initial design and permitting through construction and final inspection — so you have one trusted point of contact from start to finish.
Types of Home Additions We Build in Maryland
- Primary bedroom and master suite additions
- In-law suites and multigenerational living additions with private entrances
- Kitchen expansions and breakfast room additions
- Family room and living room additions
- Sunrooms and four-season room conversions
- Second-story additions over existing structures
- Garage additions and attached garage conversions
- Mudrooms, laundry rooms, and utility additions
- Office additions with exterior access
- Bump-out additions for kitchen or bathroom expansion
Our Home Addition Process
We visit your property, assess structural and zoning feasibility, and discuss your vision
We coordinate design drawings and any required structural engineering
Coalition Construction manages all county permits and HOA approvals as needed
We prepare the site and build a proper foundation for your addition
Expert framing that integrates seamlessly with your existing structure
Electrical, HVAC extension, and plumbing rough-in as applicable
Interior finishing to match or complement your existing home
County inspection sign-off and your complete satisfaction review
Why Build Instead of Move in Maryland?
Maryland’s real estate market — particularly in Anne Arundel County — remains competitive and expensive. The cost of selling your current home, paying real estate commissions, purchasing a larger property, and covering moving expenses can easily exceed the cost of a well-planned addition. For multigenerational families, building an in-law suite also allows loved ones to stay close while maintaining independence, which is why we often incorporate aging in place design principles into these projects. Beyond cost, a custom addition lets you stay in the neighborhood you love while getting exactly the space configuration your family needs.
Home Addition Cost in Maryland
- Small room additions and bump-outs: $45,000 – $80,000
- Full room additions (bedroom, family room): $65,000 – $120,000
- Master suite additions: $80,000 – $150,000
- Second-story additions: $150,000+
Every project begins with a free, written estimate. Contact Coalition Construction at (410) 431-1892.
FAQs
Most home additions in Maryland take between 3 and 6 months from permit approval to completion. Simple room additions may be completed in 8–12 weeks. Second-story additions and complex structural projects take longer. We provide a firm schedule at the outset of every project.
Yes. We design every addition to complement your home's existing roofline, exterior cladding, window style, and architectural character. The goal is always a seamless result that looks like it was part of the original design.
All home additions require building permits in Maryland. Coalition Construction handles the entire permit application, county review, and final inspection process on your behalf.
Contact Us
- Phone: (410) 431-1892
- Email: coalitionllcmd@gmail.com
Call now for a FREE estimate — no obligation, no pressure!
Service Areas
- Home Additions in Pasadena, MD
- Home Additions in Severna Park, MD
- Home Additions in Arnold, MD
- Home Additions in Annapolis, MD
- Home Additions in Davidsonville, MD