Project Spotlight: Garage-to-Guest House Addition in Guilford, CT

This was a second-story addition over an existing two-bay garage, turning a utilitarian structure into a two-story building with a complete guest residence upstairs. The existing 8" block foundation and garage slab stayed in place; we reinforced as needed, framed a new second floor, and built up into a hip roof.

The upstairs was designed as a true stand-alone suite. It includes two bedrooms with a shared full bath and laundry off the hall, as well as an open kitchen-and-living area with a dramatic vaulted ceiling (14'6" at its peak) anchored by a 36" ventable skylight over the hall to pull daylight deep into the plan. Because the clients split their time between Guilford and Manhattan, the space needed to work as comfortable, low-maintenance quarters that guests could live in independently.

The material palette is clean and warm rather than flashy: black-framed casement and double-hung windows against cedar-shingle siding outside, and inside a mix of Carrara marble, a soft green tile bath, paint-grade cabinetry, white oak floors, and polished-nickel fixtures. Barn doors, a pocket door, and custom trim tie the small footprint together.

What was done

• Built a new second floor over the existing garage, keeping the foundation and slab and adding a full guest suite: two bedrooms, a shared full bath, a laundry, and an open kitchen/living room.
• Framed a vaulted living/kitchen ceiling and installed a 36" x 36" ventable skylight above the hall to bring light into the center of the plan.
• Added a new deck with cedar decking and a cedar-post-and-cable-rail system, plus an exterior stairway for access to the second floor.
• Re-sided and re-roofed the whole structure – cedar-shingle siding, architectural asphalt roof with continuous ridge and soffit venting – and ran all new HVAC, plumbing, and electrical to the addition, including a septic tie-in and utility trenching back to the main house.

Challenge 2: Appliance Delivery Delays

Late in the project, the appliance delivery got tangled up in the appliance company's own scheduling. A delivery that was supposed to happen got pulled off their schedule, and the refrigerator in particular kept slipping; we chased down several different "estimated arrival" dates before it finally landed.

Solution: We stayed on the appliance company with repeated calls to get the delivery rescheduled and coordinated it around the client's travel so someone was on site to review everything. We kept the rest of the punch list moving so the appliances were the only thing waiting, not the reverse.

• Design & Permitting: Began winter 2025 (plans went through numerous revisions from January through the June 17, 2025 construction set). Trades day, plan submittal to the Town of Guilford, survey, and permitting ran through the spring and summer.

• Handoff to Production: Mid-August 2025

• Build Start: August 18, 2025 (on schedule)

• Baseline Completion Target: April 15, 2026

• Final Walkthrough: Early May 2026

Older structures and additions are unpredictable: town permitting timelines, hitting ledge in the ground, and appliance delivery delays can all add time. Despite those factors, careful up-front planning and a steady production schedule kept the build itself moving predictably from demo through the punch list.

Every project has a few things that really stand out. Here are our favorites from 125 West Lane.

• The vaulted living/kitchen ceiling: Reaching nearly 15 feet at the peak, it features a skylight over the hall that floods the center of the apartment with light.

• The cedar deck and cable railing: Built with cedar decking, cedar posts, a cable-wire rail system, and an exterior stair that gives the suite its own front door.

• The bath: Features Carrara marble, a Casablanca checkerboard marble floor, and soft Aloe Green wall tile.

• The details: Includes barn doors on the bedrooms, a pocket door with an edge pull, and Studio McGee polished-nickel fixtures throughout.

We loved working on this one. Adding a full home on top of an existing garage without losing the space below or making the finished building look like an afterthought is exactly the kind of problem we enjoy solving. The clients were engaged and thoughtful throughout, catching details on site, weighing in on finishes, and trusting us to steer them away from choices (like that shower-door cutout) that were not right for their family.

There were a few bumps, such as ledge in the ground, trim material we had to redo, and an appliance company that tested our patience. However, none of them changed the outcome. What mattered was designing a space that fits how this family actually lives, providing private, low-maintenance quarters that feel just as considered as the main house, wrapped in a building that looks like it has always been there.

The end result is a guest house the whole family will enjoy for years. And that's what matters most.