How long does a home addition take in Garrett Park?

Based on 159 completed MOSS home additionprojects across the DMV region, end-to-end timelines, from your first design conversation through move-in, typically run 6 to 16 months, with a median of about 11 months. That full span breaks into three phases: design and selections (generally 2 to 4 months),permitting and approvals (1 to 3 months), and on-site construction (3 to 9 months depending on scope). The build itself is just one piece of a larger, carefully sequenced process.

Where your Garrett Parkproject lands in that range depends on several converging factors. Scope and structural complexity matter most, a second-story addition over an existing foundation moves differently than a rear addition requiring new footings or significant structural steel. Montgomery County's Department of Permitting Services typically takes 20 to 30 days from submission to approval for straightforward projects, though each revision cycle adds 7 to 10 business days, so clean, complete drawings at first submission are essential. Garrett Park's tree preservation ordinances can also introduce an additional layer of review if the addition footprint affects protected trees, and older homes in the neighborhood sometimes reveal surprises, outdated wiring, undersized framing, or buried conditions, once work begins. Long-lead materials like custom windows and cabinetry, which can run 8 to 14 weeks out, add further variability if not ordered early.

MOSS's design-buildmodel is specifically structured to compress that timeline wherever possible. Because our designers, architects, and production team operate as a single integrated group, permit documents are ready for submission as soon as design is finalized rather than waiting on handoffs between firms. We identify and order long-lead items during the design phase so they arrive on-site when construction is ready for them, not weeks after. That coordination, combined with our familiarity with Montgomery County's review process and Garrett Park's community standards, keeps your project moving steadily from first conversation to completed addition.