Budget Breakdown: They Turned Their Sad Garage in Queens Into an Airy "Living Annex" for $100K

The renovation, completed in anticipation of NYC’s new ADU laws, shows that the borough’s many disused backyard units are full of potential.

According to John Patrick Cunningham, building in New York is a lot like filing your taxes. "It's like, ‘What can you write off as an expense?’" says the Brooklyn architect. "There's a lot of gray area about what you can do and if people will give you a fuss about it." Combing through complicated codes, sleuthing for loopholes, and maximizing your returns are par for the course. "It’s always a negotiation," he adds. This approach was particularly relevant for a recent project of his, the conversion of a dilapidated backyard shed in Queens into a serene indoor/outdoor "living annex."

In Forest Hills, Queens, architect John Patrick Cunningham renovated a crumbling garage into a 350-square-foot indoor/outdoor

Small garages that have fallen into disrepair stand behind many single-family homes in Queens because it’s challenging to renovate them. Many are no longer in compliance with setbacks, which presents a problem: they’re crumbling, but if you tear them down, you can’t build something new to replace them. Meanwhile, the driveways leading to them are too narrow to drive down. So many become storage sheds.

In 2024, New York City legalized the construction of ADUs across the five boroughs, allowing homeowners of single- and two-family homes to convert attics, cellars, basements, and free-standing or adjacent buildings into an ADU. While the law hadn’t yet passed when Cunningham began working with a family in Queens, they were aware of the potential policy change. They came to him in early 2024 with a 350-square-foot backyard shed with a caved-in roof and a $100,000 budget to renovate it. The Forest Hills residents sought a space that could flex between home office and a craft/playroom for their two children, and make their backyard more livable.

Editor’s Note: General contractor fees are included in costs.

$5,000
Interior Framing & Insulation
$10,000
Roof Framing & Insulation
$9,000
Structural Reinforcement of Existing CMU Wall
$6,000
CMU Storage Addition in Rear
$5,000
Exterior Siding and Soffits
$5,500
Wall Finishes
$6,500
Flooring
$4,000
Roofing - Architectural Asphalt Shingles
$4,000
Roofing- Gutters
$13,200
Electrical and Lighting
$6,000
Landscaping - Sod
$20,000
Landscaping - Paving
$15,500
Windows & Exterior Doors
$3,500
Interior Doors
$1,964
Permitting
$11,757.50
Architect/Design Fee
$11,000
Demolition & Waste / Debris Removal

Grand Total: $137,921.50
Cunningham’s clients sought a true indoor/outdoor space so he installed two sets of glass doors from Gamco that the family can swing wide open.
The living annex’s design is straightforward, but feels warm and interesting thanks to materials like linoleum floors from Forbo in the colorway Indigo Milk, a beadboard ceiling with materials from Dyke’s Lumber, and a jute rug from One King’s Lane.

See the full story on Dwell.com: Budget Breakdown: They Turned Their Sad Garage in Queens Into an Airy "Living Annex" for $100K
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