Three season sunrooms in Bloomington CA - a room built around how you'll use it
Have a patio or deck you hardly use? We'll close it in with windows and a roof so it becomes a room you sit in.

What is a three season sunroom, and is it the right room for you?
A three season sunroom in Bloomington, CA is a roofed room off your house whose wall openings are filled with glass or plastic panels. You get a sheltered, enclosed space without heating or cooling it like the rest of your home, because it isn't built as regular living space.
Most people who call us have a patio or deck they want to use more, and a three season room is often the simplest way to get there, since it skips the heating and cooling a four season sunroom is built for. The price mostly moves with the size of the room, the shape your slab or deck is in, and whether you add insulation, plumbing or a way to extend heating or cooling out there. The schedule turns on the base and the permit, so before work starts we confirm whether San Bernardino County or your city handles your address, and we take care of the paperwork when the job calls for one. The estimate I write up after seeing your place gives you your own figure.
- Licensed and fully insured.
- Free estimates at your property.
- We reply within 1 business day.
What three season sunrooms look like
How we build a three season sunroom
We start with a question most people don't expect, whether you might ever want heating or cooling out there, because that answer changes the windows and doors I'd pick. Then I look over your slab or deck and the wall where the room will tie into the house, since both have to be sound before anything goes on top. Once the design and the permit are settled, our crew sets the frame on the base, ties it into the house, puts up the roof and gutters, fits the glass or panels and the doors, and cleans up before we walk the room with you.
A lot of calls start out as something close to this. If you already have a covered patio and mostly want walls and glass added, patio enclosures may fit better. If your roofline, your yard or the way you want to use the space doesn't suit a standard layout, we'll draw it as one of our custom sunrooms instead.
Why Bloomington homeowners call us for a three season room
I do every estimate myself
I come out to your house for the visit and the estimate, and our own crew does the building while I check the work as it goes. You deal with the person who answers for the room from the first visit to the last.
Licensed and fully insured
We're licensed and fully insured. Look us up with the state board before you sign anything, because you should know who's building onto your house.
County wind and setback rules checked
Where San Bernardino County handles your address, it sets the minimum wind exposure every room's structural design has to plan for, so we frame for it from the start. The County also says building setbacks have to be kept whether a permit's required or not, and that decides where on your lot the room can sit.
Years running another builder's jobs
Before I started this business in 2017, I spent years running another sunroom builder's jobs and learning the work from the slab up. That's why I'll explain each choice as many times as you want, so you know why your room is built the way it is before we build it.
The heating question is the one to settle first, since it decides the windows and doors. Tell us your room size and whether it would sit on a slab or a deck, or call (909) 275-7071, and I'll come take a look.
Get a written estimate for your three season room
Send the form and we'll reply within one business day to set a time. I'll come out, look at your slab or deck and write up a free estimate, with no obligation to go ahead.
- Licensed and fully insured.
- Free estimates at your property.
- We reply within 1 business day.
What happens after you call about a three season room?
Call or send the form
Call (909) 275-7071 or send the form with the room size, whether it would sit on a slab or a deck, and whether you might ever want heating or cooling. We'll set a time for me to come out.
I look at your base
I look at the slab or deck and where the room would join the house, and we talk through how you'll use the space. Then I write up an estimate for the room we talked through, so you see your own figure before anything is decided.
We handle the permit paperwork
We check whether the County or your city handles your address and take care of the paperwork with that office. Where it's the County, plans go in for its review and approval before construction can start, so the build date waits on that.
Our crew builds the room
Our own crew builds it while I check each stage of the work. When it's done, we clean up and walk through the room with you.
Three season sunroom questions
How much does a three season sunroom cost in Bloomington, CA?
A three season room added to an existing base, installed, usually costs about $95 to $140 per square foot in the San Bernardino area. That's what the work typically runs around here, not our price, and it leaves out insulation, extending heating or cooling, plumbing and pulling permits, so each of those adds to the total. Larger rooms that need a foundation and have heating and air conditioning sit at the high end.
Do I need a permit for a three season sunroom in Bloomington?
You might, so it's worth asking before anything gets built. San Bernardino County Building and Safety issues permits, and its list names enclosed patios, additions and structures over 120 square feet, but it doesn't name three season rooms. You can ask the County directly through the contact form on its permits page.
Can I add heating or cooling to a three season room later?
It's better to decide before the room is designed, because a sunroom built for its own heating or cooling is a different kind of room with added window and door requirements for air leaks, water and heat. One cost guide also says insulated windows and insulation in the walls, floor and roof are much easier to put in during the build, and adding them later can often cost more. If there's any chance you'll want it, tell me at the first visit.
Can a three season sunroom go on my existing patio slab or deck?
It can when the slab or deck is up to it, because every sunroom has to pass its loads along a continuous path down to the foundation, so your base becomes part of what holds the room up. If your slab might be post-tensioned, with steel cables run through the concrete, one California city's guidance says to check before saw cutting or breaking it, since cutting one of those cables can be very dangerous and expensive to repair.
How do I look up a sunroom contractor's license in California?
Use the license lookup from the state contractor board, CSLB, which lets you check a contractor's license or a Home Improvement Salesperson registration, including any complaint disclosure. The board also recommends reading its Hiring a Contractor page before you hire anyone or sign a contract.
How do I take care of a three season sunroom?
Check the roof and gutters once a year and keep the weep holes, the small drain openings in the frame, clear so water can get out. One installer's guide suggests that, and it also says to keep door and window tracks clean and use a pure silicone spray on them, since oil-based lubricants tend to attract dirt.
Other options besides a three season sunroom
Patio enclosures
A fit when you already have a covered patio and mostly want walls and glass added to it.
Custom sunrooms
For a room that has to work around an odd roofline, a sloped yard or a layout no standard plan fits.




