Can you build an ADU in Hyde Park, NY?

Greenbelt — The Schedule of Bulk Regulations sets NO minimum lot area anywhere in Hyde Park, and § 108-4.4 adds none — it controls height, size, coverage, yards and frontage only. What it publishes instead is a maximum AVERAGE density, here 0.4 dwelling units per acre, printed alongside as 2.5 acres per dwelling unit, which is what the land-per-unit figure carries. It is an average across a parcel rather than a floor under a single lot, so it does not by itself make a smaller lot unlawful. The only lot dimension the chapter does impose is frontage: no building permit issues for a lot with less than 25 ft of frontage on a street, and none at all below 15 ft without a variance (§ 108-4.4E). Coverage is IMPERVIOUS coverage — everything occupied, surfaced or covered by impervious material, buildings included — not building footprint (§ 108-4.4C). An accessory structure is capped at 22 ft against the 35 ft for a principal building, and one 15 ft or lower may stand at the full front setback but only half the side and rear, never closer than 5 ft; that relief does not apply to an accessory structure containing a dwelling unit, which takes the principal-building standards. A shed sets back 50 ft at the front and 5 ft at the side and rear. Every dwelling unit needs at least 400 sq ft of floor area and a least dimension of 16 ft. On a corner lot the side yard facing the side street must equal the front yard depth. The density excludes Army Corps and DEC regulated wetlands and everything inside the one-hundred-year flood hazard area from the parcel acreage before it is applied. Where the residual acreage after those deductions is 10 acres or less the basis is 2.0 acres per dwelling unit rather than 2.5, so a smaller parcel is allowed slightly more. For a solar farm approved under § 130-8 the impervious coverage limit is 25% rather than 15%.

Waterfront — The Schedule of Bulk Regulations sets NO minimum lot area anywhere in Hyde Park, and § 108-4.4 adds none — it controls height, size, coverage, yards and frontage only. What it publishes instead is a maximum AVERAGE density, here 0.4 dwelling units per acre, printed alongside as 2.5 acres per dwelling unit, which is what the land-per-unit figure carries. It is an average across a parcel rather than a floor under a single lot, so it does not by itself make a smaller lot unlawful. The only lot dimension the chapter does impose is frontage: no building permit issues for a lot with less than 25 ft of frontage on a street, and none at all below 15 ft without a variance (§ 108-4.4E). Coverage is IMPERVIOUS coverage — everything occupied, surfaced or covered by impervious material, buildings included — not building footprint (§ 108-4.4C). An accessory structure is capped at 22 ft against the 35 ft for a principal building, and one 15 ft or lower may stand at the full front setback but only half the side and rear, never closer than 5 ft; that relief does not apply to an accessory structure containing a dwelling unit, which takes the principal-building standards. A shed sets back 50 ft at the front and 5 ft at the side and rear. Every dwelling unit needs at least 400 sq ft of floor area and a least dimension of 16 ft. On a corner lot the side yard facing the side street must equal the front yard depth. The density excludes Army Corps and DEC regulated wetlands and everything inside the one-hundred-year flood hazard area from the parcel acreage before it is applied. Where the residual acreage after those deductions is 10 acres or less the basis is 2.0 acres per dwelling unit rather than 2.5. For a solar farm approved under § 130-8 the impervious coverage limit is 25% rather than 15%.

