Sunroom remodeling in Montclair CA - a room that fits the way you'll use it

Most people who call about an old sunroom have stopped using it, because it's too hot to sit in, the floor feels soft or it never felt like part of the house. The big decision is what the room becomes. It can have its own heating or cooling and leave your house doors and windows where they are, or it can be essentially a regular room addition. That choice moves the price more than anything else. Size matters too, along with whether the room needs a new foundation or support under a deck and which glass and doors you pick. The schedule mostly turns on the city's plan review rather than the build, and your own figure comes from the estimate once I've seen the room.

With a sunroom that's already standing, we go over the frame, roof, slab and glass and work out what's worth keeping before we draw anything new. Reusing what's sound saves you money, and replacing what's worn out now saves you a second job later. Next we settle the big choices, like insulation and what goes under the floor, because they're hard to change once the room is closed up. Then we pick windows and doors to suit your house and draw the plans. After that, our crew takes out what's going, frames the room, sets the glass and doors, finishes the room and cleans up.

If what you really want is shade and fresh air without the glass, screen room installation may suit you better than a full remodel. If the old room has to come down to the slab, the rebuild works a lot like a patio-to-sunroom conversion, starting from what's under the floor.

Montclair's Building Division issues building permits and handles plan checks and on-site inspections. The city wants detailed plans with energy compliance forms for room additions. Whether your remodel needs a permit depends on what we're changing, and that's a question for the division. A licensed contractor, the owner or an agent for either can pull the permit, and I'll tell you at the estimate who's pulling yours. When a job needs one, we prepare the plans, handle the city paperwork and keep you posted on where it stands, and you can expect the inspector to come out during the build. California's energy rules for a home's outer shell and its windows and doors depend on the climate zone the house sits in, so the glass and doors we pick for your room start from your home's zone. Newer state standards took effect at the start of 2026, so what passed when your room went up may not be what we'd choose now.

We're based in Montclair and work across the cities around it, and the rooms we're asked to redo look much the same on jobs in Ontario and Upland. Many of them started as a porch over a covered patio and were later expected to work as a real room. The fix is usually better glass, a better floor and a straight answer about heating and cooling, not tearing it all down.