Home Additions in Richmond, VA
Add the space your family needs without the cost and stress of moving.
Why Choose MAS Contractors?
When your family outgrows your home, a custom addition is often the smartest investment you can make. MAS Contractors LLC designs and builds home additions across Richmond, North Chesterfield, and surrounding areas that blend seamlessly with your existing structure — matching rooflines, siding, windows, and interior finishes.
From master suite additions and expanded kitchens to sunrooms, in-law suites, and second-story additions, we manage the entire process: architectural coordination, city permits, foundation, framing, MEP rough-ins, insulation, drywall, and finish work. One team, one point of contact, zero surprises.
- Master bedroom & suite additions
- In-law suite & ADU construction
- Sunroom & four-season room additions
- Garage conversions & expansions
- Second-story additions
- Full permit management (no city office trips)
- Foundation, framing & structural work
- Seamless exterior matching (siding, roofline, windows)
Our Process
Site Assessment & Planning
We visit your property, assess structural and zoning requirements, and coordinate with your architect or designer on the addition layout.
Permits & Engineering
We submit permit applications and coordinate with engineers as required. We track approval status and adjust scheduling accordingly.
Foundation, Framing & Rough-In
Structural work, framing, and all MEP (mechanical, electrical, plumbing) rough-ins completed and inspected at each phase.
Insulation, Drywall & Finish
From rough shell to finished space — insulation, drywall, trim, flooring, paint, and a complete final punch-list walkthrough.
11+
Years of Experience
500+
Projects Completed
100%
Satisfaction Rate
Always
Free Estimate
Cost & Timeline Guide
$25,000 – $150,000+
Most projects: $40,000 – $90,000
8 – 24 weeks
Permit approval times may add 2–4 weeks for certain projects
What Affects Your Cost
- Square footage of the addition
- One-story vs. two-story addition type
- Foundation type required (slab, crawl space, basement)
- Interior finish level (standard vs. custom)
- County permit processing timeline
What Every Homeowner Should Know
Common Challenges
Foundation Transition
Connecting a new addition's foundation to the existing one is technically demanding. Settling differences between old and new concrete cause cracks in finish work if not properly tied together with rebar, expansion joints, and correct curing time.
Roofline Integration
Matching the pitch, drainage direction, and materials of the existing roof while creating a weathertight connection is one of the most complex aspects of addition work. Poor roofline integration is the most common source of long-term leaks on home additions.
Permit Timeline in Virginia
Chesterfield and Richmond additions require full plan review — 4–8 weeks. Projects requiring structural engineering stamps add another 2–4 weeks. We submit all documents in Week 1 to avoid schedule delays.
Electrical Panel Capacity
Most Richmond homes built before 2000 have 150–200A panels already near capacity. A new addition frequently requires a panel upgrade — an additional $2,000–$5,000 that must be planned early in the budget, not discovered during rough-in.
Pro Tips from Our Team
Order windows, doors, and roofing materials the day permits are submitted — they'll arrive by the time framing is ready, and late materials are the #1 cause of addition delays.
Build in a 20% contingency into your addition budget — opening walls and excavating around existing foundations reliably uncovers surprises.
Get a structural engineer's stamp on your drawings before submitting for permits — it almost always speeds up plan review in Chesterfield and Henrico.
Insulate the connection between old and new construction with particular care — this joint is the most common source of energy loss and moisture problems in additions.
If your addition includes a bathroom, locate it near existing plumbing stacks to minimize drain run lengths and venting complexity.
