Do I need a permit for a shed in Walpole, Massachusetts?
Tool sheds are allowed by right as accessory buildings in every Walpole zoning district. A detached shed 15 feet tall or less needs only 10 feet from the rear lot line, but on most lots it must meet the district's full side setback (25 ft Rural, 20 ft Residence A, 15 ft Residence B, 10 ft General Residence); the reduced 6-foot side setback applies only if the shed sits at least 100 feet back from the front lot line. Sheds over 22 x 24 feet or 15 feet high must meet the full setbacks for a main building.
| Allowed use | Tool shed, playhouse, greenhouse etc. allowed by right (A) in all districts [1] |
| Rear setback (shed 15 ft or less) | 10 feet [2] |
| Side setback, shed less than 100 ft from front lot line | District side setback: Rural 25 ft, RA 20 ft, RB 15 ft, GR 10 ft [8] |
| Side setback (shed 15 ft or less, set back 100+ ft from front) | 6 feet [3] |
| Size/height for reduced setbacks | Up to 22 ft x 24 ft and 15 ft high [4] |
| Max accessory structure size | 40% of the main building's gross floor area [5] |
| Sheds in the floodplain overlay | Board of Appeals special permit [6] |
Allowed by right
The zoning use table lists accessory buildings such as a greenhouse, stable, tool shed, playhouse or similar building for domestic storage as allowed (A) in every district [1].
Setbacks
Footnote 3 to the dimensional table gives detached accessory buildings 15 feet tall or less a reduced rear setback of 10 feet, wherever they sit on the lot [2]. The side setback is stricter. Footnote 4 allows a 6-foot side setback only for a small accessory building "having a front yard setback of at least one-hundred (100) feet" [3]. On a typical lot, where the shed would be less than 100 feet from the street, the plain reading is that the district's ordinary side setback applies: 25 feet in Rural [7], 20 feet in Residence A [8], 15 feet in Residence B [9] and 10 feet in General Residence [10]. The front setback is 30 feet in all four districts, and Section 6-C.8 keeps structures out of required setbacks except for listed items such as fences, walls and pools.
An unclear sentence
Footnote 4's last sentence says a detached accessory building taller than 15 feet must meet the "front yard setback", even though the footnote is about side lines [3]. It probably means the side setback, but the text doesn't say so. Taller or larger sheds have to meet the district's normal dimensional rules either way (see below), so ask the Building Department how it applies Footnote 4 before you pick a spot.
Size and height
The definitions treat an accessory building as one no larger than 22 by 24 feet and no taller than 15 feet; anything bigger must meet the district's full dimensional requirements [4]. Accessory structures may not exceed 40% of the main building's gross floor area or contain sleeping or kitchen facilities [5].
Permits and special areas
The zoning bylaw doesn't set a building-permit size threshold for sheds; the state building code rule shown on this page applies. In the Flood Plain Protection Overlay District, sheds need a Board of Appeals special permit [6], and sheds near wetlands may need Conservation Commission review.
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Next steps
- Measure the planned spot: at least 10 feet from the rear line, and the district side setback (25/20/15/10 ft in R/RA/RB/GR) unless the shed is 100+ feet back from the front lot line, in which case 6 feet.
- Keep the shed 15 feet tall or less and within 22 x 24 feet to use the reduced setbacks.
- Check whether the lot is in the floodplain overlay or within 100 feet of a wetland.
- Ask the Building Department (508-660-6348) whether your shed needs a building permit and bring a plot plan showing the distances to lot lines.
Common questions
- Do I need a permit for a shed in Walpole, Massachusetts?
- It depends. Sheds are allowed by right in every zoning district, and the zoning bylaw sets no building-permit size threshold; the state building code rule applies. Ask the Building Department whether your shed needs a permit and bring a plot plan.
- How close to the property line can a shed be in Walpole, Massachusetts?
- A shed 15 feet tall or less needs 10 feet from the rear line. On most lots it must meet the district side setback (25 ft Rural, 20 ft Residence A, 15 ft Residence B, 10 ft General Residence); 6 feet applies only if it sits 100+ feet back from the front lot line.
- Is the shed side setback rule clear in Walpole, Massachusetts?
- Not entirely. Footnote 4's last sentence says a detached accessory building over 15 feet must meet the "front yard setback," though the footnote concerns side lines; it probably means side setback, but the text doesn't say. Ask the Building Department how it applies Footnote 4 before picking a spot.
