Building permits, zoning and land rules in Fannin County, Texas

Fannin County generally does not require a county building permit for a typical home or outbuilding in unincorporated territory outside its two lake zoning areas^1,2. Within both the Lake Ralph Hall and Bois d'Arc Lake zoning areas, non-exempt new structures over 1,000 square feet need a Lake Area Development (Building) Permit before construction begins^3,4. Agricultural buildings, remodels or expansions of existing single-family homes, and accessory buildings on lots of at least two acres are among the stated building-permit exemptions in both lake areas^3,4. Lake-area construction governed by that building-permit process requires a final zoning-compliance inspection before the county issues a Utility Connection Certificate⁵. Fannin County has not identified a comprehensive county building-code edition or countywide building-inspection program outside the lake areas, so ask Development Services about the parcel and project. Acting as your own contractor does not waive building permits or inspections; state law provides only a narrow exemption from a notice-related penalty when its conditions apply⁹.

Fannin County Development Services handles Lake Area Development (Building) Permits and zoning approval in the Lake Ralph Hall and Bois d'Arc Lake areas, plus subdivision plats and county-road culvert or right-of-way permits; reach the office at 903-449-4220 or development@fanninco.net at 1203 E. Sam Rayburn Drive, Bonham, TX 75418¹⁰. Inside an incorporated city, ask that city's building and zoning office what local approval applies; county lake zoning yields when annexed property leaves the county map, and higher municipal standards control². Fannin County Environmental Development still handles septic permits and inspections countywide at 903.583.7495 or septicpermits@fanninco.net¹. The county Floodplain Administrator handles floodplain development permits at 903-640-8484¹¹. Development Services directs applicants to MGO Connect for county permit applications and supporting documents¹⁰.

Fannin County administers zoning in two specific lake areas rather than uniformly across the county². Lake Ralph Hall has adopted zoning districts shown on the county's map; the regulated area may reach property within 5,000 feet of the shoreline at elevation 551 feet^3,12. Bois d'Arc Lake has its own mapped zoning districts, so ask Development Services which district and standards apply to the parcel^10,12. Agricultural uses, buildings, and structures are exempt from the landscape section in each lake area's regulations, but that limited exemption does not remove other zoning, subdivision, or septic requirements^2,13. In three named Lake Ralph Hall districts, a HUD-Code manufactured home may be used as a residence³. Outside the lake areas, Fannin County has not confirmed a private-RV occupancy rule, tiny-home occupancy rule, or countywide minimum home size; ask Development Services about the exact parcel.

Fannin County requires a septic permit and approved plan before an on-site sewage facility is constructed, altered, repaired, extended, or operated⁶. Environmental Development must issue an Authorization to Construct before work begins, and the county must inspect the installation before it is covered⁶. Arrange that inspection at least one working day ahead; a successful inspection leads to an Authorization to Operate⁶. The current checklist lists a $375 residential fee, $550 commercial fee, $150 repair fee, and $100 reinspection fee⁶. Applicants need a TCOG-assigned 911 address, and aerobic systems require an ongoing service contract and recorded maintenance affidavit⁶. Only 6.6% of county soils are rated without severe limits for a conventional drain field⁷. Texas has a narrow exemption for a single-family home on at least 10 acres when every condition is met, including keeping every OSSF component at least 100 feet from the property line¹⁴.

Fannin County has not confirmed a countywide rule for living in an RV or tiny home on a private tract outside the Lake Ralph Hall and Bois d'Arc Lake zoning areas, so the general building-permit answer is not permission to occupy one. At RV parks within either lake zoning area, an RV may remain no more than 60 calendar days during any 12-month period^3,15. Those RV-park limits do not establish a rule for an owner occupying one RV on a private tract or for ordinary short-term rental of a dwelling^3,15. Unincorporated-county subdivision rules separately reach RV parks and manufactured-home parks with two or more rented lots¹⁶. HUD-Code manufactured homes are allowed as residences in three named Lake Ralph Hall districts, but the county has not confirmed a tiny-home rule as such³. Call Development Services with the parcel and proposed use before buying.

1. Ask Development Services whether the parcel is in a city or the Lake Ralph Hall or Bois d'Arc Lake zoning area, and identify the mapped district^10,12.
2. If county lake zoning applies, determine whether the project needs a Lake Area Development (Building) Permit or qualifies for an exemption^3,4.
3. Submit county building, zoning, subdivision, floodplain, or driveway applications through MGO Connect as applicable¹⁰.
4. Obtain a 911 address, secure the septic Authorization to Construct, and arrange the required pre-cover septic inspection at least one working day ahead⁶.
5. If lake-area building rules apply, complete the required final zoning-compliance inspection before the Utility Connection Certificate is issued⁵.
6. Obtain a county driveway-culvert permit before disturbing county road right-of-way⁸.
7. For state-highway access, submit TxDOT Form 1058 and give 24 hours' notice before construction¹⁷.

Start with the city boundary and lake zoning maps because location changes which building permit and zoning approval apply². Dividing land into two or more parts in unincorporated Fannin County generally requires a plat, including lots over 5 acres, RV parks, and manufactured-home parks with two or more rented lots¹⁶. A qualifying agricultural, farm, ranch, wildlife-management, or timber-production division may avoid platting only while every daughter tract remains in the qualifying use and no land is laid out for public or shared use¹⁶. The plat exception does not remove minimum frontage or setback requirements¹⁶. Published subdivision fees vary by application and can include per-lot and engineering charges, so get the current total from Development Services¹⁸. Only 6.6% of county soils are rated without severe limits for a conventional drain field⁷. Also verify floodplain development and road-access permits before closing^8,17,19. The effective property-tax rate is 1.1%, with a median annual bill of $2,356⁷.