Off-Grid Living in Broomfield County, Colorado

Broomfield County presents a genuine puzzle for off-grid prospectors. It is Colorado's only consolidated city-county—a legal merger that makes Broomfield simultaneously a municipality and a county government—and that structural ambiguity runs directly through its land-use and building administration. I spent weeks cross-referencing municipal code, Board of Health guidance, building department resources, and Colorado statewide water and septic law. The result is clear: one threshold rule that actually restricts off-grid viability, and a cluster of critical unknowns that demand you contact officials directly before buying or building.

The One Clear Restriction: Mandatory Sewer Connection Within 100 Feet

This is the single rule I can confirm with certainty. Broomfield's Board of Health, under B.M.C. 13-28-020(A)(1), requires any property to connect to the public sewer main if that main lies within 100 feet of the property line. This is absolute—no alternatives, no variance process described in public sources. For anyone seriously considering off-grid sewage (via septic, composting toilet, or alternative systems), this rule is a dealbreaker on any property in an area with mature sewer infrastructure.

What matters: Most developed or semi-developed parcels in Broomfield, especially near towns or subdivisions, likely have mains within that distance. The 100-foot threshold is *stricter* than Colorado's state baseline under Regulation 43, which permits septic systems across many rural areas. Broomfield has chosen the harder standard, presumably because it prioritizes centralized wastewater management in this consolidated jurisdiction. If you are considering a Broomfield parcel, your first step is to contact the Broomfield Board of Health and ask them to confirm whether the property's location triggers the 100-foot rule. If it does, off-grid sewage is off the table. If the main is more than 100 feet away, you move to the second tier of uncertainty.

Septic and Wastewater: What Happens Beyond 100 Feet

If your parcel falls outside the 100-foot sewer mandate, Colorado state law (Regulation 43) becomes your baseline. At that point, you would need a septic permit from the Broomfield Board of Health. Regulation 43 requires site evaluation—soil boring, percolation testing, depth to groundwater, setbacks from wells and surface water—and an approved system design before installation. I found no Broomfield-specific septic code that adds additional restrictions or streamlines the process, but that does not mean such county requirements don't exist. The safest approach: contact the Board of Health with your parcel's location and ask for septic feasibility. They can tell you the actual cost, timeline, and any county-level add-ons to state requirements.

Composting toilets are legally viable under state law but only as a last resort—Regulation 43 restricts them to sites where a conventional septic system cannot pass soil evaluation. Any unit must carry NSF or equivalent certification. Broomfield's code does not appear to explicitly prohibit composting toilets, but the Board of Health would need to approve them as an alternative to septic if septic is infeasible. Again, ask directly.

Building Codes: Contemporary Standards, No Off-Grid Carve-Outs

Broomfield adopted the 2024 Building Code, Mechanical Code, Plumbing Code, and 2023 Electrical Code, all effective April 2026. These are standard contemporary codes—no off-grid-specific prohibitions, no unusual restrictions on alternative systems. However, they do mean any structure you build must meet current standards: insulation levels, electrical safety, plumbing sizing, and ventilation all follow 2024 baselines. If you are planning a tiny home, an alternative dwelling structure, or a retrofit, you will be subject to these codes. The Broomfield Building Department can clarify which code sections apply to your specific design.

One note: These codes do not themselves permit or prohibit off-grid systems. Whether a solar power system, composting toilet, or rainwater system is allowed is determined by zoning, septic/wastewater policy, and utility regulations—not by building code. Building code governs *how* you build; other authorities govern *what* you can do with the building.

Zoning and Land-Use Classifications: Maps Exist, County Code Does Not

Broomfield has zoning maps and documented land-use classifications, and the city-county maintains a municipal code with zoning chapters (Title 17). However, I could not locate specific Broomfield county ordinances that detail: - Whether raw land (undeveloped parcels) can legally be occupied full-time by an owner - Subdivision minimums or limits on parcel size - Dwelling unit density or alternative dwelling type approval processes

Colorado statewide, parcels under 35 acres face strict subdivision limits—a key reason off-grid buyers target 35-acre-or-larger tracts. Broomfield may have similar rules, but I did not find them explicitly stated in public sources. This is a critical gap. Before purchasing a parcel, request the zoning code for your property and ask the Broomfield Planning & Zoning Department whether your parcel can be occupied full-time in its current state, or whether subdivision, lot consolidation, or other approval is required.

Dwelling Types: Tiny Homes, RVs, and Alternatives—Officially Unclear

I found no Broomfield county code that explicitly addresses: - Tiny homes under 400 sq ft - Tiny Houses on Wheels (THOWs) or other mobile structures - RVs as permanent residence - Yurts, geodesic domes, or other alternative dwellings

Statewide, Colorado recognizes tiny homes (under 400 sq ft) in state code, but THOWs are treated as RVs and generally cannot serve as permanent residences unless a county or municipality explicitly allows it. Broomfield's code may permit or prohibit any of these, but I could not confirm either way. If you are planning to live in anything other than a conventional stick-built house, contact the Broomfield Building Department and Planning & Zoning Department and ask whether your structure type is permitted as a primary residence in your zoning district.

