Home Additions in Maryland & DC

Expand your living space with Build Dog Construction. From single room additions to complete second stories, we create seamless expansions that enhance your home's value and functionality.

Home addition construction project

What's Included

Our comprehensive home addition service covers every aspect of your expansion

Room additions and extensions
Second story additions
Sunrooms and conservatories
In-law suites and ADUs
Garage conversions
Bump-outs and bay windows
Foundation and structural work
Seamless integration with existing home

Home Addition Pricing

Bump-Out

$25,000 - $50,000
  • • 50-200 sq ft
  • • Single room
  • • Small expansion
  • • Basic finishes

Room Addition

$50,000 - $150,000
  • • 200-500 sq ft
  • • Full room
  • • Bedroom/bathroom
  • • Quality finishes

Second Story

$150,000+
  • • Full second floor
  • • Multiple rooms
  • • Major expansion
  • • Premium finishes

Frequently Asked Questions

How long does a home addition take?

Home additions typically take 3-6 months depending on size and complexity. We provide a detailed timeline during your consultation.

Do you handle permits and zoning?

Yes, we handle all permits, zoning approvals, and inspections as part of our comprehensive service.

Will the addition match my existing home?

We carefully match materials, finishes, and architectural details to ensure seamless integration.

What's included in the estimate?

Our estimates include design, materials, labor, permits, and all construction costs. No hidden fees.

Do you offer financing options?

Yes, we work with several financing partners to help make your home addition project affordable.

Ready to Expand Your Home?

Get your free consultation and estimate today. No obligation, completely free.