Bolthole Index

Weld County, Colorado

Zoning, building permits and septic rules in Platteville, Colorado

The Town of Platteville, Weld County, Colorado adopts its own zoning, and building permits are required for construction inside town limits12. Septic permits and wells are not decided by the town: septic is handled by Weld County Environmental Health Services, which we could not confirm for addresses inside town3. For land outside town limits, use the Weld County page.

At a glance

Building permit
Required inside town limits; small sheds of 120 sq ft or less and a few other items are exempt2
Zoning
Town zoning with A-H, RE, R-1 and other districts1
Building code
2024 International Residential Code, with local amendments4
Septic
Weld County Environmental Health Services runs septic permits in the county; confirm for in-town addresses3
RV living
Storage only; sleeping limited to 7 nights in a row and 21 nights a year5
Accessory dwelling
Allowed on lots where a single-family home is permitted6
Wells
New wells need a state well permit from the Division of Water Resources7

Who to call

Planning & zoning

Town of Platteville Town Hall (planning and zoning)

Zoning and land-use applications inside Platteville; first contact for pre-application review

970-785-2245

400 Grand Avenue Platteville, Colorado 80651

Septic permits

Weld County Environmental Health Services (On-Site Wastewater Treatment Systems / Septic)

Septic permits, site evaluations and inspections in Weld County

(970) 400-6415

1150 O St., Greeley, CO 80631

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

Off-grid gear

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

These are affiliate links — we may earn a commission, at no cost to you. As an Amazon Associate, Bolthole Index earns from qualifying purchases.

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

Yes. The Town of Platteville zones land inside town limits under Chapter 16 of its code, with districts that include Agricultural/Holding (A-H), Residential Estate (RE) and Low Density Residential (R-1)1. Lot rules differ by district. In A-H, the minimum lot is 5 acres and 200 feet wide unless the lot comes from a subdivision exemption or cluster development8. In RE, the minimum lot area is one half acre9. In R-1, it is 5,000 square feet10.

Setbacks also vary. A-H requires 25 feet in front and 50 feet on each side and rear11. RE requires 25 feet in front and 20 feet at the rear for a principal structure12. R-1 requires 20 feet in front and 25 feet at the rear13.

Townwide, a second dwelling is possible: an accessory dwelling unit is a permitted use on any residential lot where a single-family detached home is permitted, though an RV or camper cannot serve as one6. We found no tiny home provision, so ask Town Hall how a tiny home on a foundation would be classified14.

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

Yes. Inside the Town of Platteville, construction, alteration, moving, demolition or a change of occupancy requires a building permit from the town's Building Official2. A one-story detached shed of 120 square feet or less, and fences not over 6 feet, are among the exemptions2. The town adopted the 2024 International Residential Code, with local changes in section 18-10-304.

The town issues a permit only if the site conforms to zoning, has legal access, meets water and sewer connection rules and the fees are paid2. A certificate of occupancy from the Building Official is required before a building is used15. We could not confirm inspection steps, owner-builder rules or the fee schedule, so ask Town Hall at14.

How do septic permits work inside Platteville?

In Weld County, the Environmental Health Services Division oversees septic permitting for onsite wastewater treatment systems with flows under 2,000 gallons per day, including site evaluations, design reviews and inspections3. We could not confirm that this office handles septic for addresses inside Platteville, and the town expects new buildings to meet its water and sewer connection rules16. A lot inside town may therefore be required to connect to town sewer rather than install a septic system.

Where a septic system is allowed, the county requires a permit for new, repaired, upgraded or reconnected systems, and a permit is not issued until the forms and fees are submitted17. Colorado law has each local board of health set its own detailed septic rules18. Call19 before you plan any system.

Can you live in an RV in Platteville?

Not as a home. On private residential property in Platteville, RVs, boats and trailers are limited to storage, and the code allows only incidental overnight sleeping for up to 7 consecutive nights and 21 nights in a calendar year5. An RV also cannot be permanently connected to sewer, water or electric service5. Approved RV parks and campgrounds may not allow any stay longer than 29 days20.

