Project Overview
This project added a two-story rear addition to an older home in Chevy Chase, Washington, D.C., near Rock Creek Park, giving the family a new open kitchen and great room on the first floor and a primary suite on the second. Landis worked with the homeowners from initial schematic design through DC permitting and construction to weave the new addition into the existing house so it reads as one continuous home rather than a box bolted onto the back.
What Made This Project Hard
How We Solved It
Landis started with a measured survey and Schematic Design, presenting the homeowners with a real base budget range before they decided on the optional scope. In Design Development, a structural engineer designed the new foundation system and the temporary shoring plan needed to safely demolish the existing rooms without compromising the rest of the house. Finally, a new heat pump system was added, new hardwood flooring was installed, and the existing hardwood throughout the rest of the house was refinished to match, so the addition doesn't read as a separate project glued onto the original home.
Construction on a project like this is typically estimated at 28 to 30 weeks once permits are approved, though the full timeline, including design, permitting across multiple DC agencies, and any added scope, usually runs closer to a year or more.
Usually yes, with careful truss design. A new rear-facing gable can be framed to tie into the existing roof, with shingles behind the new ridge replaced so the addition reads as part of the original house rather than a visible add-on.
Usually, yes. Additions often need a new dedicated system, like a heat pump, for the new square footage, along with rework of the existing ductwork so the old and new parts of the house condition evenly as one system.
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