Bolthole Index

Grand County, Colorado

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

The Town of Granby, Colorado runs its own building permits and zoning inside town limits, through its Community Development department and the Cloudpermit portal12. Granby builds under the 2021 International Building Codes3. We could not confirm who issues septic permits inside town, so ask the Town building department. Some Granby mailing addresses lie outside town limits and fall under Grand County1.

At a glance

Building permits
Town of Granby building department, applied for online through Cloudpermit1
Zoning
Town of Granby zoning inside town limits (Title 16)2
Building code
2021 International Building Codes, with local exceptions3
R/B district minimums
6,000 sq ft lot, 450 sq ft dwelling45
Septic inside town
Not confirmed inside town; Colorado requires a permit for any onsite system6
RV living inside town
Not confirmed inside town; unincorporated Grand County limits private camping to parcels of 35 acres or more7
Tiny homes (state rule)
State-approved tiny homes are allowed for long-term living where local zoning permits8

Who to call

Building permits

Town of Granby Building Department

Building permits inside Granby town limits, applied for through the Town's online permit portal

970-887-2501

[email protected]

Zero Jasper Avenue, Granby, CO 80446

Online permits →

Building permits

Grand County Building & Sanitation Division

Building permits and septic (OWTS) permits for unincorporated Grand County, outside Granby town limits

970-725-3255

308 Byers Avenue, Hot Sulphur Springs, CO 80451

Contact details are copied from each office’s official page and were checked against it on October 24, 2026.

Off-grid gear

Going off-grid in Town of Granby means bringing your own water and power. The kit we’d start with:

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Does Granby, Colorado have zoning, and what does it mean for lots and setbacks?

Yes. The Town of Granby zones land inside town limits under its own Title 16 zoning and development code2. Which district applies depends on the Town's 2025 official zoning map9. We could confirm only one district's numbers, so check the map for your parcel before relying on them.

In Granby's Residential/Business (R/B) district, the minimum lot area is 6,000 square feet and the minimum lot width is 50 feet4. Dwellings need at least 450 square feet of living area per unit5. Main buildings need a 20-foot front setback and 10-foot side and rear setbacks10. Buildings may cover up to 45 percent of the lot11 and may be up to 35 feet tall12. Those figures apply to R/B only; other Granby districts have their own tables.

Do you need a building permit in Granby, and who issues it?

Yes, with a caveat about where the address sits. Inside Granby town limits, the Town of Granby issues building permits, and applications go through its online permit portal113. The Town works under the 2021 International Building Codes, with exceptions in Granby Municipal Code 15.05.0403.

A Granby mailing address does not prove the lot is in town. The Town tells applicants to confirm the physical address against its 2025 official zoning map first1. Land outside town limits goes to Grand County instead, which requires a building permit for construction in the areas it administers14. We could not confirm the Town's fee schedule, inspection steps, certificate of occupancy rules or any owner-builder exemption, so ask the building department at 970-887-2501 ext. 2401.

How do septic permits work inside Granby?

We could not confirm who issues septic permits for lots inside Granby town limits, or whether a new home there must connect to public water and sewer. The Town's permits page mentions its water and sanitation departments but states no septic rule, so ask the Town building department before you assume either answer.

Colorado law sets the frame: no one may build, alter or install an onsite wastewater system without first getting a permit6, and a building not served by a sewage treatment works needs that permit before building or remodeling approval15. A final inspection is required before the system is used16. Outside town limits, Grand County's Building & Sanitation Division handles septic design review, permits and inspections1718. Grand County's septic permit fee is $850 for a new system19.

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

We could not confirm whether the Town of Granby allows living in an RV, or camping on private land, inside town limits. Call the Town building department before you park one.

For tiny homes, Colorado's Division of Housing says approved tiny homes are certified for long-term living, but the unit must also satisfy local zoning requirements8. In Granby's R/B district, any dwelling needs at least 450 square feet of living area5, so a very small tiny home may not qualify there. Confirm your district first.

Outside town limits the rules differ. Grand County allows an owner-builder one recreational camping vehicle for one year after the footing inspection in unincorporated Grand County20.

Building a home in Granby: the steps, in order

  1. Confirm the parcel's physical address is inside Granby town limits using the Town's 2025 official zoning map1.
  2. Find your zoning district and read its Title 16 chapter for lot size, setbacks and height9.
  3. Ask the Town building department how water, sewer or septic will be handled, since we could not confirm it13.
  4. If the lot touches a state highway, a CDOT access permit is needed for direct access21.
  5. Apply for the building permit through the Town's Cloudpermit portal1.
  6. Build to the 2021 International Building Codes as the Town adopts them3.

