Denton County, TX Business License Guide: Cities, DBA, and County Rules

The Denton County business license, tax, and permit layer

Does Denton County issue a general business license?

Denton County should not be treated as a general business-license office for every business in the county. The county’s current business-related pages focus on particular filings and permits rather than one universal county operating license.

County involvement is still important when the site is outside municipal limits or when a countywide filing function applies. Examples include certain assumed-name records, development work in unincorporated territory, county Fire Marshal review, septic/OSSF matters, floodplain or subdivision issues, and access from a county-maintained road. These are separate approvals; one does not replace the others.

Development permits in unincorporated Denton County

Denton County Development Services states that development in unincorporated Denton County requires a Development Permit. Its definition is broad and includes buildings, grading, paving, excavation, drilling, and storage of equipment or materials. That can matter for a contractor yard, warehouse, outdoor storage site, event venue, or home property being changed for business use.

County Development Services also identifies possible culvert, septic, and Fire Marshal layers. Its current page says a revised fee schedule took effect June 2, 2026, so do not rely on an older fee amount. Start with the Denton County Development Services page and its development forms and documents before making physical changes to an unincorporated site.

Fire permits in unincorporated areas

The Denton County Fire Marshal says it inspects commercial businesses, high-hazard operations, and fire protection systems in unincorporated Denton County. Commercial development can require construction or operational fire permits. The county fire code also has a mobile-food-preparation-vehicle permit requirement in unincorporated Denton County, which is separate from the new DSHS mobile food license.

Use the Denton County Fire Code page, Construction and Operational Permits page, and the Fire Marshal forms and documents.

Environmental health and septic

Denton County Public Health Environmental Health administers the county’s on-site sewage facility program in unincorporated areas. A septic or OSSF issue can matter when a business site is built, expanded, or changes use outside public sewer service. This is not a general business license. Use the Environmental Health Division and its current documents when this layer applies.

The city or municipal layer: Denton, Frisco, Lewisville, and other cities

If the site is inside a city or town, that municipality often controls the approvals that determine whether you can actually open at the address.

City of Denton

Denton’s official permits page routes businesses to commercial permits, health and food safety, fire permits, short-term rental registration, contractor registration, signs, and other local approvals. The city says a Certificate of Occupancy (CO) is required for all new businesses and for a change in use, business name, or owner of a single space, tenant, or building.

Start with Denton Permits and Licenses and the Denton Certificate of Occupancy page. Contractors should also check the city’s contractor registration path. Short-term rental operators have a separate STR registration process; that is an activity-specific city registration, not a general business license.

City of Frisco

Frisco crosses county lines, so being on the Denton County side does not move city permitting to the county. Frisco’s commercial process includes certificates of occupancy, signs, commercial building permits, finish-outs, health-related applications, inspections, and contractor registration. Its current commercial permit page uses the city’s electronic permitting workflow.

Use Frisco Plans and Permits, Frisco Commercial Permits, and Frisco contractor registration when those paths fit the project.

City of Lewisville

Lewisville says a CO is required for changes such as ownership, tenant, business name, use, new construction, and certain enlarged or altered buildings. Building Services now uses MGO Connect for building permits, contractor registration, payments, and inspection requests.

Start with the Lewisville Certificate of Occupancy page, Lewisville Building Permits, and the city’s Inspections and Permitting resources.

Other Denton County cities and towns

Denton County includes or overlaps many municipalities, including Flower Mound, The Colony, Little Elm, Carrollton, Highland Village, Roanoke, Corinth, Argyle, Aubrey, Krum, Pilot Point, Sanger, Trophy Club, Lake Dallas, Hickory Creek, Shady Shores, and others. Inside any municipality, use that city or town’s official site for zoning, occupancy, building, fire, sign, food-site, home-business, contractor, and activity-specific rules.

DBA, trade name, and assumed name rules in Denton County

Texas commonly uses the term assumed name. A DBA is a name filing. It is not a business license, does not create an LLC, and does not prove zoning or occupancy approval.

When the Denton County Clerk may matter

Texas Business and Commerce Code Chapter 71 separates certain non-filing owners from state filing entities. An individual, general partnership, or other person covered by the “certain unincorporated persons” rules may need a county assumed-name certificate when regularly doing business under an assumed name. The filing is made in each county where that person maintains business premises, or where the person conducts business if there is no business premises.