Neighborhood — The Schedule of Bulk Regulations sets NO minimum lot area anywhere in Hyde Park, and § 108-4.4 adds none — it controls height, size, coverage, yards and frontage only. What it publishes instead is a maximum AVERAGE density, here 2 dwelling units per acre, which is what the land-per-unit figure carries. It is an average across a parcel rather than a floor under a single lot, so it does not by itself make a smaller lot unlawful. The only lot dimension the chapter does impose is frontage: no building permit issues for a lot with less than 25 ft of frontage on a street, and none at all below 15 ft without a variance (§ 108-4.4E). Coverage is IMPERVIOUS coverage — everything occupied, surfaced or covered by impervious material, buildings included — not building footprint (§ 108-4.4C). An accessory structure is capped at 22 ft against the 35 ft for a principal building, and one 15 ft or lower may stand at the full front setback but only half the side and rear, never closer than 5 ft; that relief does not apply to an accessory structure containing a dwelling unit, which takes the principal-building standards. A shed sets back 50 ft at the front and 5 ft at the side and rear. Every dwelling unit needs at least 400 sq ft of floor area and a least dimension of 16 ft. On a corner lot the side yard facing the side street must equal the front yard depth.

Neighborhood Core — The Schedule of Bulk Regulations sets NO minimum lot area anywhere in Hyde Park, and § 108-4.4 adds none — it controls height, size, coverage, yards and frontage only. What it publishes instead is a maximum AVERAGE density, here 4 dwelling units per acre, which is what the land-per-unit figure carries. It is an average across a parcel rather than a floor under a single lot, so it does not by itself make a smaller lot unlawful. The only lot dimension the chapter does impose is frontage: no building permit issues for a lot with less than 25 ft of frontage on a street, and none at all below 15 ft without a variance (§ 108-4.4E). Coverage is IMPERVIOUS coverage — everything occupied, surfaced or covered by impervious material, buildings included — not building footprint (§ 108-4.4C). An accessory structure is capped at 22 ft against the 35 ft for a principal building, and one 15 ft or lower may stand at the full front setback but only half the side and rear, never closer than 5 ft; that relief does not apply to an accessory structure containing a dwelling unit, which takes the principal-building standards. A shed sets back 30 ft at the front and 5 ft at the side and rear. Every dwelling unit needs at least 400 sq ft of floor area and a least dimension of 16 ft. On a corner lot the side yard facing the side street must equal the front yard depth. The gross floor area of any one use or structure is capped at 6,000 sq ft, which does not apply to one- and two-family dwellings, animal husbandry or agriculture.

Hamlet — The Schedule of Bulk Regulations sets NO minimum lot area anywhere in Hyde Park, and § 108-4.4 adds none — it controls height, size, coverage, yards and frontage only. What it publishes instead is a maximum AVERAGE density, here 4 dwelling units per acre, which is what the land-per-unit figure carries. It is an average across a parcel rather than a floor under a single lot, so it does not by itself make a smaller lot unlawful. The only lot dimension the chapter does impose is frontage: no building permit issues for a lot with less than 25 ft of frontage on a street, and none at all below 15 ft without a variance (§ 108-4.4E). Coverage is IMPERVIOUS coverage — everything occupied, surfaced or covered by impervious material, buildings included — not building footprint (§ 108-4.4C). An accessory structure is capped at 22 ft against the 35 ft for a principal building, and one 15 ft or lower may stand at the full front setback but only half the side and rear, never closer than 5 ft; that relief does not apply to an accessory structure containing a dwelling unit, which takes the principal-building standards. A shed sets back 20 ft at the front and 5 ft at the side and rear. Every dwelling unit needs at least 400 sq ft of floor area and a least dimension of 16 ft. On a corner lot the side yard facing the side street must equal the front yard depth.

Hamlet Core — The Schedule of Bulk Regulations sets NO minimum lot area anywhere in Hyde Park, and § 108-4.4 adds none — it controls height, size, coverage, yards and frontage only. What it publishes instead is a maximum AVERAGE density, here 6 dwelling units per acre, which is what the land-per-unit figure carries. It is an average across a parcel rather than a floor under a single lot, so it does not by itself make a smaller lot unlawful. The only lot dimension the chapter does impose is frontage: no building permit issues for a lot with less than 25 ft of frontage on a street, and none at all below 15 ft without a variance (§ 108-4.4E). Coverage is IMPERVIOUS coverage — everything occupied, surfaced or covered by impervious material, buildings included — not building footprint (§ 108-4.4C). An accessory structure is capped at 22 ft against the 40 ft for a principal building, and one 15 ft or lower may stand at the full front setback but only half the side and rear, never closer than 5 ft; that relief does not apply to an accessory structure containing a dwelling unit, which takes the principal-building standards. A shed sets back 10 ft at the front and 5 ft at the side and rear. Every dwelling unit needs at least 400 sq ft of floor area and a least dimension of 16 ft. On a corner lot the side yard facing the side street must equal the front yard depth.

