Quick answer: A primary suite addition costs $90,000–$250,000 in Los Angeles — a ground-floor suite is less expensive than a second-story suite, which requires structural reinforcement and stair access. APLA Construction (CA Lic #1136359) handles this throughout Greater Los Angeles.
Adding a master suite is one of the smartest investments a Los Angeles homeowner can make. It delivers a private retreat, a spa-style bathroom, and a walk-in closet while significantly boosting resale value in neighborhoods like Brentwood, Studio City, Pasadena, and Manhattan Beach. APLA Construction is a licensed LA general contractor (CA Lic #1136359) that designs and builds master suite additions from foundation to final finishes.
A master suite addition in Los Angeles generally costs between $90,000 and $250,000, with most projects landing around $130,000 to $180,000. The range depends on square footage, whether you build out or up, and the level of finishes. Here is a 2026 guide:
| Item | Typical Cost |
| Ground-floor suite (300-400 sq ft) | $90,000 to $160,000. |
| Second-story suite | $140,000 to $250,000, due to structural reinforcement and stair access. |
| Cost per square foot | $350 to $550 in LA, with luxury finishes in Bel Air and Beverly Hills running higher. |
The attached bathroom is the most expensive part per square foot because of plumbing, tile, and fixtures. A walk-in closet, large windows, and a private entry also affect the budget.
If you have yard space, a ground-floor addition is usually cheaper and faster. If your lot is tight, common in Santa Monica and Culver City, a second-story master suite preserves your yard but requires foundation and framing upgrades. We assess your home and lot to recommend the most cost-effective approach. For two-story projects, see our Second Story Addition Cost Guide.
A master suite addition requires a full building permit, structural plans, and Title 24 energy compliance through LADBS or your city building department. Construction typically takes 3 to 5 months after permit approval. APLA manages plans, permits, and inspections start to finish.
Homeowners in the Valley, including Encino, Tarzana, and Woodland Hills, often want indoor-outdoor flow with sliding doors to the backyard. Coastal clients in Redondo Beach and Pacific Palisades prioritize ocean-view windows and moisture-resistant finishes. We tailor every suite to the home and neighborhood.
Master suite additions typically return 55 to 65 percent of their cost at resale and dramatically improve buyer appeal in the Los Angeles market.
A comfortable LA master suite is 300 to 500 square feet, including the bedroom, bathroom, and walk-in closet.
Yes. Any addition that expands square footage and adds plumbing and electrical requires permits. APLA handles the entire permit process for you.
Most master suite additions take 3 to 5 months of construction after permits are issued, depending on size and complexity.
APLA Construction builds custom master suite additions across Los Angeles. Licensed CA Lic #1136359 — verify on CSLB. Call (818) 818-4419 or email info@aplaconstruction.com for a free estimate. Learn more about our home addition services.