Arlington Home Addition: The Smartest Way to Get the Space You Need Without Leaving the Neighborhood You Love

Common home addition types in Arlington include first-floor additions (expanding the footprint), second-story additions (adding a full or partial second floor), bump-out additions (smaller expansions of existing rooms), and garage conversions with additions. Berriz Design Build evaluates your lot, zoning, and goals to recommend the right approach.

Home addition costs in Arlington typically range from $150,000 for a modest bump-out to $600,000+ for a comprehensive two-story addition. Key cost drivers are size, structural complexity, finish level, and the extent of interior work triggered by the addition. Use our Pricing Guide for current ranges.

Yes. All home additions in Arlington require building permits from Arlington County, including structural, electrical, plumbing, and mechanical permits as applicable. Berriz Design Build prepares complete permit packages and manages the approval process — one of the most complex aspects of any addition project.

Most home additions take 4–10 months from design through completion, depending on size and complexity. Berriz Design Build's integrated design-build model compresses the timeline by coordinating design, permitting, and construction simultaneously rather than sequentially.

Architectural integration is the most critical — and most commonly neglected — aspect of home addition design. Berriz Design Build's in-house design team ensures that rooflines, materials, window proportions, and interior flow are designed in relationship to your existing home, not just attached to it.

Berriz Design Build has designed and built home additions throughout Arlington for over 36 years. Our integrated design-build model means one team handles design, permitting, and construction — ensuring the addition looks like it was always part of your home, not added to it.