APLA  /  SERVICES  /  ADDITION

Addition.

Square footage that fits the original. Second-story pop-ups, bump-outs, and rear additions. We engineer the tie-in so the new work doesn't read like an afterthought.

Service no. 10
Typical timeline 6 – 10 months
Crew size 8 – 14
Service area Greater LA
Scope of work

What's included.

Second-story pop-ups, bump-outs, and rear additions. We engineer the tie-in so the new work doesn't read like an afterthought.

Every service is performed under APLA's General B license (#B-844201) with the appropriate specialty trade licenses on each crew. Workers' comp and $2M general liability on every project.

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Read our full 2026 guide: Second Story Addition Los Angeles Guide

Frequently Asked Questions

How much does a room addition cost in Los Angeles?

A bedroom addition costs $80,000-$165,000. A primary suite addition costs $125,000-$240,000. A second story addition costs $220,000-$680,000 depending on scope. All prices include design, permits, and construction. APLA provides written itemized estimates for every addition project. CA Lic #1136359.

How long does a room addition take in Los Angeles?

A room addition takes 8-14 months total including design, permit, and construction. LADBS permit processing takes 45-90 days for additions. Construction takes 4-8 months depending on size and complexity. APLA manages the full process from design through Certificate of Occupancy.

Do I need a permit for a room addition in Los Angeles?

Yes. All room additions require building permits from LADBS (City of LA) or the local city building department. Additions involve structural, electrical, plumbing, and mechanical work - all of which require permits. APLA handles all permit submissions and inspections for every addition project.

What is the difference between a room addition and an ADU?

A room addition is attached to and part of the primary home - used for personal space like a primary suite or family room. An ADU is a separate dwelling unit that can be rented independently. If the goal is rental income, an ADU delivers better ROI. If the goal is more personal living space, a room addition is typically more cost-effective.