Crossroads Core — The Schedule of Bulk Regulations sets NO minimum lot area anywhere in Hyde Park, and § 108-4.4 adds none — it controls height, size, coverage, yards and frontage only. What it publishes instead is a maximum AVERAGE density, here 10 dwelling units per acre, which is what the land-per-unit figure carries. It is an average across a parcel rather than a floor under a single lot, so it does not by itself make a smaller lot unlawful. The only lot dimension the chapter does impose is frontage: no building permit issues for a lot with less than 25 ft of frontage on a street, and none at all below 15 ft without a variance (§ 108-4.4E). Coverage is IMPERVIOUS coverage — everything occupied, surfaced or covered by impervious material, buildings included — not building footprint (§ 108-4.4C). An accessory structure is capped at 22 ft against the 40 ft for a principal building, and one 15 ft or lower may stand at the full front setback but only half the side and rear, never closer than 5 ft; that relief does not apply to an accessory structure containing a dwelling unit, which takes the principal-building standards. A shed sets back 10 ft at the front and 5 ft at the side and rear. Every dwelling unit needs at least 400 sq ft of floor area and a least dimension of 16 ft. On a corner lot the side yard facing the side street must equal the front yard depth. The front and side yards may both be reduced to ZERO subject to the Crossroads Core standards.

Landing — The Schedule of Bulk Regulations sets NO minimum lot area anywhere in Hyde Park, and § 108-4.4 adds none — it controls height, size, coverage, yards and frontage only. What it publishes instead is a maximum AVERAGE density, here 10 dwelling units per acre, which is what the land-per-unit figure carries. It is an average across a parcel rather than a floor under a single lot, so it does not by itself make a smaller lot unlawful. The only lot dimension the chapter does impose is frontage: no building permit issues for a lot with less than 25 ft of frontage on a street, and none at all below 15 ft without a variance (§ 108-4.4E). Coverage is IMPERVIOUS coverage — everything occupied, surfaced or covered by impervious material, buildings included — not building footprint (§ 108-4.4C). An accessory structure is capped at 22 ft against the 35 ft for a principal building, and one 15 ft or lower may stand at the full front setback but only half the side and rear, never closer than 5 ft; that relief does not apply to an accessory structure containing a dwelling unit, which takes the principal-building standards. A shed sets back 10 ft at the front and 5 ft at the side and rear. Every dwelling unit needs at least 400 sq ft of floor area and a least dimension of 16 ft. On a corner lot the side yard facing the side street must equal the front yard depth. A lot fronting on the Hudson River may build water-dependent structures into the river with U.S. Army Corps of Engineers approval.

East Park Business District — The Schedule of Bulk Regulations sets NO minimum lot area anywhere in Hyde Park, and § 108-4.4 adds none — it controls height, size, coverage, yards and frontage only. What it publishes instead is a maximum AVERAGE density, here 8 dwelling units per acre, which is what the land-per-unit figure carries. It is an average across a parcel rather than a floor under a single lot, so it does not by itself make a smaller lot unlawful. The only lot dimension the chapter does impose is frontage: no building permit issues for a lot with less than 25 ft of frontage on a street, and none at all below 15 ft without a variance (§ 108-4.4E). Coverage is IMPERVIOUS coverage — everything occupied, surfaced or covered by impervious material, buildings included — not building footprint (§ 108-4.4C). An accessory structure is capped at 22 ft against the 40 ft for a principal building, and one 15 ft or lower may stand at the full front setback but only half the side and rear, never closer than 5 ft; that relief does not apply to an accessory structure containing a dwelling unit, which takes the principal-building standards. A shed sets back 20 ft at the front and 5 ft at the side and rear. Every dwelling unit needs at least 400 sq ft of floor area and a least dimension of 16 ft. On a corner lot the side yard facing the side street must equal the front yard depth. The gross floor area of any one use or structure is capped at 40,000 sq ft, which does not apply to one- and two-family dwellings, animal husbandry or agriculture.

