Licensed California contractor · CSLB #1056277 30+ years of hands-on experience Owner-led communication Free estimates · no high-pressure sales Calabasas · Malibu · West LA · Pasadena · Burbank
Serving West LA, the Valley, Malibu, Calabasas, Pasadena, Glendale, Burbank, and nearby LA County areas.
What we build
Typical scope of a additions project
Site survey, soils report, and structural engineering Architectural design and permit drawings Foundation and framing Roofing, siding, and exterior tie-ins MEP integration with existing systems Interior finish-out Permits, inspections, and certificate of occupancy
Notes from experience
What tends to matter most
- Room additions on Westside lots typically span 4–7 months of active construction, plus 3–6 months of design and permitting.
- Hillside additions in Calabasas may require additional soils, grading, and structural review under the LA County Hillside Ordinance.
- Setback, lot coverage, and FAR limits often shape the design more than aesthetic preference.
Why homeowners reach out
Common problems a additions project solves
- Outgrowing the house but loving the lot, the neighborhood, and the school district
- Needing a separate primary suite, home office, or kids' wing without sacrificing the yard
- A small footprint that fits inside lot coverage rules only if the addition goes up a story
- A rear yard that could become a family room if a wall comes out and a slab and roof go on
- An aging parent or returning adult child who needs nearby but separate space
Cost & timeline
What shapes the range and the schedule
We don't quote specific numbers without a site visit and a defined scope — anyone who does is guessing. These are the factors that move both cost and timeline most on a typical additions project.
- Square footage added and whether it's single-story or stacks above the existing footprint
- Foundation condition and whether structural upgrades or sister joists are needed
- Lot constraints — setbacks, lot coverage, FAR (floor-area ratio) — that shape the design
- Roof line integration with the existing house (matching pitch, siding, profile)
- Soils report and grading on hillside lots (Calabasas, Agoura Hills, parts of Pacific Palisades)
- Whether you stay in the house through framing or move out for tie-in stretches
Permits & planning
Permit and planning considerations
Room additions always require permits. Drawings are stamped by an architect and structural engineer. Setbacks, lot coverage, and FAR (floor-area ratio) are usually the binding constraints — these often shape the addition's footprint more than design preference. Hillside additions in Calabasas, Agoura Hills, or Pacific Palisades may require soils-report and grading review under the LA County Hillside Ordinance. Coastal-zone additions in Malibu may require Coastal Development Permit review on top of standard plan-check. Confirm with the local jurisdiction what overlays apply to your parcel.
This is general planning information, not legal or permitting advice. Confirm specifics with the local jurisdiction for your address.
Project financing available — apply in minutes through our partner.
Related services
Projects often run together
ADUs
Garage Remodeling & ADU
Detached, attached, or garage conversion — designed around California ADU law and your city's local rules.
Kitchens
Kitchen Remodeling
A careful refresh, a layout reimagining, or a full structural rebuild — scoped to your home and budget.
Interior
Interior Remodeling
Reshape how the home lives — new layouts, finishes, lighting, built-ins — without expanding the building.
Where we serve
Room Additions across the Westside and nearby LA County
We're available for consultations and serve homeowners in and around these primary service areas. We also serve West LA, Santa Monica, Beverly Hills, the San Fernando Valley, Pasadena, Glendale, Burbank, Hollywood, Thousand Oaks, Simi Valley, and nearby LA County areas — reach out if your address is close and we'll let you know if we're the right fit.
Frequently asked
About Room Additions
- A standard single-story addition typically runs 4–6 months of active construction. Second-story additions or larger rear extensions run 6–9 months. Design and permitting add 3–6 months before that.