Brockton, MA Building Setbacks & Zoning: Setback Rules (2026)
Key Facts
- R-1A yards
- 30 ft front, 50 ft rear, 20 ft side min
- R-2/R-3 yards
- 20 ft front, 25 ft rear, 10 ft side min
- R-4 one-to-three-family
- 35 ft front, 50 ft rear, 20 ft side
- R-4 multi-family
- 20 ft front/rear, 10 ft side
- Irregular lots
- Side yard may average, never below half minimum
- Enforcement
- Inspector of buildings withholds permit, § 27-51
Summary
Brockton's Table 1 sets minimum yards by residential zone: a 30-foot front and 50-foot rear in R-1A, 30-foot rears in R-1B/C, 20-foot fronts and 25-foot rears in R-2 and R-3, and separate figures in R-4 for one-to-three-family versus multi-family lots. Section 27-17 lets the side yard flex around irregular lots and sets corner-lot and projection rules.
Yards (Minimum in feet) Front 30 30 30 20 20 35 20 One side 20 15 15 10 10 20 Rear 50 30 30 25 25 50 20
...Where the side wall of a building is not parallel with the side lot line or is broken or otherwise irregular, the side yard may be varied. In such case the average width of the side yard shall not be less than the otherwise required minimum width; provided, however, that such side yard shall not be narrower at any point than one-half the otherwise required minimum width.
Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: Code of Ordinances: Supplement 28).
Full Breakdown
Table 1 of § 27-9 fixes Brockton's yard minimums. Front yards run 30 feet in R-1A, R-1B and R-1C, and drop to 20 feet in R-2 and R-3. Rear yards run 50 feet in R-1A, 30 feet in R-1B and R-1C, and 25 feet in R-2 and R-3. Combined side yards in R-1A must total 50 feet with neither side narrower than 20 feet; in R-1B and R-1C the combined side yard drops to 30 feet with a 15-foot minimum on either side; in R-2 and R-3 it drops again to a 20-foot combined side yard with 10 feet on any one side.
R-4 splits by building type: one-, two- and three-family homes there get a 35-foot front, a 40-foot combined side yard (20 feet minimum on either side) and a 50-foot rear, while multi-family buildings in R-4 are held to a flatter 20-foot front, 10-foot side and 20-foot rear. Section 27-17 adjusts those numbers case by case. Where a side wall is not parallel to the lot line, the side yard may vary as long as its average width still meets the minimum and no point is narrower than half that minimum.
A corner lot's side-street setback generally runs at least half the front-yard depth required on the adjoining lot that fronts that side street. A vacant lot squeezed between two built-up lots may shrink its front yard to match the shallower of its two neighbors, but never below 10 feet. Certain features may still reach into the required yard: cornices, canopies and eaves up to 2 inches per foot of side-yard width, capped at 3 feet total; fire escapes up to 4 feet 6 inches; bay windows, balconies, fireplaces, open stairways and chimneys up to 3 feet, so long as they do not cover more than a third of that wall's length; and patios anywhere in a side or rear yard as long as they stay at least 3 feet from the property line.
Violations & Fines
Erecting or enlarging a building inside the required yard, or encroaching on required open space, violates § 27-15, which bars reducing any required yard, lot area or open space below the chapter's minimum even where it is already substandard. The inspector of buildings enforces the setback under § 27-51 by withholding the building permit or certificate of occupancy until the structure conforms.
Frequently Asked Questions
What's the minimum front yard setback for a house in Brockton?
Can my side yard be smaller than the table says if my lot is oddly shaped?
Do bay windows or a fire escape have to stay out of my required yard?
Sources & Official References
Other rules in Brockton
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