Design inspirationSunroom Addition
A fully permitted, insulated, four-season room with glass walls and a matched roofline — not a screened porch.
Sunroom Addition across Greater Los Angeles.
A HomeAdd sunroom is a real permitted room — insulated walls, insulated glass, dedicated HVAC, and roof structure that ties into the existing house. You use it in July and you use it in January.
Most sunrooms replace an existing patio or add onto the back or side of the house. We design them for how you actually want to use the space: reading, dining, working from home, or a plant-filled morning coffee spot.
Typical size is 150–320 sq ft. Fully engineered and code-compliant.
Common sunroom addition options.
Rear sunroom
Off the family room or kitchen — the most common configuration.
Side sunroom
On lots where the backyard is precious, we push off the side yard instead.
Sunroom over patio slab
Reuse the existing patio foundation and frame walls and roof above it.
Dining sunroom
Sized for a table for six with pendant lighting overhead.
Reading / plant room
Smaller footprint, more glass, extra south-facing exposure.
Sunroom + home office
Wired for data, sound-insulated, HVAC-zoned separately.
What's included in every HomeAdd project.
Every phase, in order.
- 1Feasibility & design
Site walk, glazing options, 3D design.
- 2Construction docs
Engineering, Title 24, permit set.
- 3Plan check & permits
Plan-check submittal, corrections, permit.
- 4Foundation / prep
New footings or slab prep.
- 5Framing & envelope
Framing, roofing, windows and doors.
- 6MEP & insulation
Electrical, HVAC, insulation, drywall.
- 7Finishes
Flooring, trim, paint, lighting.
- 8Final inspection & handoff
Building final, punch list, walkthrough.
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.
Sunroom addition cost guide: ranges, Title 24 glass limits and permits
Reading or breakfast room with standard glazing and a mini-split.
Dining or living scale with upgraded glazing and integrated lighting.
Larger footprint with bifold doors that fully open to a covered patio.
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
- Electrical & mechanical permits
- Roofing permit (as required)
- Egress & glazing compliance
- Setback / lot-coverage verification
- Final building inspection
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.
Is a sunroom the same as a Cal-Room or three-season room?+
No. Prefab 'Cal-Rooms' or three-season rooms are often not fully insulated or permitted as living space. Everything HomeAdd builds is fully permitted, insulated, and rated as habitable square footage — it adds to your home's official size.
Will it be hot in summer?+
Not with the right glazing spec and HVAC. We use low-E dual-pane glass, calculate solar heat gain in design, and size the mini-split accordingly. Comfortable year-round.
Can I keep my existing patio slab?+
Sometimes. We inspect the slab thickness, existing drainage, and setbacks. If it's sound and the footprint works, we build directly on it — saves demolition cost.
How much glass can we have?+
Title 24 energy rules limit glazing, so the glass area is set in design with high-performance glass and the energy calculations for your project.
Does it add to my property tax?+
New square footage is generally assessed for the value it adds, not the whole house; confirm the details with your County Assessor.
Can this become a permanent bedroom later?+
Yes, if we design it that way from the start — egress window, closet space, HVAC sizing, and permit classification. Tell us in design and we'll build accordingly.
Other ways to grow your home.
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.
Second stories, full wings, kitchen expansions — significant square footage.
Double your square footage without touching the yard — a full second floor built above your existing home.
Ready to plan your sunroom addition?
We'll walk your property, pull the zoning, and give you a real budget and timeline — before you spend a dollar on design.