Development Services

Appointed Official
Clarence Daugherty​

Development Services Division Manager
Misty Brown, RS

Collin County Engineering Department
4690 Community Ave., Suite 200
McKinney, TX 75071
972-548-5585 (McKinney)
972-548-5555 (Fax)

Hours: 7:30 a.m. - 4:00 p.m., Monday - Friday

SPECIAL NOTICE: The Development Services Offices and Fire Marshal’s Office are open for business and we are here to serve you. In an effort to reduce the spread of COVID-19, we will be making appointments so that we can better serve you while continuing to ensure the health of all involved. Beginning on Monday, March 23, 2020, anyone wishing to visit the Fire Marshal’s Office or Development Services will need to call ‪(469) 907-4108 and leave a message. During regular business hours (M-F 7:30 a.m.- 4 p.m.) your call will be promptly returned to schedule your appointment. 

Both offices will also be accepting electronic/emailed application packets at this time for your convenience.  Email your completed Fire Marshal application packets to: and email your completed Development Services application packets to:

Our Mission

Dedicated to protecting and preserving the health and safety of our citizens and our environment.

Links & Resources

OSSF Permits and OSSF Related Information
Residential Development Permits and Related Information
Commercial/Non-Residential Construction Permits and Related Information
Culvert Permits
Pool Construction Permits
Fireworks Stand Permits
Food Service / Health Permits and Related Information
Permit Fees
Code Enforcement and Related Information
Metro (Tornado) Safe Room Rebate Program

On-Site Sewage Facilities Rules and Regulations (CO# 2008-187-03-11)
Subdivision Plat OSSF Review Application