23 ATLANTIS ST
Single-family only (6,000 sf min lot) · 4,800 sq ft lot
Proposed district: RD-3 — Up to 3 units per lot · View city's proposed zoning map
Your existing property can stay exactly as it is.
This proposal changes what could be built here in the future. It does not require you to change, sell, or alter your property in any way.
What would change for your property?
Future buildings could be closer to the back property line
The minimum distance from the rear of a building to the back of your lot ("rear setback") would go from 30 feet to 10 feet. Existing structures are unaffected.
Future buildings could sit closer to the street
The minimum distance between your building and the street ("front setback") would go from 20 feet to 12 feet. Your existing structure is not affected — this only applies to new construction or major additions.
Side yard (cumulative) decreases from 20' to 15'
You could have up to 3 units on your lot
Today this property only allows a single-family dwelling. Under the proposal, you could choose to add an in-law suite, a rental unit, or convert to a multi-family — up to 3 units total. No one is required to change anything.
Your Property Today
Built
1929
Type
single fam
Current Units
1
Height
16 ft
Footprint
1,319 sf
27% of lot
Roof Style
Gable
Your Property vs. Current Zoning vs. Proposed
What your property actually has today, what current zoning allows, and what the proposal would allow.
| Rule | Your Property | Current Zoning | Proposed |
|---|---|---|---|
| HeightMaximum building height allowed | 16.20199951ft | 35ft | 35ft |
| StoriesHow many floors a building can have | 1 | 2.5 | 3↑ |
| Dwelling UnitsHow many separate units can be on this lot | 1 | 1 | 3↑ |
| Building Floor PlateMaximum footprint per floor of the building | 1,319 sf | — | 2,400 sf * |
| Front SetbackMinimum distance from house to street | — | 20ft | 12ft↓ |
| Side Yards (combined)Total of left + right side yard minimums | — | 10 ft/side (20 ft total) | 15ft total↓ |
| Rear SetbackMinimum distance from house to back property line | — | 30ft | 10ft *↓ |
| Lot CoverageMaximum % of lot that can be covered by buildings | 27% | No direct equivalent | 35% |
| Off-Street ParkingRequired off-street parking spaces | 4 spaces | 2spaces | 0spaces↓ |
| Permeable AreaMinimum % of lot that must be unpaved (grass, garden, etc.) | 36% | — | 30% |
Highlighted rows indicate a proposed change from current zoning. ↑ = allows more, ↓ = allows less. "Your Property" shows actual data where available.
* With the addition of dwelling units while retaining the existing building. New construction values may differ.
Accessory Dwelling Unit (ADU) Eligibility
Under the proposal, this property could build a detached ADU with a conditional-use permit, in addition to the main dwelling.
- Max floor plate: 900 sf (or main building footprint, whichever is less)
- Max height: 25 ft (or main building height, whichever is less)
- Max 2 stories (second must be a sloped-roof story)
- Must be at least 5 ft from any other structure on the lot
- One detached ADU per lot
- Owner-occupancy is no longer required
Non-detached ADUs (units within an existing building) count toward the district's unit maximum shown in the table above.
What about your neighbors?
See how the proposal affects other properties on your street and nearby.
Want to weigh in?
- Submit feedback to Boston Planning — the city wants to hear from residents like you
- Attend an upcoming meeting — ask questions in person or online
- Read the FAQ — common questions answered in plain English
See something wrong? We want to get this right.
Submit a CorrectionData: Boston GIS parcels, City assessor FY2026, draft zoning text (July 2026).