When your home doesn't fit anymore.

Design + permits typically run $18,000–$45,000 depending on size. Construction runs $350–$550/sqft for the added space, all-in. A typical 800 sqft second-story add lands around $320K–$450K delivered.

For a second story or major structural addition, most families move out for 4–6 months — the roof comes off. For attached rear additions where we can keep the existing envelope closed, you can often live through it with dust protection.

Plan on 12–18 months from first call to move-back-in. Roughly: 2 months design + engineering, 4–6 months permits, 4–8 months construction. Our permit process typically runs ~30% faster than the county average because our team has direct working relationships with the reviewers.

Rarely. Even 'partial' second stories almost always require the roof to come off for structural connections, tie-ins, and MEP. Any builder telling you otherwise is either not doing engineering or is planning to charge you for re-work later.

In most SD County submarkets, a well-designed addition returns 65–85% of cost in resale value at year one — and appreciates faster than the raw addition cost thereafter. For families who plan to stay 5+ years, additions almost always outperform moving.