Additions
Home additions and accessory dwelling units across Virginia, Maryland, and DC. Monumental handles zoning, permitting, design, and construction — from concept through move-in.
About the Service
Sometimes the answer isn't a new house — it's more of the one you already have. Additions let you expand without giving up the neighborhood, the schools, or the equity you've built.
Monumental designs and builds additions that feel like they were always part of the home. We handle zoning research, architectural plans, permitting, HOA coordination, and full construction. Whether it's a ground-floor primary suite, a second-story expansion, or a detached ADU, we manage every step so the new space matches the existing structure in quality and style.
We know the permitting landscape across Northern Virginia, Maryland, and DC — including the evolving ADU regulations that vary by jurisdiction.
Ground-floor additions — bedrooms, primary suites, family rooms
Second-story expansions — adding a full floor without changing your footprint
ADUs and in-law suites — detached or attached, built to local zoning requirements
Zoning, permitting, and HOA coordination handled completely
What's Part of the Service
Adding onto a home means tying new construction into an existing structure. Here's what we handle:
Feasibility & zoning — setback analysis, lot coverage, ADU eligibility
Architectural design — plans that match your home's style and roofline
Foundation & structural — footings, framing, and tie-in to existing structure
Mechanical extensions — extending electrical, plumbing, and HVAC to new space
Exterior matching — siding, roofing, and windows that blend with the original
Interior finishes — same quality inside the addition as the rest of your home
Permitting & inspections — from initial submittal through final certificate of occupancy