What stays with Grand County, and what to check before you buy in Granby

The Town's rules stop at its limits. For land outside Granby, use the Grand County page: the county's Planning & Zoning Division manages land use only in unincorporated Grand County22, and its Building Division administers building permits there14.

County-level context for a buyer: Grand County's effective property tax rate is 0.3%23, and its typical home value is $757,88624. Soils matter if you end up on septic: only 3.4% of the county's soils rate as not limited for a conventional drain field25, so expect an engineered system outside town.

Watch-outs

  • A Granby mailing address can be outside town limits, and then Grand County, not the Town, handles building permits1.
  • We could not confirm Granby's septic rules, utility connection requirements, RV rules or owner-builder exemptions; call the Town building department at 970-887-2501 ext. 2401.
  • The R/B district numbers apply to that district only, and other Granby districts were not confirmed9.

Sources

  1. Building Permits, Town of Granby, Colorado (Town of Granby), quoted and re-checked
  2. Chapter 16.65 Residential/Business District (R/B), Town of Granby, CO (eCode360) (Town of Granby), quoted and re-checked
  3. Building Permits, Town of Granby, Colorado (Town of Granby), quoted and re-checked
  4. Chapter 16.65 Residential/Business District (R/B), Town of Granby, CO (eCode360) (Town of Granby), quoted and re-checked
  5. Chapter 16.65 Residential/Business District (R/B), Town of Granby, CO (eCode360) (Town of Granby), quoted and re-checked
  6. Title 25 - Public Health and Environment - Colorado Revised Statutes 2024 (Colorado statewide rule), quoted and re-checked
  7. Grand County Zoning Regulations, quoted and re-checked
  8. Consumers of Manufactured Homes and Tiny Homes - HUD (Colorado statewide rule), quoted and re-checked
  9. Chapter 16.65 Residential/Business District (R/B), Town of Granby, CO (eCode360) (Town of Granby), quoted and re-checked
  10. Chapter 16.65 Residential/Business District (R/B), Town of Granby, CO (eCode360) (Town of Granby), quoted and re-checked
  11. Chapter 16.65 Residential/Business District (R/B), Town of Granby, CO (eCode360) (Town of Granby), quoted and re-checked
  12. Chapter 16.65 Residential/Business District (R/B), Town of Granby, CO (eCode360) (Town of Granby), quoted and re-checked
  13. Town of Granby Building Department (townofgranby.com)
  14. co.grand.co.us, quoted and re-checked
  15. Title 25 - Public Health and Environment - Colorado Revised Statutes 2024 (Colorado statewide rule), quoted and re-checked
  16. Title 25 - Public Health and Environment - Colorado Revised Statutes 2024 (Colorado statewide rule), quoted and re-checked
  17. co.grand.co.us, quoted and re-checked
  18. Grand County Building & Sanitation Division (co.grand.co.us)
  19. Septic Permit Information, quoted and re-checked
  20. Grand County Zoning Regulations, quoted and re-checked
  21. Access Permits | Frequently Asked Questions (Colorado statewide rule), quoted and re-checked
  22. Planning & Zoning, quoted and re-checked
  23. Effective property tax rate: Bolthole Index county data
  24. Typical home value (Zillow): Bolthole Index county data
  25. 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

Written October 24, 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.

Answers from the rulebook for Town of Granby

Town of Granby’s own rules

  • Building code adoptedAdopted (with conditions)

    New construction and alterations permitted by the Town of Granby inside town limits

    • The Town operates under the 2021 International Building Codes with exceptions listed in Granby Municipal Code § 15.05.040, which was not read within the research budget.
    • The specific code editions adopted in Chapter 15.05 (for example the residential and plumbing codes) were not verified on an official page.
    “the town of granby operates under the 2021 international building codes, with some exceptions as outlined in granby municipal code 15.05.040.”
  • Local zoningPresent (with conditions)

    Land inside Granby town limits, administered by the Town of Granby under its own Title 16 zoning and development code

    • Addresses listed as Granby, CO 80446 may be located outside town limits; the Town refers those to Grand County guidelines, so this claim does not cover them.
    • Only the R/B district chapter was opened; the full zoning chapter structure was not verified within the research budget.
    “the purpose of the residential/business district is to create a zone with residential and certain business uses which allows a mix of residential and business uses together”
  • Zoning districtsPartial

