Custom composite decks for Somerville homes — Trex and TimberTech certified installer. Designs built for tight urban lots, multi-family buildings, and rooftop applications where every square foot of outdoor space counts. Google Guaranteed. 150+ five-star reviews.






Outdoor space is scarce in Somerville. At 4.2 square miles with 81,000 residents, the city is the densest in New England — and backyards are either tiny or nonexistent. A well-designed deck turns a narrow rear yard, an unused flat roof section, or an awkward side space into the outdoor room your property doesn’t otherwise have.
CUSTOMER FEEDBACK ・ HEAR FROM OUR CLIENTS
5.0 Stars Across 150+ Reviews
Posted on Curtis MatthewsTrustindex verifies that the original source of the review is Google. Our house in Danvers needed new siding and trim, and this was not an easy project. There were surprises once the old siding came off, but John walked us through everything calmly and professionally. The final result looks incredible and feels built to last.Posted on Joshua DixTrustindex verifies that the original source of the review is Google. Very professional operation. Clear contract, good communication, and high-quality work. Our new roof looks great and the flashing details are far better than what we had before.Posted on Imani YussifTrustindex verifies that the original source of the review is Google. We’re in Marblehead, close to the water, and needed exterior work that could actually stand up to the elements. D&G Exteriors replaced our roof and trim, and the difference in quality compared to previous work on the house is obvious.Posted on Miguel RojasTrustindex verifies that the original source of the review is Google. John took the time to explain things without talking down to us, which we really appreciated. The siding project went smoothly and the house looks brand new.Posted on Isaiah TuckerTrustindex verifies that the original source of the review is Google. We hired D&G Exteriors for new windows and couldn’t be happier. Everything operates smoothly, looks great, and the install was clean and precise. Would absolutely recommend them.Posted on Owen EllingtonTrustindex verifies that the original source of the review is Google. Five stars all around. Roof, trim, gutters all look wonderful! D&G Exteriors earned our trust and our future business.Posted on Gabriel GarrettTrustindex verifies that the original source of the review is Google. We had storm damage to our roof and needed someone we could trust. John handled everything professionally and didn’t push unnecessary repairs. The roof looks great and we feel confident it’ll hold up long term.Posted on Mielle ButlerTrustindex verifies that the original source of the review is Google. Great communication. Quality workmanship. No BS. Would hire D&G Exteriors again without hesitation.Posted on Zamer GambrellTrustindex verifies that the original source of the review is Google. We live right on the ocean in Gloucester, and the weather absolutely beats up our house — constant wind, salt spray, storms rolling in off the water. After years of patching things, we finally decided to hire D&G Exteriors for a full roof replacement and some badly needed trim repairs. I’m so glad we did. Working on a house this close to the shoreline is no simple job. The crew had to deal with strong winds almost every day, and once they pulled the old shingles off, we found sections of the roof deck that were softened from years of salt exposure. John didn’t overreact or try to turn it into a huge problem — he showed us the damage, explained what needed to be replaced, and kept everything straightforward and fair. Despite the tough conditions, the team worked cleanly and efficiently. You could tell they were used to handling challenging environments. They installed new CertainTeed shingles, repaired the compromised areas, and replaced all the rotten fascia and trim with PVC so we won’t have to worry about it again. The house looks incredible now — sharper lines, cleaner edges, and a roof that finally feels like it can handle a real coastal storm. The best part was how professional the whole process was. They kept the site tidy even with the wind constantly blowing debris around, communicated every day, and never left us guessing about what was happening next. If you live anywhere near the water and need roofing or exterior work, D&G Exteriors is absolutely the company you want. Five stars, without hesitation.Posted on brian haskinsTrustindex verifies that the original source of the review is Google. We’re in Ipswich, and hired D&G Exteriors to replace our roof and correct a long-standing issue around a valley that had leaked during heavy rain for years. Previous repairs never fully solved it. John identified the problem immediately, reworked the flashing detail, and rebuilt that section properly instead of just patching it again. Since the replacement, we’ve been through multiple hard storms with zero issues. The roof looks great, but more importantly, the problem is finally gone. Very happy with the work and the attention to detail.
Every deck starts with one question: how do you want to use this space? In Somerville, the answer matters more than most places because the space is limited and the design has to be smart.

Understanding how you plan to use the space. In Somerville, outdoor space is at a premium, so the answer shapes everything — entertaining, a quiet retreat, container gardening, a grilling station, a play area. The layout, size, materials, and structural requirements all flow from how you’ll actually live on the deck.
Most composite deck projects range from $25,000 to $75,000+ depending on size, materials, railing systems, and features. Somerville’s urban conditions — elevated builds, multi-family attachment points, rooftop applications — can add structural complexity that pushes toward the higher end. Detailed estimate after on-site consultation.
Trex and TimberTech/Azek. Both are premium composites that won’t rot, warp, or splinter. We help you choose based on color, texture, budget, and use. As a certified installer for both brands, we activate full manufacturer warranties.
In many cases, yes — but it depends on the building’s structural capacity and local zoning. Rooftop decks require structural engineering review, proper waterproofing of the roof membrane below, railing systems that meet code, and permitting. We assess feasibility before committing to a design.
Yes. Somerville requires building permits for new decks and most major replacements. The city’s Inspectional Services department reviews structural plans and conducts inspections at key stages. We handle all of it — plan preparation, submission, and inspection coordination.
Yes — and that’s the norm here. Zero lot lines, narrow side yards, and compact rear spaces are standard Somerville conditions. We design around the constraints with creative layouts, multi-level designs, and built-in features that maximize every square foot without violating setback requirements.
Pressure-treated is cheaper upfront but needs annual staining, sealing, and maintenance. It warps, splinters, and degrades in Middlesex County weather — and on a Somerville deck where neighbors are close by, a deteriorating deck is hard to ignore. Composite costs more initially but requires zero maintenance, won’t rot, and holds its appearance for decades.
Yes. If your existing deck is failing — rotted framing, wobbly railings, soft spots — we tear it down, inspect the ledger connection and building attachment, and rebuild to current code. Many older Somerville decks were built with substandard framing or before current ledger flashing requirements existed.
We provide complete roofing services (roof replacement and roof repair), metal roofing, siding, windows, and decks in Somerville, MA.