Historic Compatible
Addition
A historic compatible addition extends a Washington DC historic home — typically a row house in Capitol Hill, Georgetown, or LeDroit Park — without compromising its architectural character. We design and build additions that meet Historic Preservation Review Board (HPRB) guidelines: complementary in scale, materials, and proportion to the original structure, but clearly identifiable as new work rather than a false replica.
Our Process
- Historic district review — we research your property's historic designation, applicable guidelines, and any prior approvals on the site.
- HPRB-ready design — drawings developed with HPRB criteria in mind from day one, reducing review cycles and revisions.
- Permits & approvals — we present at HPRB hearings when required and coordinate with DOB on the building permit.
- Construction — careful tie-in to the existing structure, period-appropriate materials, and craftsmanship that holds up to a historic context.
Architectural Harmony:
Matches or complements the original building's design, materials, scale, and proportions.
Preservation of Character:
Protects important historic features without altering or damaging them.
Clearly Distinguishable:
The addition is compatible but still recognizable as new — not a false replica of the original.
Reversible Design:
Where possible, designed so a future owner could remove the addition without harming the original structure.
Historic compatible additions often go hand-in-hand with historic home renovation work. For interior expansion without an addition, see basement lowering and dig-out.
