The design-build difference.
One team designs it, permits it, and builds it. Here's why that changes how your room turns out.
One team, more than twenty-five years deep, across MetroWest Boston.
The difference
Most projects pass through many hands. Yours passes through one team.
"Design-build" is a trade term for a simple idea: the company that draws your room is the company that builds it. It sounds small. It changes everything about how the project feels — and how it turns out.
How it often goes
- A salesperson quotes you a kit from a catalog.
- A designer draws something a different company has to figure out how to build.
- A general contractor hands the work to whoever's available.
- The permit is your problem — or an extra line item.
- When something needs attention later, nobody's sure whose job it is.
How we work
- The team that designs your room runs the build — every day of it.
- The design comes from the team that will run your build — every line is buildable, priced, and permitted.
- One team from the first sketch to the last trim board. Nothing gets lost in a handoff.
- We prepare the drawings and handle your town's reviews — historic districts, conservation, zoning.
- One call, decades later. We even service rooms we didn't build.
The result
How it turns out.
A room that looks like it was always there
Neighbors assume it came with the house. When design and build live under one roof, the roofline lands right, the trim matches, and the room reads as original — and buyers can tell built-right from bolted-on.
Comfort you feel in February
The part you never see is the part you feel — insulation, sealing, and structure executed exactly as drawn, because one team owns both. Warm in deep winter, cool in July, no drafts to chase. You can watch it go in further down this page.
Years of not thinking about it
Built right the first time means the room just works — mornings, dinners, decades. And if it ever needs attention, it's one call, to the company that built it.
The same team on every job — from the first sketch to the last trim board.
The build
Behind the walls, start to finish.
The comfort and the longevity live in the stages you never see — the structure, the insulation, the sealing. One team runs every one of them, on real MetroWest job sites like these.
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FoundationIt starts with a solid, dry base — a poured foundation and weather barrier, winter or not.
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WeatherproofingLeak barrier and flashing seal the wall connection — this is where leaks get prevented, before a single pane goes in.
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FramingOur own crew frames the structure — engineered to carry a glass roof through New England winters.
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Glass goes inFrame up, glass in, subfloor down — the room takes shape before the finishes land.
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InsulationThen the part you never see: spray foam into the ceiling, which is what makes an addition comfortable in January.
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FinishedThe finished room — a glass-roofed conservatory set in the trees.
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FinishedAnd from the yard: an addition that reads as if it was always part of the house.
The materials
ConservaGlass — the best glass in a sunroom, and only Four Seasons has it.
We build with the Four Seasons Sunrooms product system — engineered since 1975 by one of the largest sunroom manufacturers in the world. They make the system; we're the local team that designs it to your house, permits it, and builds it.
Every glass room we build uses ConservaGlass NXT, the manufacturer's own insulated glazing — and it is exclusive to Four Seasons. No other builder can put it in your room, because no other builder can buy it. Here is what that actually buys you.
ConservaGlass NXT vs. ordinary sunroom glass
Glass is the one part of a sunroom you cannot upgrade later without taking the room apart. This is the part of the spec sheet worth reading.
| Property | ConservaGlass NXT Exclusive to Four Seasons | Ordinary sunroom glass |
|---|---|---|
| Insulation | Up to R-7.7 on triple-glazed configurations | No comparable rating to point to — which is why so many older sunrooms get closed up for the winter |
| Summer heat | Blocks up to 85% of the sun's solar heat, with extra tinting and reflectivity on the roof glass | The light comes in and the heat comes with it — the July afternoon problem |
| Winter comfort | Low-E coatings and insulated glazing hold the warmth in, so the room stays usable in January | Cold radiates off the glass, and the room quietly stops getting used |
| Keeping it clean | A stay-clean coating: sunlight breaks down dirt and rain sheets it away — including the roof you can't reach | Someone has to wash it. Including the roof. |
| Safety | Tempered safety glass | Varies by system |
| Where you can get it | Exclusive to Four Seasons — it is their own glass, and we are your local Four Seasons team | Widely available, from anyone |
| Warranty | Backed by the Four Seasons Sunrooms manufacturer's warranty | Varies by manufacturer |
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Insulation
ConservaGlass NXT Up to R-7.7 on triple-glazed configurations
Ordinary glass No comparable rating to point to — which is why so many older sunrooms get closed up for the winter
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Summer heat
ConservaGlass NXT Blocks up to 85% of the sun's solar heat, with extra tinting and reflectivity on the roof glass
Ordinary glass The light comes in and the heat comes with it — the July afternoon problem
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Winter comfort
ConservaGlass NXT Low-E coatings and insulated glazing hold the warmth in, so the room stays usable in January
Ordinary glass Cold radiates off the glass, and the room quietly stops getting used
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Keeping it clean
ConservaGlass NXT A stay-clean coating: sunlight breaks down dirt and rain sheets it away — including the roof you can't reach
Ordinary glass Someone has to wash it. Including the roof.
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Safety
ConservaGlass NXT Tempered safety glass
Ordinary glass Varies by system
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Where you can get it
ConservaGlass NXT Exclusive to Four Seasons — it is their own glass, and we are your local Four Seasons team
Ordinary glass Widely available, from anyone
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Warranty
ConservaGlass NXT Backed by the Four Seasons Sunrooms manufacturer's warranty
Ordinary glass Varies by manufacturer
ConservaGlass NXT figures and warranty are the manufacturer's (Four Seasons Sunrooms). The coverage details — and how they apply to your room — are walked through at your consultation.
One name on the whole job
When our truck is in your driveway, the buck stops there.
No finger-pointing between a designer, a contractor, and a sub. The company that drew your roofline runs the job site — every step, start to finish — and answers the phone years later.
That's also why we're comfortable being judged by our work decades on: we still service and repair sunrooms across MetroWest, including rooms we didn't build.
You've done the reading. Let's design it.
You've seen the difference between a sunroom and a four-season room, and roughly what fits your house. A free in-home consultation turns that into a real design and an honest price for your home — no pressure. Tell us your town and what you're leaning toward.
By the time we visit, you already know roughly what you want. That's the point.
Already have a sunroom that needs work? Request a service evaluation →
Monday – Friday: 9:00 AM – 5:00 PM
Saturday: By appointment
Sunday: Closed