Building permits, zoning and septic rules in DeSoto, Texas

At a glance

Building permit

Required from the City of DeSoto for building, alteration, repair, moving or demolition¹

Zoning

Yes, the City's own zoning ordinance²

Lot size (SF-10)

Lots of not less than 10,000 square feet²

Minimum dwelling (SF-10)

2,000 square feet⁴

RV living (SF-10)

Prohibited as an on-site dwelling⁵

Septic inside city

Not confirmed; ask the city or Dallas County Health and Human Services³

Unincorporated land

County development permit; no county zoning⁶⁷

Who to call

Contact details are copied from each office’s official page and were checked against it on October 14, 2026.

Do you need a building permit in DeSoto, Texas?

Yes. The City of DeSoto requires building permits when an owner or agent intends to construct, alter, repair, move or demolish a building, or to install or replace electrical, gas, mechanical or plumbing systems¹. Common homeowner projects such as fences, carports, additions and pools need permits and inspections too¹.

A building permit cannot be issued for a property that has not been platted or is not a legal lot of record¹. Applications go through the city's Customer Self-Service Portal¹. We could not confirm DeSoto's permit fees or an owner-builder exemption inside the city; call Building Inspections before you plan on either.

Who issues building permits in DeSoto, and how do you reach them?

The City of DeSoto's Building Inspections Department, part of Development Services, issues building permits and registers contractors; call 972-230-9610¹. Development Services describes itself as a one-stop-shop for engineering, planning and zoning, and building inspections, and answers at 972-230-9609⁸.

Dallas County's Department of Unincorporated Area Services issues permits only for properties in the unincorporated areas of Dallas County, so it is the wrong counter for an address inside DeSoto⁹.

Does DeSoto have zoning, and what does it mean for RVs and lot size?

Yes. DeSoto adopts its own zoning ordinance, and the city distinguishes zoning from building codes: zoning regulates open space, setbacks, heights and how land can be used²¹. Rules differ by district; the single-family district below is the example².

In that district, lots must be not less than 10,000 square feet². The minimum front yard is 25 feet and the minimum side yard is 7 feet, or 15 feet on a corner lot next to a street¹⁰. Lot coverage may not exceed 50 percent¹¹, main buildings may be 2.5 stories¹², and a dwelling must be at least 2,000 square feet⁴. RVs, travel trailers and motor homes may not be used for on-site dwelling purposes in that district⁵. Tiny homes, accessory dwellings and manufactured homes were not confirmed; ask Planning & Zoning.

How do septic permits work inside DeSoto?

We could not confirm who issues septic permits inside DeSoto city limits. Texas requires a permit and approved plan to construct, alter, repair, extend or operate an on-site sewage facility¹³, and most local governments act as TCEQ-authorized agents¹⁴. Dallas County Health and Human Services directs septic questions for land outside a city to (214) 819-2115¹⁵.

Most lots inside a city connect to municipal sewer, but we could not confirm that for your address; ask Building Inspections and Dallas County Health and Human Services which applies. Dallas County's soils rate poorly for conventional drain fields, so expect a site evaluation if septic is allowed¹⁶.

Building a home in DeSoto: the steps, in order

1. Confirm the property is a platted legal lot of record, because no building permit can be issued otherwise¹.
2. Ask Planning & Zoning at 972-230-9609 which zoning district applies and what it requires⁸.
3. Apply for your building permit through the Customer Self-Service Portal¹.
4. Settle water and sewer or septic with the city and Dallas County Health and Human Services¹⁵.
5. Schedule inspections with Building Inspections at 972-230-9610¹.

What stays with Dallas County, and what to check before you buy?

Land outside DeSoto and every other city is different: Dallas County has no authority to enact zoning, and it requires development permits in the unincorporated area⁷⁶. See the Dallas County page for those rules.

County-level context: the effective property tax rate is 1.7 percent¹⁷ and the typical home value is $312,298¹⁸. A development inside a floodplain needs a Dallas County floodplain permit if unincorporated; inside a city, contact that city's Floodplain Administrator¹⁹.

Watch-outs

• The DeSoto zoning facts here describe one single-family district; other districts have different lot sizes, setbacks and RV rules, so confirm the parcel's district with Planning & Zoning⁸.
• The zoning ordinance we read is dated August 1997, amended November 2014, so later amendments may change the numbers².
• A state electrician-license exemption for owners does not waive local permits or inspections²⁰.
• A driveway onto a state highway needs a TxDOT permit (Form 1058)²¹.

Sources

1. City of DeSoto Building Inspections (desototexas.gov)
2. SF-10 Single Family Residential District, City of DeSoto Zoning Ordinance (Section 19) (DeSoto), quoted and re-checked
3. Zoning and Other Related Regulations, quoted and re-checked
4. SF-10 Single Family Residential District, City of DeSoto Zoning Ordinance (Section 19) (DeSoto), quoted and re-checked
5. SF-10 Single Family Residential District, City of DeSoto Zoning Ordinance (Section 19) (DeSoto), quoted and re-checked
6. Department of Unincorporated Area Services | Obtaining a Development Permit, quoted and re-checked
7. Planning and Development | Zoning, quoted and re-checked
8. City of DeSoto Development Services (Planning & Zoning) (desototexas.gov)
9. Development Permit, quoted and re-checked
10. SF-10 Single Family Residential District, City of DeSoto Zoning Ordinance (Section 19) (DeSoto), quoted and re-checked
11. SF-10 Single Family Residential District, City of DeSoto Zoning Ordinance (Section 19) (DeSoto), quoted and re-checked
12. SF-10 Single Family Residential District, City of DeSoto Zoning Ordinance (Section 19) (DeSoto), quoted and re-checked
13. Getting a Permit for an OSSF - Such as a Septic System (Texas statewide rule), quoted and re-checked
14. Getting a Permit for an OSSF - Such as a Septic System (Texas statewide rule), quoted and re-checked
15. Dallas County Health and Human Services (dallascounty.org)
16. Share of soils USDA rates "not limited" for a conventional septic drain field (SSURGO). A strict rating: the median county is about 6% and a tenth of counties are 0%, so a low figure means most lots need a site evaluation or an engineered system, not that septic is impossible. Cite it only with that caveat: Bolthole Index county data
17. Effective property tax rate: Bolthole Index county data
18. Typical home value (Zillow): Bolthole Index county data
19. Floodplain Administration, quoted and re-checked
20. Exemptions to Electrician Licensing (Texas statewide rule), quoted and re-checked
21. Section 4: Driveway Permits, Design, and Materials (Texas statewide rule), quoted and re-checked

Written October 14, 2026 from the rules quoted below, each taken from an official source and re-checked by an independent reviewer. This is research, not legal advice: rules change, so confirm with the office before you buy or build.