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§ 02
When a permit is required
Permit triggers and exempt work for Dennis
A building permit is required for all construction within the Town of Dennis.
One-story detached accessory structures (tool sheds, playhouses) with floor area 120 sq. ft. or less
Fences not exceeding 7 feet in height
Retaining walls not over 4 feet high (unless supporting surcharge or impounding liquids)
Water tanks on grade, 5,000 gallons or less, height-to-diameter ratio 2:1 or less
Sidewalks and driveways not more than 30 inches above adjacent grade
Painting, papering, tiling, carpeting, cabinets, countertops, and similar finish work
Prefabricated swimming pools (1-2 family, less than 24 inches deep, less than 5,000 gallons, above ground)
Swings and playground equipment (1-2 family dwellings)
Window awnings (residential/utility, not more than 54 inches projection)
Other statewide exemptions per 780 CMR 105.2
- Exempt One-story detached accessory structures (tool sheds, playhouses) with floor area 120 sq. ft. or less
- Exempt Fences not exceeding 7 feet in height
- Exempt Retaining walls not over 4 feet high (unless supporting surcharge or impounding liquids)
- Exempt Water tanks on grade, 5,000 gallons or less, height-to-diameter ratio 2:1 or less
- Exempt Sidewalks and driveways not more than 30 inches above adjacent grade
- Exempt Painting, papering, tiling, carpeting, cabinets, countertops, and similar finish work
- Exempt Prefabricated swimming pools (1-2 family, less than 24 inches deep, less than 5,000 gallons, above ground)
- Exempt Swings and playground equipment (1-2 family dwellings)
- Exempt Window awnings (residential/utility, not more than 54 inches projection)
- Exempt Other statewide exemptions per 780 CMR 105.2
Note: If work does not commence within 180 days of issuance, permit may expire. Contact 508-760-6157 for guidance on borderline projects.
Required documents
- Completed building permit application
- Construction Checklist for Single and Two Family Dwellings
- Plot Plan
- Workers' Compensation Form
- Owner's Authorization Form (if applicable)
- Homeowner's Exemption Affidavit (if owner-acting-as-contractor)
- Stormwater Permit Notes
- Initial and Final Construction Control Documents (for structures over 35,000 cu. ft.)
- Building code
- Massachusetts State Building Code 780 CMR, 10th Edition (effective October 11, 2024; sole applicable code as of July 1, 2025)
- Permit validity
- Work must commence within 6 months of issuance. Permits expire if work is abandoned for 6 months.
- Owner-builder
- Homeowner Exemption available for owner-occupants of 1-2 family primary residences.
- Contractor requirements
- CSL required for structural work and structures over 35,000 cu. ft.; HIC required for residential remodeling.
Source: Building Department ↗
§ 03
Application process
Typical processing: Varies by project complexity; 10th Edition of 780 CMR applies to applications received on or after January 1, 2025
- 01 Register or log in to the OpenGov portal at https://dennisma.portal.opengov.com/
- 02 Select permit type: 1/2-family residential, commercial, express, or trade permits.
- 03 Attach required documents: Construction Checklist, Plot Plan, Workers' Compensation Form, Owner's Authorization (if applicable), Homeowner's Exemption Affidavit (if applicable), Stormwater Permit Notes.
- 04 For commercial structures over 35,000 cu. ft., provide Initial and Final Construction Control Documents (10th Edition).
- 05 For properties north of Route 6, obtain Old King's Highway District Committee approval before submitting.
- 06 For flood zones or wetland-adjacent properties, obtain Conservation Commission approval.
- 07 Upload documents and pay fees through the portal.
- 08 Interior inspections require an adult (18+) present on-site; exterior inspections do not.
