Design inspirationMaster Suite Addition Builders
A private new primary bedroom, walk-in closet, and spa-quality bath — added seamlessly to your existing home.
Master Suite Addition across Greater Los Angeles.
We add a private primary bedroom, walk-in closet, and full ensuite bath to your existing home, usually off the back or side.
Every HomeAdd master suite addition is designed for real life: quiet HVAC zoning, blackout-ready windows, generous closet layout, and a bath that actually feels like an upgrade. Fully permitted and engineered — no shortcuts.
Primary suites are commonly 300–450 sq ft. We work throughout the San Fernando Valley, Westside, Conejo Valley, and Santa Clarita Valley.
Common master suite addition options.
Bedroom + closet + bath
The classic combo — 12x14 bedroom, walk-in closet, full ensuite bath.
Bedroom + spa bath
Larger bath with a freestanding tub, oversized walk-in shower, and double vanity — the luxury upgrade.
Suite with sitting area
Add 60–100 sq ft for a reading nook, coffee bar, or private lounge inside the suite.
Suite with private patio
French or slider doors off the bedroom to a small private garden or hot-tub area.
Ground-floor primary
Great for aging in place — no stairs, wider doorways, and a curbless shower engineered to code.
Second-floor primary
When the lot is tight, we push the suite up instead of out. See our second-story addition page for the structural side.
What's included in every HomeAdd project.
Every phase, in order.
- 1Feasibility & design
Site walk, zoning check, and 3D design of the suite.
- 2Construction docs
Engineering, Title 24, permit set.
- 3Plan check & permits
Plan-check submittal, corrections, and permit issuance.
- 4Demo & foundation
Site protection, selective demo, new footings and slab.
- 5Framing & envelope
Framing, roofing, windows, and weather barrier.
- 6MEP & insulation
Rough electrical, plumbing, HVAC — inspections and insulation.
- 7Finishes
Bath tile, cabinetry, flooring, paint, trim, closet system.
- 8Final inspection & handoff
Building final, punch list, walkthrough, closeout package.
Planning ranges (Los Angeles & Ventura)
Preliminary planning ranges vary by jurisdiction, site conditions, design, utilities, and finish level. A written proposal follows feasibility and design.
Bedroom, closet, and standard bath with mid-range finishes.
Freestanding tub, oversized shower, double vanity, upgraded fixtures.
Sitting area, private patio, premium finishes, custom millwork.
Filed, corrected, inspected — by us.
We prepare and submit the permit package to the department that reviews your address, whether that is LADBS, LA County, Ventura County, or a city building department in Los Angeles or Ventura County. You never touch a portal, sit on hold, or drive to a counter.
- Residential building permit
- Structural plan check
- Title 24 energy compliance
- Plumbing, mechanical, electrical permits
- Bath ventilation permit
- Panel upgrade (as required)
- Hillside or HPOZ review (as applicable)
- Final building inspection & sign-off
What this scope typically looks like.
Representative planning images of the kind of build described above.
Questions homeowners ask first.
Still have questions? Call (877) 544-1543 or request a callback — a HomeAdd project advisor will walk your address on Google Earth with you on the phone.
How much value does a master suite addition add?+
It depends on your local market and on the project itself: size, layout, finishes and how well the suite fits the rest of the house. A local real estate professional or appraiser can give you a view for your neighborhood before you commit.
Do I need to move out during construction?+
No. We install full dust barriers and negative-pressure separation. Most families stay in the home the entire build with only a few interruptions on utility cut-over days.
Can the bath include a steam shower or sauna?+
Yes, with proper waterproofing, venting and electrical planned in design.
How long does the permit process take?+
Plan-check time depends on the jurisdiction, the project and how quickly corrections are turned around. Hillside, coastal or HPOZ lots usually take longer. We give you a realistic timeline before you sign.
Will you match my existing exterior?+
Yes — matched stucco, matched roofline, matched windows. The goal is an addition that looks like it was always part of the house.
Can I combine this with a garage conversion or ADU?+
Absolutely. Many clients pair a primary suite addition with a garage conversion for an in-law unit — one design phase, one permit set, one crew, one contract.
Other ways to grow your home.
Bigger living space with vaulted ceilings, a fireplace, and doors that open to the yard.
A fully permitted, insulated, four-season room with glass walls and matched roofline.
A brand new full or half bath added to your home — designed and permitted end-to-end.
A quiet, permitted, HVAC-served office with its own entry and built-in millwork.
Add a two- or three-car garage to your property — matched to your home, permit-ready for a future ADU.
One more bedroom, an office, a nursery — added to your existing footprint.
Ready to plan your master suite addition?
We'll walk your property, pull the zoning, and give you a real budget and timeline — before you spend a dollar on design.