Four season sunrooms in Manhattan Beach CA - a room you can use all year
Patio too chilly at night and too warm at midday? We build an insulated, heated and cooled room you can use every month.
- Licensed and fully insured.
- Free on-site estimates.
- Expect a reply within 1 business day.
What do you get with a four season sunroom?
A four season sunroom is an addition that ties into your house's existing structure, with insulation, wiring and heating and cooling, so it works as part of the house in every month of the year. We build them in Manhattan Beach for homeowners who want a room they'll use in January as much as in July.
Most people who call us have a patio or deck they enjoy on a warm afternoon and then can't use once the evening turns cool and damp, and many of those jobs start as a patio-to-sunroom conversion. If you want a room you'll use every month, you plan for insulation, wiring and heating and cooling as part of the job, not as extras later. The price moves mostly with the size of the room, the materials you choose and how much heating, cooling and electrical work it needs, and the schedule follows the permit process and the order the trades come through. The written estimate I give you after my visit sets out your own figure.
How we build a four season sunroom
The first thing I settle with you is whether the room will open into the rest of the house or close off on its own with its own heating and cooling, because everything after that follows from it. An earlier national model code treated a sunroom open to the house as living space and a closed-off one with its own temperature control as not, and while that isn't California's rule today, it shows why the choice shapes how the room is classed and built. From there I measure and draw up the room, and our crew frames it into your house, runs the wiring, insulates it, sets the windows and doors and puts in the heating and cooling before the finish work and cleanup.
Not every space needs a full four season room. If you'd mainly use the space in mild weather, a three season sunroom may suit you better, and if you already have a covered patio you'd like to close in, we also build patio enclosures.
Open to the rest of the house
This suits you if you want the sunroom to feel like part of your kitchen or living room, with a wide opening between them. It takes more planning where the new room meets the house, but you end up with one continuous space.
Closed off with its own heating and cooling
This suits you if you want a room you can shut a door on, such as an office, a guest room or a quiet place to read. Because it keeps its own temperature, you can heat or cool it only when you're using it.
Building a four season sunroom in Manhattan Beach
The City of Manhattan Beach requires permits for any construction, remodel or alteration project, and its list names patio covers, decks and window retrofits but doesn't name sunrooms, so before work starts I check with the city about what your room needs, and then we prepare and file the paperwork for any permits it calls for. If your house sits in the city's Coastal Zone, the project also needs a coastal permit unless it's exempted or excluded. An addition that adds heated and cooled space to your home must also recycle at least 65% of its waste here, so we plan how we sort and haul debris before the first wall comes down.
We're based in Manhattan Beach and work across the South Bay and the cities around it, where salt air, morning fog and damp evenings are hard on hardware and finishes, so we choose materials and seal each room with that in mind, the same way we do on jobs in Hermosa Beach and Redondo Beach.
Why Manhattan Beach homeowners call Manhattan Beach Sunrooms & Patios for four season rooms
The owner plans every room
I started this business here in 2023, and I still come out to every job myself to measure and plan the room, while our own crew does the building. Your questions go to the person who planned your room, not to someone hearing about it for the first time.
Licensed, insured and glad to explain
We're licensed and fully insured. The state contractor board describes a general building contractor's main work as structures for shelter and enclosure that bring in at least two unrelated trades, and it keeps a separate glazing class for glass, frames, sashes and doors, so it's fair to ask any crew which license classes it holds.
Windows planned for your climate zone
California's energy code sets efficiency standards for windows and doors by climate zone, so the glass rules for a sunroom here depend on which zone your house is in. We plan the windows around your zone from the first drawing, so they suit the rules for your house.
If you'd like to talk through the room you have in mind, send us a request or call (424) 290-8610, and I'll set up a time to come see the space.
Request a quoteGet a written estimate for your four season sunroom
Expect a reply within 1 business day to set up a visit, and then I come out to measure and talk through the room before you get a written estimate. The visit and the estimate are free, and there's no pressure to book.
What happens after you call about a four season sunroom in Manhattan Beach
Call or send a request
Call (424) 290-8610 or use the form and tell us a little about the space. We get back to you to set a time for me to come out.
I visit, measure and plan
I come out myself to measure, look closely at what the room will sit on and talk through how you'll use it. You then get a written estimate, so you see what the room includes and what it costs before you sign anything.
We file permits and build
We take care of the permit paperwork and build in stages. The city's usual construction days are Monday through Saturday, with no work on Sundays or city holidays, so the build moves ahead only on those days.
Walk through your finished room
Before we call the job done, I walk through the finished room with you and try the windows, doors and heating and cooling together. Anything you're unsure about, I'd rather explain on the spot.
Frequently asked questions
How much does a four season sunroom cost in Manhattan Beach?
Across the US, a four season sunroom usually costs about $200 to $400 per square foot, or about $20,000 to $80,000 for the whole job, and that's the national market price, not ours. Where your room falls depends mostly on its size and materials, as I mentioned above. Your written estimate from my visit gives your own figure, with satisfaction guaranteed on every job.
What is the best way to choose between a three season and a four season sunroom?
Choose by how and when you'll use the room. A three season room is glassed in but has no insulation or heating and cooling, so it's at its best on mild days, while a four season room has both and works like any other room in the house. If you picture using it on a cold winter evening or as an office, plan on four season.
Do I need a permit to build a sunroom in Manhattan Beach?
Plan on one, because the city requires permits for any construction, remodel or alteration project, even though its list doesn't name sunrooms. As I said above, I check with the city about what your room needs, and we prepare and file the paperwork.
How do I find out if my house is in the Manhattan Beach Coastal Zone?
The city's Coastal Zone map shows whether your property lies inside the zone. If it does, your sunroom will need a coastal permit unless it's exempted or excluded, so it helps to look up your address before my visit.
What kind of windows does a four season sunroom need?
It needs windows that keep out water and air and hold heat well, since the room is heated and cooled like the rest of your house. An earlier national model code set added requirements on just those points for enclosed, heated and cooled sunrooms, and in California the window rules also turn on your climate zone, as I noted above.
Do the new California building codes apply to a sunroom in Manhattan Beach?
They're the codes in effect now, since the city notes that the 2025 California building codes took effect on January 1, 2026. If you're comparing plans, it's fair to ask each contractor whether theirs follow these codes, and I'm glad to show you how ours do.
Other rooms we build
Three season sunrooms
A lighter glassed-in room for when you mostly want to enjoy the patio on mild days and keep the build simpler.
Patio enclosures
Walls and windows added to a covered patio you already have, for shelter from wind and fog without a full addition.
Manhattan Beach, CA
Start planning your four season sunroom
When you reach out, have your address, the room size you're picturing and whether it should open into the house ready, since those three answers shape the first drawing.