- How big can a shed be in Walpole, Massachusetts?
- To use the reduced setbacks, a shed must be within 22 x 24 feet and 15 feet high; larger sheds must meet the full setbacks for a main building. Accessory structures can't exceed 40% of the main building's gross floor area or contain sleeping or kitchen facilities.
- Can I put a shed in a floodplain in Walpole, Massachusetts?
- Only with approval. In the Flood Plain Protection Overlay District, sheds need a Board of Appeals special permit, and sheds near wetlands may need Conservation Commission review.
Massachusetts building code rules for sheds
The Massachusetts State Building Code (780 CMR, 10th edition) sets when a shed needs a building permit. Your town's zoning sets where it can go.
- No building permit needed for a one-story detached accessory structure used as a tool or storage shed, playhouse or similar, if the floor area is 200 sq ft or less (Residential Code R105.2).
- Bigger sheds, or any with more than one story, need a building permit from your local building department.
- Also exempt from a building permit: detached decks of 200 sq ft or less that are no more than 30 inches above grade, and greenhouses covered only in plastic film.
- The exemption covers only the building permit. Electrical, plumbing or gas work in the shed still needs its own permits, and the shed still has to meet local zoning (setbacks, lot coverage, height). Many towns set accessory-structure setbacks even for small sheds.
- Wetlands: putting a shed in a wetland resource area or within 100 feet of a wetland (or 200 feet of a river) may require Conservation Commission approval first, whatever its size.
The 10th edition took effect October 11, 2024 and has been the only code in force since July 1, 2025.
What the bylaw says
- Table 5-B.1, Use Table, 3.r, Zoning Bylaws (Revised Through October 2025), p. 21
r. Accessory where incidental to a permitted use, including the following: greenhouse, stable, tool shed, playhouse, tennis court, boathouse or other A A A A A A A A A A 6 similar building or structure for domestic storage use.
- Explanatory Notes to Table 6-B.1, Note 3, Zoning Bylaws (Revised Through October 2025), p. 46
Except that any detached accessory building or structure fifteen (15) feet in height or under shall have a minimum setback of ten (10) feet from the rear lot line. Any detached accessory building or structure that exceeds fifteen (15) feet in height shall conform to the otherwise applicable rear yard setback set forth in the Table 6-B.1.
- Explanatory Notes to Table 6-B.1, Note 4, Zoning Bylaws (Revised Through October 2025), p. 46
Except that any detached accessory building or structure fifteen (15) feet in height or under having a front yard setback of at least one-hundred (100) feet shall have a minimum setback of six (6) feet from the side lines of its lot.
- Sec. 14, Definitions (An Accessory Building or Structure), Zoning Bylaws (Revised Through October 2025), p. 104
AN ACCESSORY BUILDING OR STRUCTURE – shall not exceed twenty-two (22) feet by twenty-four (24) feet in dimension or be more than fifteen (15) feet in height. Accessory buildings or structures that exceed these dimensions shall conform to the dimensional requirements in the zoning district where located.
- Sec. 14, Definitions (Structure, Accessory), Zoning Bylaws (Revised Through October 2025), p. 118
Accessory structures shall not exceed forty percent (40%) of the gross floor area of the principal structure(s) and shall not contain sleeping or kitchen facilities.
- Sec. 11.5.A(1), Flood Plain Protection Overlay District, Zoning Bylaws (Revised Through October 2025), p. 83
The Town of Walpole requires a Special Permit issued by the Board of Appeals for all proposed construction or other development in the floodplain protection overlay district, including new construction or changes to existing buildings, placement of manufactured homes, placement of agricultural facilities, fences, sheds, storage facilities or drilling, mining, paving and any other development that might increase flooding or adversely impact flood risks to other properties.
- Table 6-B.1, Table of Dimensional Regulations (Rural), Zoning Bylaws (Revised Through October 2025), p. 45
Rural 30 25 30
- Table 6-B.1, Table of Dimensional Regulations (Residence A), Zoning Bylaws (Revised Through October 2025), p. 45
Residence A 30 20 30
- Table 6-B.1, Table of Dimensional Regulations (Residence B), Zoning Bylaws (Revised Through October 2025), p. 45
Residence B 30 15 30
- Table 6-B.1, Table of Dimensional Regulations (General Residence), Zoning Bylaws (Revised Through October 2025), p. 45
General Residence 30 10 30