Building permits, zoning and land rules in Lewisville, Texas

At a glance

Building permits

Required for new construction, remodeling and additions¹

Zoning

City zoning and district-specific development standards²

Residential building code

2021 International Residential Code with local amendments⁴

RV living

Prohibited in stored RVs in single-family attached or detached and two-family zoning districts⁵

Minimum dwelling size

R-9: 1,700 square feet; AO: no minimum dwelling-unit size⁶⁷

Septic permits

Generally required under Texas law; city-address authority unconfirmed³

Driveway improvements

A permit is required for driveway and parking-surface improvements⁸

Who to call

Contact details are copied from each office’s official page and were checked against it on October 11, 2026.

Do you need a building permit in Lewisville, TX?

Lewisville requires building permits for new construction, remodeling, changes and additions to structures, including fences, pools, patio covers and plumbing or electrical work.¹ Lewisville Building Services coordinates plan review, building permitting and inspections under city ordinances and adopted codes.¹ Residential construction follows the 2021 International Residential Code with local amendments.⁴ Before arranging work, ask Building Services which application and drawings your project needs; ask specifically about owner-built work because we could not confirm a Lewisville owner-builder exemption.

Who handles Lewisville building permits and online applications?

Contact Lewisville Building Services at 972.219.3470 or visit 151 W. Church Street Lewisville, TX 75057 for building-permit questions.¹ Lewisville uses MGO Connect for building-permit applications and inspection requests; applicants create an account and submit an application through the link on the city’s Building Permits page.⁹ After approval, Lewisville invoices applicable fees, takes payment through MGO Connect and makes the building permit or approval certificate available to download after payment.⁹ Ask Building Services for the current fee estimate before committing to a construction budget.

Does Lewisville have zoning, lot-size limits and setbacks?

Lewisville development must meet the applicable zoning district and Unified Development Code standards.² Ask the Lewisville Planning Department at 972.219.3455 to identify the parcel’s district before choosing a house plan.¹⁰ In R-9, the minimum lot area is 9,000 square feet and the minimum dwelling-unit size is 1,700 square feet.¹¹⁶ In AO Agriculture-Open Space, the minimum lot area is 1 acre, with 100-foot front, side and rear yards.¹²¹³ AO limits principal and accessory building coverage to 10%, while R-9 allows 35%; these are district rules, not citywide dimensions.¹⁴¹⁵

Can you live in an RV or tiny home in Lewisville?

Lewisville prohibits housekeeping, living or sleeping use of stored recreational vehicles on lots in single-family attached or detached and two-family zoning districts; that answer does not establish the rules for licensed camping areas or every other district.⁵ For a tiny home, the district matters: R-9 requires a dwelling of at least 1,700 square feet, while AO lists no minimum dwelling-unit size.⁶⁷ AO development still has zoning standards and must meet the city’s adopted residential code.²⁴ We could not confirm a citywide tiny-home occupancy rule; ask Planning about the proposed dwelling and Building Services about construction approval before buying it.

How do septic permits work inside Lewisville?

Texas generally requires a permit and approved plan to construct, alter, repair, extend or operate an on-site sewage facility.³ We could not confirm who issues OSSF permits inside Lewisville; ask city Building Services to identify the responsible authority and confirm sewer availability for the parcel. Denton County Environmental Health’s published OSSF jurisdiction covers unincorporated Denton County, so its county role alone does not establish jurisdiction inside Lewisville.¹⁶ Texas allows a conditional 10-acre exemption only with all required site-evaluation, single-dwelling, on-site disposal and pollution safeguards, including keeping every OSSF component at least 100 feet from property lines; ask the permitting authority whether stricter local requirements apply.³

What steps should you take before building a home in Lewisville?

Start by asking Lewisville Planning to confirm the parcel’s zoning district, then match the proposed dwelling and site layout to that district’s standards.² Ask Building Services to confirm water, sewer or septic approvals and the construction documents needed before submitting a building-permit application. Lewisville accepts building-permit applications through MGO Connect; if plans need revisions, the city sends mark-ups there and applicants upload revised plans to the project file.⁹ Obtain the required permit for driveway and parking-surface improvements as well.⁸ For land outside city limits, use the Denton County guide and confirm county jurisdiction; Environmental Health’s published septic responsibilities concern unincorporated land.¹⁶

Watch-outs

• An AO lot’s lack of a minimum dwelling-unit size does not settle tiny-home approval: Lewisville zoning standards and the adopted residential code still apply.⁷²⁴
• Lewisville subdivision proposals, including manufactured-home parks and subdivisions, must meet the cited floodplain-development permit requirements; ask the city about your proposal’s floodplain review.¹⁷
• We could not confirm Lewisville’s private-well, mandatory sewer-connection or owner-builder exemption rules; ask Building Services to identify the approvals needed for the address.¹

Sources

1. Lewisville Building Services (cityoflewisville.com)
2. Unified Development Code § VI.5.4, R-9 Single-Family Residential (Lewisville), quoted and re-checked
3. Getting a Permit for an OSSF - Such as a Septic System (Texas statewide rule), quoted and re-checked
4. Code of Ordinances § 4-31, Residential code—Adopted (Lewisville), quoted and re-checked
5. Code of Ordinances § 15-134, Special vehicles and recreational vehicles (Lewisville), quoted and re-checked
6. Unified Development Code § VI.5.4, R-9 Single-Family Residential (Lewisville), quoted and re-checked
7. Unified Development Code § VI.5.1, AO Agriculture-Open Space (Lewisville), quoted and re-checked
8. Code of Ordinances § 15-134, Driveway and parking-surface improvements (Lewisville), quoted and re-checked
9. Lewisville Building Services — online applications (cityoflewisville.com)
10. Lewisville Planning Department (cityoflewisville.com)
11. Unified Development Code § VI.5.4, R-9 Single-Family Residential (Lewisville), quoted and re-checked
12. Unified Development Code § VI.5.1, AO Agriculture-Open Space (Lewisville), quoted and re-checked
13. Unified Development Code § VI.5.1, AO Agriculture-Open Space (Lewisville), quoted and re-checked
14. Unified Development Code § VI.5.1, AO Agriculture-Open Space (Lewisville), quoted and re-checked
15. Unified Development Code § VI.5.4, R-9 Single-Family Residential (Lewisville), quoted and re-checked
16. Denton County Public Health — Environmental Health Division (dentoncounty.gov)
17. Code of Ordinances § 5.5-18, Subdivision proposals (Lewisville), quoted and re-checked

Written October 11, 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.