Lot coverage is one of the most overlooked zoning rules when homeowners think about ADUs. Under City of Yes, zoning may allow ADUs, but lot coverage limits often restrict how much of the property can actually be built on. This rule quietly eliminates many proposed ADU designs.

What Lot Coverage Means

Lot coverage refers to the percentage of the lot that can be occupied by buildings. Existing homes, garages, sheds and additions all count toward coverage. An ADU must fit within the remaining allowable coverage.

If a lot is already close to its limit, there may be no room for an additional structure.

Why This Stops ADUs

• Many Staten Island lots already max out coverage due to additions.

• Rear yard garages often consume remaining buildable area.

• Detached ADUs count fully toward coverage limits.

• Removing structures may be required before adding an ADU.

Lot coverage is calculated strictly. There is little flexibility without variances.

What Homeowners Should Check First

• Existing lot coverage percentage

• Whether sheds or garages are counted

• Zoning district coverage limits

• Whether removal of structures is allowed

• Impact on required open space

Zoning may say ADUs are allowed. Lot coverage decides whether one fits.

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Joseph Ranola | Five-Star Staten Island & South Brooklyn Realtor® (30 + Google reviews)
Associate Broker · Matias Real Estate | Founder · Bridge & Boro Team
Serving 103xx and 11209 / 11214 / 11228 | $25 M + closed volume
📞 917-716-1496 | ranolarealestate.com