Typical processing time: Varies by project complexity; 10th Edition of 780 CMR applies to applications received on or after January 1, 2025
Source: Building Department ↗
§ 04
Fee schedule
Effective FY2025 (document not machine-readable during research)
Fee type
Amount
01
Minimum permit fee
Contact Building Department for current rate
02
Permit fee formula
Estimated $8-$12 per $1,000 of construction value based on regional comparisons (confirm with department)
Online payment through OpenGov portal accepted
Fees change periodically. Confirm at the official fee schedule ↗ (effective FY2025 (document not machine-readable during research)) before budgeting.
§ 05
Required inspections
Scheduling and sequence
How to schedule
- OpenGov customer portal (online)
- Scheduling deadline
- Contact department for inspection scheduling
- Inspection hours
- Building inspections: Monday-Friday, 9:00 AM - 4:00 PM
Typical sequence: As-built survey required prior to Certificate of Occupancy for all new buildings.
Source: Building Department ↗
§ 06
Frequently asked
Common questions about Dennis permits
01 Do I need a building permit in Dennis, MA? ▸
A building permit is required for all construction within the Town of Dennis.
02 How much does a building permit cost in Dennis, MA? ▸
Building permit fees in Dennis, MA are set by the local building department and vary by project type and valuation. The minimum permit fee is Contact Building Department for current rate. Fees are calculated as: Estimated $8-$12 per $1,000 of construction value based on regional comparisons (confirm with department).
03 How do I apply for a building permit in Dennis, MA? ▸
To apply for a building permit in Dennis, MA, follow these steps: 1. Register or log in to the OpenGov portal at https://dennisma.portal.opengov.com/ 2. Select permit type: 1/2-family residential, commercial, express, or trade permits. 3. Attach required documents: Construction Checklist, Plot Plan, Workers' Compensation Form, Owner's Authorization (if applicable), Homeowner's Exemption Affidavit (if applicable), Stormwater Permit Notes. 4. For commercial structures over 35,000 cu. ft., provide Initial and Final Construction Control Documents (10th Edition). 5. For properties north of Route 6, obtain Old King's Highway District Committee approval before submitting. 6. For flood zones or wetland-adjacent properties, obtain Conservation Commission approval. 7. Upload documents and pay fees through the portal. 8. Interior inspections require an adult (18+) present on-site; exterior inspections do not.
04 How long does it take to get a building permit in Dennis, MA? ▸
Building permit processing times in Dennis, MA typically run Varies by project complexity; 10th Edition of 780 CMR applies to applications received on or after January 1, 2025. Timelines can vary based on project complexity and current department workload.
05 What work is exempt from building permits in Dennis, MA? ▸
Not all construction work requires a permit in Dennis, MA. The following work is generally exempt: One-story detached accessory structures (tool sheds, playhouses) with floor area 120 sq. ft. or less; Fences not exceeding 7 feet in height; Retaining walls not over 4 feet high (unless supporting surcharge or impounding liquids); Water tanks on grade, 5,000 gallons or less, height-to-diameter ratio 2:1 or less; Sidewalks and driveways not more than 30 inches above adjacent grade; Painting, papering, tiling, carpeting, cabinets, countertops, and similar finish work; Prefabricated swimming pools (1-2 family, less than 24 inches deep, less than 5,000 gallons, above ground); Swings and playground equipment (1-2 family dwellings); Window awnings (residential/utility, not more than 54 inches projection); Other statewide exemptions per 780 CMR 105.2. Note: If work does not commence within 180 days of issuance, permit may expire. Contact 508-760-6157 for guidance on borderline projects. When in doubt, confirm with the local building department before starting work.
06 How do I schedule a building inspection in Dennis, MA? ▸
Once your permit is issued and work reaches an inspection milestone, you can schedule a building inspection in Dennis, MA via: OpenGov customer portal. Contact department for inspection scheduling.
last verified April 2026
source Building Department ↗
entry id permits/massachusetts/barnstable/dennis
Educational reference. Permit rules and fees change — confirm current requirements directly with Building Department before applying. Jaspector is not legal advice.