Sunroom additions in Montclair CA - a room that looks like it was always there
You want more room than your patio or deck gives you. We build an addition that matches your roofline and fits how you'll use it.
- Services
- 16
- Service areas
- 12
Get your sunroom addition sized up
We look at your roofline and floor, then talk through which room type fits.
Request an estimateWhat goes into a sunroom addition in Montclair?
A sunroom addition in Montclair, CA adds an enclosed room onto your house. It can be anything from a screened porch to a four season room that's heated and cooled, built against your wall and tied into your roof so it reads as part of the home.
Most people who call us have a covered patio or a deck and want a room they'll actually use, so the first thing I ask is how you'll use it, because that decides the type of room and most of the cost. The price moves with the size, the room type, whether you want heating and cooling, and whether we pour a new foundation or build on an existing slab, which is often how a patio-to-sunroom conversion starts. The schedule turns mostly on getting plans through the city before we build, then on the size of the room and how much work the roof tie-in takes, and the on-site estimate is where we pin all of that down for your house.
How we build a sunroom addition
An addition should look like it belongs to the house, so every job starts with your roofline and the wall the room will meet. We settle the room type, the insulation and what's under the floor before any plans get drawn, because changing those later costs you far more than getting them right now. Then our crew sets the footings or foundation, frames the walls, and ties the new roof into your existing roofline so the pitch lines up and the joint at your wall stays clean and sealed. Windows, doors and the finish work go in last, and we clean up before we hand the room over.
If you want the room in every season, a four season sunroom is fully enclosed with all-weather windows and brings heating and cooling into the plan. A three season sunroom usually isn't heated or cooled, so it costs less to build and to run, and I'd steer you there if you'll mostly use the room in good weather, because there's no sense paying for heating and cooling you won't use.
Sunroom addition permits and plans in Montclair
A room addition in Montclair needs plans cleared by the city, whose plans examiner has to sign off before a permit is issued, and the city asks for three sets of detailed plans. When a job needs a permit, we prepare those plans, handle the city paperwork and keep you posted on where it stands, and I'll tell you at the estimate who's pulling it. Once we're building, the city only schedules a next-day inspection when it's requested before 5 p.m. the day before, and it's closed every Friday, so a Thursday request lands on Monday and we plan the work around that.
Most houses we add onto around here have a covered patio or a slab out back, and the tricky part is usually where the new roof meets the old one, so we check the pitch and eave height on the first visit. We're based in Montclair and see the same layouts on jobs in Ontario, Pomona, Upland, Chino and the other cities around it.
Why call us for an addition
I measure, our crew lead builds
I come out myself to look at the job and measure, and our crew lead runs the build with our installers. The person who sized up your roofline is the one who planned the room, so nothing gets lost between the estimate and the build.
Building in Montclair since 2017
I started this business in Montclair in 2017, after learning the trade building patios and sunrooms for other people. Turning patios, decks and slabs into rooms is most of what we do, so the quirks of tying onto an existing house aren't new to us.
Licensed and fully insured
California only lets an unlicensed person take a job up to $1,000 when it needs no permit and they have no employees, so whoever builds a permitted addition needs a contractor's license. We're licensed and fully insured, so that risk isn't sitting with you.
Your satisfaction, guaranteed
We settle the room type, the insulation and the floor before we build, because those are the choices that cost the most to undo. That way the room you get is the one you planned for.
- Phone
- (909) 738-1507
- Hours
- Mon–Fri: 8 AM–9 PM, Sat–Sun: 6 AM–9 PM
- Location
- Montclair, CA 91763
The choice that matters most is the type of room, so come with an idea of how you'll use it, a rough size and whether it goes on a deck, then send us a request or call (909) 738-1507.
Get a sunroom addition estimate for your house
We reply within one business day to set a time, and I come out to look at your house and measure. The estimate is free, done on site and comes with no obligation to go ahead.
- Phone
- (909) 738-1507
- Location
- Montclair, CA 91763
- Hours
- Mon–Fri: 8 AM–9 PM, Sat–Sun: 6 AM–9 PM
- Credentials
- Licensed and fully insured.
Frequently asked questions
How much does a sunroom addition cost in the Montclair and Riverside area?
A cost guide for Riverside, California puts a sunroom at about $17,000 to $120,000 per project, and that's the market's range, not our price. Larger rooms that need a foundation and have heating and air conditioning land toward the top of it. The on-site estimate is where we work out size, type and foundation for your room.
Can my existing deck hold a sunroom addition?
Usually not as it stands, because a deck typically needs added beams, posts or footings to carry a sunroom's weight and loads. The national sunroom trade group says to ask a local structural engineer whether your deck is suitable before you plan around it. I look at what's under your deck on the first visit, so you know early whether that step is needed.
How long does plan review take in Montclair for a room addition?
During normal building activity, the city's first plan review takes about 2 weeks, and each later review takes about 1 week. Every round of revisions adds another review, so build those weeks into your start date. We try to get the plans complete the first time, since each extra round costs you a week.
Do I need a written contract for a sunroom addition in California?
Yes, California requires a written contract for any home improvement project over $500, and a sunroom addition is well past that. Check that it spells out the room type, the size and what's under the floor, since those decide what you're paying for.
Can I draw my own plans for a sunroom addition in Montclair?
Sometimes, because the city lets owners prepare their own drawings for very small projects that don't need engineering, such as patio covers and one-story wood frame additions. The drawings have to be clear, drawn to scale and carry the details needed for approval. If you plan to do the work yourself, the city offers an owner-builder permit once you sign a form exempting you from workers' compensation insurance.
How do I take care of a sunroom roof?
Have the roof and gutters checked once a year, which is what one sunroom company's construction guide suggests. The same guide says to keep activity on the sunroom roof to what's needed, so only get up there when there's a reason to.
Other rooms we build
Four season sunrooms
For a room you'll sit in any month of the year, with all-weather windows and heating and cooling planned in from the start.
Three season sunrooms
A lighter, lower-cost room for the months you'd spend outside anyway, without paying to heat and cool it.