How long will a room addition project take from start to...

Mar 31, 2026
Project Concept Done by the GC, Architect and You 1–3 Weeks
Planning Done by the Architect 2–4 Weeks
Plan Approval Done by City Officials and other local authorities 3–24 Weeks
Construction Done by the home addition contractor 12–24 Weeks

Naturally the timeline highly depends on the scope of work and the different cities’ bureaucracy and workload at the specific time. In Los Angeles city for example, a small 300 SF master suite addition can be completed in 4 months from planning to construction. The same project in Burbank, Glendale, or even the County of Los Angeles can take 6–12 months.