Neighborhood Business District — The Schedule of Bulk Regulations sets NO minimum lot area anywhere in Hyde Park, and § 108-4.4 adds none — it controls height, size, coverage, yards and frontage only. What it publishes instead is a maximum AVERAGE density, here 8 dwelling units per acre, which is what the land-per-unit figure carries. It is an average across a parcel rather than a floor under a single lot, so it does not by itself make a smaller lot unlawful. The only lot dimension the chapter does impose is frontage: no building permit issues for a lot with less than 25 ft of frontage on a street, and none at all below 15 ft without a variance (§ 108-4.4E). Coverage is IMPERVIOUS coverage — everything occupied, surfaced or covered by impervious material, buildings included — not building footprint (§ 108-4.4C). An accessory structure is capped at 22 ft against the 40 ft for a principal building, and one 15 ft or lower may stand at the full front setback but only half the side and rear, never closer than 5 ft; that relief does not apply to an accessory structure containing a dwelling unit, which takes the principal-building standards. A shed sets back 20 ft at the front and 5 ft at the side and rear. Every dwelling unit needs at least 400 sq ft of floor area and a least dimension of 16 ft. On a corner lot the side yard facing the side street must equal the front yard depth. The gross floor area of any one use or structure is capped at 7,500 sq ft, which does not apply to one- and two-family dwellings, animal husbandry or agriculture.

Corridor Business District — The Schedule of Bulk Regulations sets NO minimum lot area anywhere in Hyde Park, and § 108-4.4 adds none — it controls height, size, coverage, yards and frontage only. What it publishes instead is a maximum AVERAGE density, here 8 dwelling units per acre, which is what the land-per-unit figure carries. It is an average across a parcel rather than a floor under a single lot, so it does not by itself make a smaller lot unlawful. The only lot dimension the chapter does impose is frontage: no building permit issues for a lot with less than 25 ft of frontage on a street, and none at all below 15 ft without a variance (§ 108-4.4E). Coverage is IMPERVIOUS coverage — everything occupied, surfaced or covered by impervious material, buildings included — not building footprint (§ 108-4.4C). An accessory structure is capped at 22 ft against the 40 ft for a principal building, and one 15 ft or lower may stand at the full front setback but only half the side and rear, never closer than 5 ft; that relief does not apply to an accessory structure containing a dwelling unit, which takes the principal-building standards. A shed sets back 10 ft at the front and 5 ft at the side and rear. Every dwelling unit needs at least 400 sq ft of floor area and a least dimension of 16 ft. On a corner lot the side yard facing the side street must equal the front yard depth. The gross floor area of any one use or structure is capped at 65,000 sq ft, which does not apply to one- and two-family dwellings, animal husbandry or agriculture.

Town Core District — The Schedule of Bulk Regulations carries a Town Core column and fills every cell in it with a footnote: the bulk regulations for TC are set out in the Town Core Design and Development Standards, not in this chapter, so no figure is recorded here. Where the Planning Board has approved a building type waiver permit, the Corridor Business District standards apply instead — 40 ft of height, 85% impervious coverage, and 10 ft front, 5 ft side and 20 ft rear yards. The town-wide 25 ft frontage requirement applies here as everywhere (§ 108-4.4E).