7 Basswood Lane
Andover, MA
Primary building
Accessory rear yard
The full-lot buildable envelope leaves a workable siting area after setbacks and dimensional rules are applied.
Lot size
30,492 sq ft
Zoning
SRB
Parcel
156-70
SRB zoning requirements
Single Residence B
Min lot area
30,000 sq ft
Min frontage
150 ft
Min width
120 ft
80% of frontage req.
Front yard
40 ft
Side yard
25 ft
Rear yard
30 ft
Map front setback: Map front setback matches the zoning front yard at 40 ft.
Buildable takeaway
Full-lot buildable envelope appears supportive
Confidence
Medium
Best next step
Confirm the frontage line, measuring edge, and setback starting point with a current survey or plot plan.
Full-lot buildable envelope
10,200 sq ft
Deterministic envelope summary: The deterministic screen leaves about 10,200 sq ft in the full-lot buildable envelope.
Recommendation: Use this as an early deterministic screen only. The next spend should go toward verifying the key measured assumptions, not toward detailed design.
Read the full reportWhy this remains interesting
The full-lot buildable envelope supports multiple footprint-fit tests.
The frontage edge resolves cleanly enough to run a deterministic dimensional pass.
No trusted mapped hard constraints are currently clipping the full-lot envelope.
What could still change the answer
Front setback from the street edge is the main dimensional limit on the west side.
Final siting should still be checked against a current survey before reliance.
Mapped overlays and survey geometry should still be confirmed before design reliance.
Overview
Address
7 Basswood Lane, Andover, MA
Municipality
Andover
Parcel reference
156-70
Zoning
SRB
Lot area
30,492 sq ft
Frontage
150 ft
Answer first
Full-lot buildable envelope appears supportive
The full-lot buildable envelope leaves a workable siting area after setbacks and dimensional rules are applied.
Envelope area
10,200 sq ft
Pct of lot
39% of lot
Footprint read
32 x 48 fits in 2 placements.
Full-lot buildable envelope
Full-lot buildable envelope
SupportiveWhere could a structure theoretically go on this lot under the zoning rules, if the site were cleared?
Area
10,200 sq ft
Pct of lot
39% of lot
Footprint read
32 x 48 fits in 2 placements.
The zoning-only pass leaves a broad cleared-lot siting zone after setbacks and width logic are applied.
Hard constraints applied
Front setback area
Side setback area
Rear setback area
Width corridor
Soft flags
No soft-constraint notes for this envelope.
What still needs review
No additional review reasons recorded.
Fit testing
Footprint tests are run against the full-lot buildable envelope using the fixed default library.
| Footprint | Result | Placements |
|---|---|---|
| 28 x 40 | Fits well | 3 |
| 32 x 48 | Fits well | 2 |
| 36 x 50 | Fits | 1 |
| 40 x 60 | Does not fit | 0 |
Constraints and confidence
What constrains the envelope most
Front setback from the street edge is the main dimensional limit on the west side.
Final frontage and measuring lines still need survey-level confirmation.
Final siting should still be checked against a current survey before reliance.
Full-lot buildable envelope appears supportive
The full-lot buildable envelope leaves a workable siting area after setbacks and dimensional rules are applied.
Confidence note: Confidence is medium because the base geometry is stable, but final siting still depends on survey confirmation.
Sources
Important note: This is a preliminary deterministic screen based on parcel geometry, current rules, mapped constraints, and current-site conditions. It is not a survey, site plan, or permit approval.