Note: The 2018 Connecticut State Building Code is effective as of October 1, 2018; for a list of the model codes and state amendments thereto please see the following link: 2018-CT-State-Building-Code

Note: For homeowners in designated flood zones, you may be able to reduce your insurance premiums by installing engineered flood vents; please see the following for more information: Flood Risk Evaluator

As of Jan. 29, 2019 we will be accepting online trade permit applications; please see the following link for instructions:

 Online Trade Permit Application Requirements

Click the link below to submit your online trade permit application; if a BUILDING PERMIT has been issued for your project, DO NOT use the online service.

 Online Trade Permit Application

You can now follow us on Instagram @ darienbuildingdepartment

For information about C-Pace click HERE.

Building Department

Inspectors are in the office Monday through Friday from 8:30 a.m. - 10:00 a.m., 1:00 p.m - 2:00 p.m., and 4:00 p.m. - 4:30 p.m. to answer questions and take calls

Inspections are Monday through Friday from 10:00 a.m. - 12:00 p.m. and 2:00 p.m. - 4:00 p.m.

Request inspections or information by e-mail to Lisa Mason. Please include:

  • Owner’s name & address
  • Type of Inspection
  • Your name & phone number
  • Permit number

For a list of required inspections for new construction and additions please visit the following link: Town of Darien Building Department Required Inspections; moreover, please see below for a comprehensive list of work that requires a building permit and inspection.

Information available from the Building Department:

  • Surveys and plot plans
  • Permits issued by address
  • Certificates of Occupancy for permits
  • Certificates of Compliance for permits
  • Construction plans for permits issued after 1960; if you are the homeowner
  • A list of current construction

Work requiring a building permit:

  • Building a house
  • Adding a garage
  • Putting on a deck or portico
  • Remodeling a bathroom
  • Finishing part of a basement or attic
  • Installing new roofing or new siding comprising more than 25% of the total roofing or siding area in a calendar year
  • Installing a generator
  • Any natural gas or propane work
  • Installing an oil tank
  • Renovating a kitchen
  • Installing a pool or spa, in-ground or above
  • Erecting a shed
  • Erecting a large tent
  • Demolishing a structure
  • Enclosing a porch
  • Installing a gas or wood burning stove or fireplace
  • Changing the size/location of windows, window replacements or adding a bay window
  • Doing interior alterations
  • Installing lawn sprinkler systems

A Building Permit must be activated within 6 months or the permit shall become null and void. The applicant may request, in writing, a ninety (90) day extension of the permit.

To obtain a Building Permit you will need:

  1. Two (2) completed building applications.
  2. One (1) completed zoning application.
  3. One (1) completed worker’s compensation affidavit; affidavit must also be notarized.
  4. Three (3) sets of plans and three (3) surveys (where required); four (4) set of plans for commercial projects and multi-family projects.
  5. Health Department clearance where required.
  6. A check made out to the "Town of Darien" to cover zoning fees; this fee depends upon the total amount of work proposed; see below for breakdown of fees.
  7. If your building was constructed before 1980, it may contain asbestos and or lead. The building department recommends calling the State of Connecticut Health Department at 860.509.8000 for information on how to identify and handle asbestos and or lead as it relates to your building project.

Everything is dropped off as a package to the Planning and Zoning Department. It will be forwarded to the Building Department for review and you will be contacted when it is ready to be picked up. For more information on the permit application process please see the following link: Zoning and Building Permit Applications

Building Permit fees are as follows:

  1. A permit fee of $10.00 for every $1,000.00 valuation of work or fraction thereof shall be assessed (there shall be a $10.00 fee minimum); additionally, a state-mandated education fee of $0.26 per $1,000 valuation of work shall be assessed.
  2. The above-stated fees cover all mechanical, electrical and plumbing work included in the valuation of work submitted along with the building permit application; individual trade permits, however, must still be obtained separately from the building permit.
  3. Valuation of work includes the entire cost of construction, alteration or moving of the building or structure including value of all materials and labor used, whether or not donated or furnished by the owner. Does not include value of land, sanitary disposal system, well, driveway or site work.
  4. Carnivals, fairs, exhibitions or similar activity - $10.00
  5. Temporary electric service for construction - $30.00
  6. Service change or revamp - $60.00
  7. Oil tank or Propane installation - $20.00
  8. There shall be no refund of any fee, or part thereof, after a permit has been issued.
  9. State-mandated education fee of .26 per $1,000 of construction value shall be assessed to all building permits.

Darien uses the State Building Code:


The Office of the State Building Inspector announces adoption of the 2018 State Building Code with an effective date of October 1, 2018.

The documents that comprise the 2018 State Building Code are as follows:

  • 2015 International Building Code
  • 2009 ICC/ANSI A117.1 Accessible and Usable Buildings and Facilities
  • 2015 International Existing Building Code
  • 2015 International Plumbing Code
  • 2015 International Mechanical Code
  • 2015 International Energy Conservation Code
  • 2017 NFPA 70, National Electrical Code, of the National Fire Protection Association Inc.
  • 2015 International Residential Code

The International Code Council has agreed to publish Connecticut Specific Editions of the 2015 International Building and Residential Codes that incorporate the language of the Connecticut Supplement into the base document. This eliminates the need for concurrent use of the Connecticut Supplement for these two codes. 

Available From:          
International Code Council, Inc.
4051 West Flossmoor Road
Country Club Hills, IL 60478-5795
Telephone:    (888) 422-7233  

The following organizations also sell code books to members and non-members:

American Institute of Architects,               
Connecticut Chapter       
370 James Street, Suite 402        
New Haven, CT 06513
Telephone:  (203) 865-2195


Additional Information:

Contact Information

Darien Town Hall, Renshaw Road, Building Department, Office 212
Phone: (203) 656-7347
Fax: (203) 656-7485

Open Monday - Friday
8:30 a.m. - 4:30 p.m.
Closed Holidays

Peter E. Solheim
Head Building Official

Michael Vitti
Assistant Building Official

Gary Willson
Assistant Building Official
Electrical Inspector

Lisa Mason
Office Administrator

Inna Ginzburg              Secretary