Manufactured homes are narrower still: a Type II manufactured home may be placed only in an approved manufactured home community of at least 3 acres21.

Building a home in Platteville: the steps, in order

  1. Confirm the zoning district of the lot and its setbacks, height and lot coverage with Town Hall14.
  2. Ask Town Hall about a pre-application review if the project needs land-use or zoning approval14.
  3. Confirm how water and sewer will connect, since the building permit depends on it16.
  4. Apply to the Building Official for a building permit and pay the fees2.
  5. If a septic system is allowed on the lot, contact Weld County Environmental Health Services19.
  6. Obtain the certificate of occupancy before moving in15.

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

Septic permits, floodplain permits for unincorporated land and the county's building rules are Weld County matters; the county's floodplain and building permits apply only outside town limits22. For land outside Platteville, see the Weld County page.

A new well needs a permit from the state Division of Water Resources7. A driveway directly onto a state highway needs a state access permit23. Weld County's median property tax bill is $2,242 a year24.

Watch-outs

  • We could not confirm whether Weld County or the town handles septic permits for addresses inside Platteville, so call Town Hall and Weld County Environmental Health Services before buying19.
  • We could not confirm the town's building permit fees, inspection steps or owner-builder rules; ask Town Hall14.
  • Cluster developments can change lot sizes and coverage limits from what a district normally allows10.

Sources

  1. Sec. 16-2-60. Residential Estate (RE) District (Town of Platteville), quoted and re-checked
  2. Sec. 16-3-10. Building Permit; Certificate Of Occupancy Required (Town of Platteville), quoted and re-checked
  3. Environmental Health Services, quoted and re-checked
  4. Sec. 18-10-10. Adoption (Town of Platteville), quoted and re-checked
  5. Sec. 16-3-120. Storage And Parking Of Recreational Vehicles, Boats And Trailers (Town of Platteville), quoted and re-checked
  6. Sec. 16-3-20. Accessory Dwelling Units (Town of Platteville), quoted and re-checked
  7. Water Administration (Colorado statewide rule), quoted and re-checked
  8. Sec. 16-2-40. Agricultural/Holding (A-H) District (Town of Platteville), quoted and re-checked
  9. Sec. 16-2-60. Residential Estate (RE) District (Town of Platteville), quoted and re-checked
  10. Sec. 16-2-70. Low Density Residential (R-1) District (Town of Platteville), quoted and re-checked
  11. Sec. 16-2-40. Agricultural/Holding (A-H) District (Town of Platteville), quoted and re-checked
  12. Sec. 16-2-60. Residential Estate (RE) District (Town of Platteville), quoted and re-checked
  13. Sec. 16-2-70. Low Density Residential (R-1) District (Town of Platteville), quoted and re-checked
  14. Town of Platteville Town Hall (planning and zoning) (platteville.colorado.gov)
  15. Sec. 16-3-10. Building Permit; Certificate Of Occupancy Required (Town of Platteville), quoted and re-checked
  16. Sec. 16-3-10. Building Permit; Certificate Of Occupancy Required (Town of Platteville), quoted and re-checked
  17. New System, Repair, Vault, and Statement of Existing, quoted and re-checked
  18. Title 25 - Public Health and Environment - Colorado Revised Statutes 2024 (Colorado statewide rule), quoted and re-checked
  19. Weld County Environmental Health Services (On-Site Wastewater Treatment Systems / Septic) (weld.gov)
  20. Sec. 16-4-80. RV Parks And Campgrounds (Town of Platteville), quoted and re-checked
  21. Sec. 16-4-60. Manufactured Home Communities (Town of Platteville), quoted and re-checked
  22. Floodplain Management – Weld County, quoted and re-checked
  23. Access Permits | Frequently Asked Questions (Colorado statewide rule), quoted and re-checked
  24. Median property tax bill: Bolthole Index county data

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.

