Staten Island ADU Guide: NYC's Best-Kept Secret for Homeowners

if you're looking at building an accessory dwelling unit in NYC, you've probably been reading about brooklyn and queens. makes sense — they get all the press. but there's a borough that quietly beats both of them on almost every metric that matters for ADU construction: staten island.

with 11,500 eligible properties, the largest average lot sizes in the city, and construction costs that come in well below the other boroughs, staten island is the best-kept secret in NYC's ADU landscape. let's break down exactly why — and what you need to know to build one.

why staten island is ideal for ADUs

the numbers tell the story. staten island has structural advantages that no other borough can match:

• 11,500 eligible properties — that's a massive pool of homes that qualify under the new ADU rules
• largest lots in NYC — average lot sizes run 3,000–5,000 sq ft, giving you actual room to build a detached backyard ADU
• most detached single-family homes — the borough is dominated by R3-1, R3-2, and R3X zoning districts, which are the sweet spot for ADU eligibility
• lower property values — median home prices around $550K–$650K vs. $900K+ in brooklyn, which means your ADU investment represents a larger percentage improvement to total property value
• suburban-scale infrastructure — driveways, garages, and yard space that make construction logistics significantly easier than building in dense brooklyn neighborhoods

in the other boroughs, you're often limited to basement conversions or garage conversions because the lots are too small for a new detached structure. on staten island, a full backyard cottage ADU is a realistic option for thousands of homeowners.

top neighborhoods for ADU construction

not every part of staten island is equally suited for ADUs. here are the neighborhoods where the conditions are best:

new dorp

new dorp sits in the heart of the island's residential core. lot sizes here typically range from 3,500–5,000 sq ft, and the neighborhood is almost entirely R3-2 zoning. the area has strong rental demand from families priced out of brooklyn and manhattan, with one-bedroom rents running $1,600–$1,900/mo. construction access is straightforward — most properties have driveways and street parking for contractor vehicles.

tottenville

at the southern tip of the island, tottenville offers some of the largest lots you'll find anywhere in NYC — many properties clock in at 4,000–6,000+ sq ft. it's R3-1 and R3X zoning, with a quiet suburban feel that appeals to tenants looking for space. rents are slightly lower ($1,500–$1,800/mo) due to the distance from the ferry, but construction costs are also lower because of easier site access and less neighborhood congestion.

great kills

great kills has a strong mix of lot sizes (3,000–4,500 sq ft) and solid rental demand. it's close to the Staten Island Railway, which helps with tenant appeal. one-bedroom ADU rents here run $1,600–$2,000/mo. the neighborhood has a good number of R3-2 zoned properties, and the building department is familiar with the area — which can help permits move a bit faster.

eltingville

eltingville rounds out the top four with consistent R3-2 zoning, lots averaging 3,500–4,500 sq ft, and a family-oriented neighborhood character that supports stable, long-term tenancies. rents in the $1,500–$1,900/mo range. it's centrally located on the island, making it convenient for both tenants and contractors.

what it costs to build an ADU on staten island

construction costs on staten island generally come in at the lower end of the NYC range:

ADU type	size range	cost range	cost per sq ft
detached backyard cottage	400–800 sq ft	$150K–$250K	$280–$375
garage conversion	350–600 sq ft	$100K–$180K	$250–$320
basement conversion	500–900 sq ft	$100K–$200K	$180–$250
above-garage addition	400–700 sq ft	$130K–$220K	$300–$350

these numbers include permits, architectural plans, site prep, utility connections, and interior finishes. they do not include furniture or landscaping.

why is staten island cheaper? several reasons:

• easier site access — contractors don't have to deal with narrow brooklyn streets, alternate side parking, or carrying materials through shared driveways
• less foundation work — many SI properties have soil conditions that require simpler foundations than waterfront areas in other boroughs
• more contractor availability — there's a healthy pool of licensed contractors who live and work on the island, reducing travel costs
• simpler utility connections — many properties already have the infrastructure capacity for an additional unit

rental income potential

ADU rental income on staten island won't match park slope or astoria numbers, but the return on investment is often better because your build costs are lower:

ADU type	monthly rent	annual income	typical build cost	simple payback
studio/1BR cottage	$1,500–$2,200	$18K–$26.4K	$150K–$250K	7–12 years
basement 1BR	$1,400–$1,800	$16.8K–$21.6K	$100K–$200K	5–10 years
garage conversion studio	$1,400–$1,700	$16.8K–$20.4K	$100K–$180K	5–9 years

at the mid-range — a $175K build renting for $1,800/mo — you're looking at $21,600/year in gross rental income and a payback period of about 8 years. after that, it's nearly pure profit (minus maintenance, insurance, and taxes).

zoning details for staten island ADUs

most ADU-eligible properties on staten island fall into these zoning districts:

• R3-1 — detached homes, 3,800 sq ft minimum lot. ADUs allowed as detached, attached, or conversion.
• R3-2 — detached and semi-detached homes, 2,850 sq ft minimum lot. the most common zoning for ADU-eligible properties on SI.
• R3X — detached homes on larger lots (3,325 sq ft minimum). great for backyard cottages because of generous rear yard requirements.
• R3A — contextual district, detached homes. slightly more restrictive but still ADU-eligible.

the key requirements across all these districts: your lot must have an existing one- or two-family home, the ADU can't exceed 800 sq ft or 33% of the floor area of the primary home (whichever is less), and you need to maintain the required rear yard setback.

use the nycadu eligibility checker to see exactly what's allowed on your specific lot.

the ferry factor

let's address the elephant in the room: the commute. staten island's distance from manhattan is both its biggest weakness and — for ADU purposes — its biggest strength.

the weakness is obvious: tenants who work in manhattan face a 60–90 minute commute via the ferry and subway. this limits your tenant pool compared to brooklyn or queens.

but here's the flip side: remote work has permanently expanded the pool of people who don't need a daily manhattan commute. for these tenants, a $1,700/mo ADU on staten island with a backyard is dramatically more appealing than a $2,500/mo studio apartment in bushwick. and staten island's cost of living is 15–20% lower than the other boroughs, which further helps with tenant recruitment.

tenants who work on the island, in new jersey (via the Goethals or Outerbridge), or remotely are your primary market. and that market is growing.

permits and process on staten island

the permit process is the same as the rest of NYC — everything goes through DOB — but staten island has a practical advantage: lower volume. the DOB borough office on staten island processes fewer applications than brooklyn or queens, which can mean faster review times.

typical timeline for a staten island ADU:

• design + plans: 4–8 weeks
• permit review: 4–12 weeks (faster if using pre-approved plans)
• construction: 12–24 weeks depending on ADU type
• certificate of occupancy: 2–4 weeks after final inspection

total timeline: 6–12 months, which is on the shorter end for NYC ADU projects.

property value impact

adding an ADU on staten island typically increases property value by 15–25%. on a $600K home, that's $90K–$150K in equity — plus you're earning rental income on top of that.

this is actually a higher percentage increase than the other boroughs because SI's base property values are lower. a $200K ADU build on a $600K property is a 33% investment relative to home value. the same build on a $1.2M brooklyn home is only 17%.

next steps for staten island homeowners

if you're a staten island homeowner considering an ADU, here's where to start:

1. check your eligibility — use the nycadu eligibility checker to confirm your lot qualifies
2. review the pre-approved plans — the 10 pre-approved designs can save you 4–8 weeks on permits and $5K–$15K on architectural fees
3. understand financing — the Plus One ADU Program offers up to $395K in financing specifically for NYC ADU construction
4. get contractor quotes — aim for 3+ quotes from licensed NYC contractors with ADU experience
5. talk to your neighbors — not required, but community buy-in makes everything smoother

staten island might not have the name recognition of brooklyn when it comes to NYC real estate innovation, but for ADU construction, the math is clear: bigger lots, lower costs, and strong returns. the borough is ready — the question is whether you are.