This county-clerk route is about the type of legal owner and where the business is carried on; it is not limited to a property that sits outside city limits. By contrast, corporations, LLCs, limited partnerships, LLPs, and other covered filing entities generally use the Secretary of State route. Denton County’s current page reflects the 2019 change that ended county assumed-name filing for those filing entities.

Use the Denton County Assumed Names (DBAs) page, the county’s current forms, and Texas Business and Commerce Code Chapter 71.

When the Texas Secretary of State matters

A Texas filing entity that regularly does business under a name other than its legal name generally files the assumed name with the Secretary of State. Form 503 instructions explain the filing-entity rule and the 2019 elimination of the county filing requirement for covered entities.

As of September 29, 2026, the Secretary of State’s current online business filing system is SOSPortal. Use Texas Secretary of State Business Services and the Form 503 instructions.

Texas state registrations and taxes

Texas does not require one general statewide business license for every business. State-level duties still apply based on structure, taxes, employees, and activity.

Entity filing

If you form an LLC, corporation, limited partnership, nonprofit corporation, or another filing entity, use the Texas Secretary of State. The SOSPortal transition is important because older articles and bookmarks may still point to SOSDirect or SOSUpload.

Texas sales and use tax

The Comptroller says businesses engaged in Texas that sell or lease taxable goods or provide taxable services generally need to check the Texas sales and use tax permit rules. Marketplace-only sellers can have different permit consequences, so use the Comptroller’s specific guidance for your sales model.

Apply or check requirements through the Texas Online Tax Registration Application.

If you hire employees

Do not stop at one tax registration. Check whether you must establish a Texas unemployment tax account with the Texas Workforce Commission, and report new hires and rehires to the Texas Office of the Attorney General within the required reporting period.

Use the TWC Unemployment Tax program page to reach the current employer registration/account route, and use Texas New Hire Reporting for the separate new-hire duty.

Professional and industry licenses

Some trades and professions need a state license before work begins. TDLR regulates many fields, including electricians, air-conditioning and refrigeration contractors, barbering and cosmetology, massage therapy, towing and vehicle storage, mold, and other programs. Other professions are handled by different state boards.

Use TDLR regulated programs and the Texas Business Permit Office as state starting points.

Federal EIN

An EIN is a federal tax ID, not a business license. Businesses that hire employees and many entities need one. Apply free through the IRS EIN page.

Zoning, home occupation, building, fire, health, food, and activity permits

Zoning and home-based businesses

Home-business rules require special care because Texas law now limits what a municipality can require from a qualifying no-impact home-based business. Since June 12, 2025, Texas Local Government Code Section 229.902 says a municipality may not prohibit a qualifying no-impact home-based business or require that business or property owner to obtain a municipal license, permit, or other approval just to operate it.

The protection is not unlimited. The statute defines the no-impact category using occupancy, traffic/parking, street visibility, and noise conditions. Municipalities may still enforce generally applicable fire, building, health, sanitation, traffic, waste, pollution, and noise rules within the law. Private HOA or deed restrictions can also still matter.

If the home business does not fit the no-impact category, check the current city zoning code. If the property is outside city limits, check Denton County development, septic, fire, deed restriction, and special-district issues that actually apply.

Certificate of occupancy and building work

For a storefront, office, salon, gym, clinic, warehouse, restaurant, studio, or other physical location, verify zoning and CO requirements before signing a lease. Remodeling, electrical, plumbing, mechanical work, signs, changes of use, and fire-system work may trigger separate permits.

Food establishments and temporary food

Fixed restaurants, bakeries, caterers, and temporary food operations still need to identify the health authority for the exact site or event. DSHS regulates retail food establishments where a local health agency does not have permitting and inspection authority. Cities such as Denton, Frisco, and Lewisville also publish local food and event guidance.

Mobile food vendors and food trucks

This is the biggest licensing change in this refresh. Beginning July 1, 2026, anyone operating as a mobile food vendor in Texas must hold a DSHS mobile food vendor license for each food vending vehicle. DSHS assigns license types based on the food operation and performs or coordinates the required licensing inspection.

The state license does not erase all local rules. Denton says local mobile food operators must still follow city location and zoning rules. Frisco says mobile food vendors must comply with non-conflicting local fire, location, and zoning rules. Lewisville says DSHS now handles mobile-food health permitting and routine health inspection, while city zoning, fire, right-of-way, special-event, and other local ordinances still apply.

Use the Texas DSHS Mobile Food Vendors page. For unincorporated Denton County, also check the county Fire Marshal because county fire permitting can still apply.

What different Denton County business types should verify