    Zoning districts inside Granby town limits

    • Published: the Town's 2025 official zoning map (referenced on the building permits page) and eCode360 Title 16 district chapters, including Chapter 16.65 R/B.
    • Partial: only the R/B district chapter was opened. The R-1 Single-Family Low Density chapter (16.45) could not be read, and the other district chapters were not enumerated within the budget.
    “by referring to the 2025 town official zoning map”
  • Minimum dwelling sizeDistrict specific (with conditions)

    Dwellings in the Residential/Business District (R/B), Granby Municipal Code § 16.65.040, inside Granby town limits

    • Site plan required yes, except for single-family development (same table).

    minimum gross floor area: >= 450 square feet of living area per dwelling unit

    “minimum gross floor area 450 square feet of living area per dwelling unit”
  • Minimum lot sizeDistrict specific (with conditions)

    Lots in the Residential/Business District (R/B), Granby Municipal Code § 16.65.040, inside Granby town limits

    • The same table lists a lot-width entry reading 'minimum plus 10 feet per unit over two units' after the 50-foot figure; that multi-unit increment is not applied here because the table layout was not resolved.
    • Site plan required yes, except for single-family development.

    minimum lot area: >= 6000 square feet · minimum lot width: >= 50 feet

    “minimum lot area 6,000 square feet minimum lot width 50 feet”
  • SetbacksDistrict specific (with conditions)

    Main buildings in the Residential/Business District (R/B), Granby Municipal Code § 16.65.040, inside Granby town limits

    • Site plan required yes, except for single-family development (same table).

    minimum front yard setback: >= 20 feet · minimum side yard setback: >= 10 feet · minimum rear yard setback: >= 10 feet

    “minimum front yard setback 20 feet minimum side yard setback 10 feet minimum rear yard setback 10 feet”
  • Lot coverageDistrict specific (with conditions)

    Lots in the Residential/Business District (R/B), Granby Municipal Code § 16.65.040, inside Granby town limits

    • Minimum open space 40 percent of the total lot area applies in the same table.

    maximum building coverage: <= 45 percent of lot

    “maximum building height 35 feet maximum building coverage 45 percent”
  • Building heightDistrict specific (with conditions)

    Buildings in the Residential/Business District (R/B), Granby Municipal Code § 16.65.040, inside Granby town limits

    • Height is measured from the same district table; the measurement method was not read.

    maximum building height: <= 35 feet

    “maximum building height 35 feet maximum building coverage 45 percent”
  • Subdividing landRegulated (with conditions)

    Division of land inside Granby town limits

    • Title 17 is the town's subdivision code; its standards, thresholds for exemption and approval steps were not read within the budget.
    “title 17 subdivisions (§ 17.05.010 &ndash; § 17.60.010)”
  • Permit processPartial

    Building permit application process for land inside Granby town limits

    • Applications go through the Town's online permit portal (Cloudpermit).
    • Before applying, confirm the address is inside town limits using the 2025 official zoning map; addresses outside town limits go under Grand County guidelines.
    • Contact: Town building department, [email protected], office 970-887-2501 ext. 240; office hours Mon-Thu 8:00 a.m.-5:00 p.m. and Fri 8:00 a.m.-4:30 p.m.
    “before applying for permits, ensure that your physical address is in the town of granby”

Still unanswered

We looked and could not find an official answer yet. Silence is not permission; ask Town of Granby or Grand County directly.

  • Owner-builder exemption — Owner-builder permit exemption inside Granby town limits
  • Inspections — Inspections of new construction inside Granby town limits
  • Certificate of occupancy — Certificate of occupancy for new homes inside Granby town limits
  • Living in an RV — Occupancy of an RV on private land inside Granby town limits
  • Camping on your land — Temporary camping on private land inside Granby town limits
13 more unanswered
  • Tiny homes
  • Manufactured homes
  • Accessory dwellings
  • Who permits septic
  • Septic permit
  • Septic inspection
  • Off-grid sanitation
  • Well permit
  • Mandatory utility hookup
  • Agricultural exemption
  • Driveway access
  • Building in a floodplain
  • Permit fees

Each answer was extracted from an official source and independently re-checked against that source by a second reviewer. That is an evidence check, not legal advice. Rules change; confirm with the authority before you buy or build.

Unanswered questions are usually a sign that Town of Granby publishes no rule on the point, not that none exists. Grand County’s page lists the county offices to call.

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