Zoning, building permits and septic rules in the Town of Erie, Colorado

At a glance

Building permit

Issued by the Town of Erie Building Division, not the county¹

Zoning

Town zone districts under the Unified Development Code; uses not listed as permitted or special review are prohibited²⁴

Septic

Weld County Environmental Health Services in Weld County; the health office for any part of Erie in another county was not confirmed³

Accessory dwelling

One per lot, smaller than the main home; an RV cannot serve as one⁵

Manufactured homes

Manufactured home parks are a special review use in a few districts⁶

Floodplain

Floodplain rules apply to new construction in the special flood hazard area⁷

Wells

State well permit required for every new well⁸

Who to call

Contact details are copied from each office’s official page and were checked against it on October 16, 2026.

Do you need a building permit in the Town of Erie, Colorado?

Inside Erie town limits, the Town of Erie Building Division reviews construction plans, issues building permits and performs inspections¹. Erie's own permit guidance lists projects that need a building permit, among them room additions, basement finishes and accessory structures over 200 sq.ft.⁹. Erie's list also includes decks, fences and re-roofing, so even small exterior work usually starts with a call to the Building Division⁹.

We could not confirm Erie's owner-builder rules or its permit fees. Ask the Building Division before you price a project.

The Weld County Building Division issues building permits for unincorporated Weld County, not for land inside Erie¹⁰.

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

The Town of Erie Building Division handles building permits, plan review and inspections at 645 Holbrook St., and its phone is 303-926-2780¹. Applications are submitted electronically through the town's Self-Service Portal⁹.

The Planning Division, at 303-926-2770, handles land use applications and the Unified Development Code, so call it first when you are still deciding what you can build on a lot¹¹.

Building code updates take effect over time: the town adopted the 2024 energy code, the 2026 electrical code and the 2024 fire code, effective April 24, 2026¹².

Does Erie have zoning, and what does it mean for RVs, tiny homes and lot size?

The Town of Erie has its own zoning: the Unified Development Code, Title 10 of the town code, lists permitted uses by zone district, and any use not expressly listed as permitted or special review is prohibited². The town has many districts, from rural residential to industrial and agricultural/open space⁴.

One accessory dwelling unit is allowed per lot with a single-family home. It must be smaller than the main home, match its appearance, and cannot be an RV, travel trailer or camper⁵. Manufactured home parks are a special review use in a few districts⁶.

We could not confirm Erie's rules on living in an RV, tiny homes, minimum lot size or setbacks. Ask the Planning Division, and give it your parcel's zone district.

How do septic permits work inside Erie?

Septic permits are not a town function. Weld County Environmental Health Services administers on-site wastewater permits in Weld County³. Weld County's policy is to require public sewer where feasible and limit septic systems to areas where sewer is not feasible¹³.

For a lot inside a town, that means asking first whether public sewer reaches the lot. We could not confirm Erie's sewer connection rule, or which health department covers an address in a different county. Ask the Planning Division and the health department that serves your parcel.

Colorado requires a state permit for every new groundwater well, including residential wells⁸.

Building a home in Erie: the steps, in order

1. Call the Planning Division at 303-926-2770 with your parcel and confirm its zone district and whether the use is permitted¹¹.
2. Ask whether public sewer and water reach the lot, and if sewer does not, contact the health department for septic¹³.
3. Check the floodplain: new construction in the special flood hazard area has elevation requirements and a certified elevation⁷.
4. Apply for the building permit through the Self-Service Portal with the Building Division⁹.
5. Schedule inspections with the Building Division as work proceeds¹.

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

Weld County's zoning and building rules apply to unincorporated land, not to land inside Erie. For land outside town limits, see the Weld County page. Weld County's average farmland value is $3,798 per acre¹⁴, and its effective property tax rate is 0.5%¹⁵; these are county figures, not Erie figures.

Before you buy, confirm the parcel is inside town limits, its zone district, flood status and sewer service. Floodplain construction in Erie is regulated by the town; the floodplain administrator is the utilities director⁷.

Watch-outs

• We could not confirm Erie's permit fees, owner-builder exemption or whether a building permit is needed for every kind of project; ask the Building Division at 303-926-2780¹.
• Erie's rules on RV living, tiny homes, minimum lot size and setbacks were not confirmed; ask the Planning Division at 303-926-2770¹¹.
• A county rule such as Weld County's RV restriction applies to unincorporated land and should not be assumed to apply inside Erie¹⁶.

Sources

1. Town of Erie Building Division (erieco.gov)
2. Erie Code 10-3-1 Table of permitted uses (Town of Erie), quoted and re-checked
3. Environmental Health Services (2026 county census)
4. Erie Code 10-3-1 Table of permitted uses (Town of Erie), quoted and re-checked
5. Erie Code 10-3-3 Accessory uses and structures (Town of Erie), quoted and re-checked
6. Erie Code 10-3-2 Use-specific standards (Town of Erie), quoted and re-checked
7. Erie Code 10-14-10 Flood hazard reduction (Town of Erie), quoted and re-checked
8. Water Administration (Colorado statewide rule), quoted and re-checked
9. Town of Erie Building Division: permit requirements (erieco.gov)
10. Building Permit Applications and Inspections, quoted and re-checked
11. Town of Erie Planning Division (erieco.gov)
12. Town of Erie building codes (erieco.gov)
13. Weld County Environmental Health Services (On-Site Wastewater Treatment Systems / Septic) (weld.gov)
14. Farmland value per acre (USDA census): Bolthole Index county data
15. Effective property tax rate: Bolthole Index county data
16. Zoning Permit for Manufactured Home/Structures (ZPMH) Procedural Guide, quoted and re-checked

Written October 16, 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.