Answers from the rulebook for Town of Platteville

Town of Platteville’s own rules

  • Building permitRequired

    Construction, alteration, moving, demolition or occupancy change inside Platteville town

    • Exempt: one-story detached accessory structures of 120 sq ft or less, fences not over 6 ft, retaining walls not over 4 ft, and other listed items.
    • Permit issued only if site conforms to zoning, has legal access, water/sewer connection requirements are met, and fees are paid per Appendix A.

    exempt shed floor area: <= 120 sq ft (one-story detached tool/storage shed)

    “shall first make application to the building official and obtain the required permits.”
  • Building code adoptedAdopted

    Residential construction inside Platteville town

    • Subject to additions, deletions, insertions and changes in Section 18-10-30 (not reviewed).
    • Other building code articles not reviewed.

    residential code edition: IRC 2024 (local amendments in 18-10-30)

    “The International Residential Code, 2024 Edition as published by the International Code Council”
  • Certificate of occupancyRequired

    Buildings and structures inside Platteville town

    • Issued by the Building Official; does not approve code violations.
    “No building or structure shall be used or occupied, and no change in the existing occupancy classification of a building or structure or portion thereof shall be made until the Building Official has issued a Certificate of Occupancy”
  • Local zoningPresent

    Land inside Platteville town limits

    • Chapter 16 - Zoning establishes districts including A-H, RE, R-1 and others.
    “The Residential Estate (RE) district is established to accommodate large lot residential development generally located on the edge of a Stable Urban or Developing Urban area”
  • Minimum lot sizeSpecified

    Agricultural/Holding (A-H) District inside Platteville town

    • Minimum lot width 200 ft.
    • Five-acre minimum does not apply to subdivision exemption or residential cluster development.

    minimum lot area: >= 5 acres (subdivision exemption or residential cluster development)

    “minimum lot area: five (5) acres unless as part of subdivision exemption or a residential cluster development. (2) minimum lot width: two hundred (200) feet.”
    2 more reviewed findings on this topic
    • Specified — Residential Estate (RE) District inside Platteville town
      “minimum lot area: one half (½) acre. (2) minimum lot width: seventy-five (75) feet. (3) maximum gross density: one (1) dwelling unit/structure per acre.”
    • Specified — Low Density Residential (R-1) District inside Platteville town
      “minimum lot area: five thousand (5,000) square feet. (2) minimum lot width: twenty-five (25) feet.”
  • SetbacksSpecified

    Low Density Residential (R-1) District inside Platteville town

    • Corner lots: 25 ft from each adjacent street.
    • Minimum 10 ft between principal structures.
    • Detached garage with alley access needs 18 ft; street access without alley needs 10 ft.

    front setback: >= 20 ft · side setback: >= 5 ft (or 1 ft per 3 ft of building height, whichever is greater) · rear setback principal: >= 25 ft (10 ft for accessory structures)

    “front: twenty (20) feet. b. side: five (5) feet or one (1) foot for every three (3) feet of building height, whichever is greater. c. rear: twenty-five (25) feet for principal buildings and ten (10) feet for accessory structures. (6) minimum corner lot setback: twenty-five (25) feet from each adjacent street.”
    2 more reviewed findings on this topic
    • Specified — Residential Estate (RE) District inside Platteville town
      “front: twenty-five (25) feet. b. side: ten (10) feet plus an additional five (5) feet for any structure over eighteen (18) feet. c. rear: twenty (20) feet for principal structure and ten (10) feet for all accessory structures.”
    • Specified — Agricultural/Holding (A-H) District inside Platteville town
      “front setback: twenty-five (25) feet. (6) side yard setback: fifty (50) feet. (7) rear setback: fifty (50) feet.”
  • Lot coverageSpecified

    Low Density Residential (R-1) District inside Platteville town

    • Cluster development may allow up to 80% lot coverage per lot.

    maximum impervious coverage: <= 35 percent (cluster development)

    “maximum impervious coverage: thirty-five percent (35%).”
    2 more reviewed findings on this topic
  • Building heightSpecified

    Agricultural/Holding (A-H) District inside Platteville town

    • Agricultural structures 50 ft; storage structures 75 ft.

    maximum principal residential height: <= 30 ft

    “maximum height: principal residential building - thirty (30) feet; agricultural structures - fifty (50) feet; storage structures - seventy-five (75) feet.”
    2 more reviewed findings on this topic
  • Living in an RVLimited

    RVs, boats and trailers on private residential property inside Platteville town

    • Residential parking is for storage only; not in front yard; hard-surfaced area; 10 ft from street/curb/sidewalk and 5 ft from alley.
    • Not permanently connected to sewer, water or electric service.
    • RE district max four units outside enclosed structure; other districts max two.

    incidental sleeping: 7 consecutive nights, 21 nights per calendar year (stored on private property with owner permission)

    “Used for dwelling purposes, except that incidental overnight sleeping for periods not exceeding seven (7) consecutive nights and not more than twenty-one (21) nights in any one (1) calendar year is permitted”
  • Camping on your landLimited

    Camping inside Platteville town, via approved RV parks and campgrounds

    • Campgrounds/RV parks must meet CDPHE standards 6 CCR 1010-9 and the listed standards.
    • Campgrounds not permanent residences except owner/manager and maintenance personnel.
    • Camping on residential lots limited to RV incidental sleeping rule (7 nights/21 per year).

    maximum continuous occupancy: <= 29 days

    “Continuous occupancy of outdoor recreation accommodations including RV sites, tent sites, tipi sites, yurts, cabins, park homes and casitas shall not exceed twenty-nine (29) days.”
  • Manufactured homesLimited

    Type II manufactured homes inside Platteville town

    • Allowed only in a manufactured home community approved through a conditional review use permit by the Board of Trustees.
    • Community minimum 3 acres, 320 ft wide; max 8 homes per acre.
    • Type I manufactured home treatment not reviewed.

    minimum community size: >= 3 acres

    “It is unlawful for any person to cause or permit a Type II manufactured home to be placed or installed upon any real property in the Town except in a manufactured home community”
  • Accessory dwellingsAllowed

    ADUs on residential lots where a single-family detached dwelling is permitted, inside Platteville town

    • One ADU per lot; no larger than 75% of principal dwelling.
    • Property owner must reside on the property when building permit application is filed.
    • Connected to principal dwelling's water and wastewater unless Town approves separate connections in writing.
    • One off-street parking space; no separate ownership or subdivision.
    • Mobile home, RV, travel trailer or camper cannot be used as an ADU.

    maximum ADU size: <= 75 percent of principal dwelling

    “On any residential lot where a single-family detached dwelling unit is a permitted use, an ADU shall also be a permitted use.”
  • Mandatory utility hookupConditional

    New buildings inside Platteville town needing a building permit

    • Building permit requires compliance with Chapter 13 connection requirements to Town water and sanitary sewer; Chapter 13 distance/availability rule not opened.
    • Subdividers must install water and sewer for all platted lots and connect to the Town system.
    “The requirements of Chapter 13 of this Code regarding connection to the Town water and sanitary sewer systems have been or will be complied with.”
  • Subdividing landRegulated (with conditions)

    Subdivisions inside Platteville town

    • Chapter 17 subdivision regulations apply; cluster developments require a subdivision plat.
    • Sewer design must be accepted by the Town, Weld County Department of Public Health and Environment and CDPHE.
    “The subdivider shall construct and install a sanitary sewer system for all platted lots within the subdivision”

Still unanswered

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

  • Owner-builder exemption — Owner-builders inside Platteville town
  • Inspections — Inspections inside Platteville town
  • Minimum dwelling size — Single-family dwellings inside Platteville town
  • Tiny homes — Tiny homes inside Platteville town
  • Who permits septic — Septic systems inside Platteville town
8 more unanswered
  • Septic permit
  • Septic inspection
  • Off-grid sanitation
  • Well permit
  • Agricultural exemption
  • Building in a floodplain
  • Short-term rentals
  • 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 Platteville publishes no rule on the point, not that none exists. Weld County’s page lists the county offices to call.

← All of Weld County: county rules, score and offices