Private Wells: Uncertain Jurisdiction in a City-County

Broomfield is served by municipal water infrastructure and does not appear to have a large population of private well users. I found no Broomfield-specific regulations on private well permitting, depths, or use restrictions. However, Colorado state law absolutely applies: all wells require a permit from the State Engineer (Division of Water Resources), regardless of county. Parcels of 35 acres or more typically qualify for an exempt domestic well, allowing limited household use and irrigation. Smaller lots are restricted to household use only.

The key question: Is your parcel eligible for an exempt well, or would you need to apply for a conventional (non-exempt) well permit? If your parcel is under 35 acres or in a defined basin with senior water rights holders, permitting may be difficult or impossible. Contact the Division of Water Resources early—well permitting is entirely outside Broomfield's jurisdiction, but it is a hard constraint on your ability to achieve off-grid water independence. Ask whether your parcel and proposed use qualify for an exempt well.

Greywater Reuse: State Authorization, Local Administration Unclear

Colorado state regulation permits greywater reuse (shower, bath, and sink water) on-site if a local program is in place. In counties without an approved greywater program, greywater must be treated as sewage and disposed of through an approved system (septic, municipal sewer, or equivalent). I found no evidence of a Broomfield-specific greywater reuse program in public sources. This suggests that greywater may default to sewage treatment—meaning it would go to your septic system (if you have one) or to the municipal sewer (if you are connected).

Contact the Broomfield Board of Health and ask explicitly: "Does Broomfield have an adopted greywater reuse program, or does greywater default to sewage treatment?" If there is no local program, on-site greywater reuse may not be permitted. If a program exists, they can provide the technical requirements (system design, testing, permitted uses).

Rainwater Harvesting: Likely Restricted Under Prior Appropriation

Colorado's Doctrine of Prior Appropriation is strict: rainwater is considered a water resource, and harvesting is closely regulated. Statewide baseline: most households may collect no more than 110 gallons total across two rain barrels. Properties with an exempt residential well have broader (but still limited) rights to use captured rainwater on-site. I found no Broomfield county code that modifies this baseline. Assume the 110-gallon limit applies unless Broomfield has explicitly adopted a more permissive local rule—which I could not confirm. Contact the Broomfield Board of Health or Planning Department and ask whether the state 110-gallon limit applies, or whether the county has adopted different rainwater harvesting rules.

Utility Disconnection: No State Requirement, But Practical Limits

Colorado has no state law requiring connection to the electric grid or municipal water, so solar, wind, and hauled water are legally viable in most rural areas. However, I found no Broomfield-specific code that explicitly allows grid disconnection. Practically speaking, once you build a permitted structure, the codes and permits that govern it (septic, building code, plumbing code) assume the structure is tied to *some* waste system and *some* water supply—but not necessarily to municipal or grid services.

Before building, contact the Broomfield Building Department and ask: "If I install solar power and a composting toilet (or septic, or other off-grid systems), will I be required to maintain connections to the electrical grid or municipal sewer?" The answer will clarify whether off-grid is truly viable on your parcel, or whether "permitted" does not actually mean "livable off-grid."

Practical Sequence for Broomfield Off-Grid Prospects

1. Confirm sewer proximity. Contact Broomfield Board of Health with your address. Ask whether the property falls within the mandatory 100-foot sewer connection zone. If yes, off-grid sewage is unavailable. If no, proceed to step 2.

2. Confirm parcel and dwelling eligibility. Contact Broomfield Planning & Zoning Department. Ask: (a) Is this parcel zoned for full-time residential occupancy in its current state? (b) What dwelling types are permitted (tiny homes, RVs, stick-built houses, etc.)? (c) Are there density, subdivision, or lot-size restrictions?

3. Assess septic feasibility. Contact the Broomfield Board of Health. Ask whether the parcel's soils and groundwater depth likely support a septic system, and what the permit cost and timeline are.

4. Check well eligibility. Contact the Colorado Division of Water Resources (not Broomfield). Ask whether your parcel qualifies for an exempt domestic well or whether a non-exempt well permit would be required. This is the most time-consuming and uncertain step.

5. Confirm greywater, rainwater, and utilities. Contact the Broomfield Board of Health and Building Department. Ask about greywater reuse regulations, rainwater harvesting limits, and grid/utility disconnection requirements. Document their answers in writing.

6. Engage an engineer and surveyor. If the above steps are favorable, hire a licensed professional to do a site evaluation and confirm septic feasibility, well drilling potential, and building envelope for the structure you envision.

Why Broomfield's City-County Status Complicates This

Broomfield's consolidated government means some authorities—like the City of Broomfield planning department—handle matters that in other counties are split between county and municipal government. Public sources (county code online, Board of Health websites) don't always clearly delineate which office handles off-grid questions. When you call, you may be transferred or told "that's not our department." Persist. Ask for the specific office that handles septic alternatives, greywater, rainwater, and non-traditional dwellings. Document the name and phone number of the person who answers, because inconsistent information is common when jurisdiction is unclear.

The Bottom Line

Broomfield County allows off-grid living in principle—there is no blanket prohibition—but a mandatory sewer connection within 100 feet of the property line effectively eliminates off-grid sewage in developed areas. For parcels beyond that threshold, septic is theoretically possible under state law, and wells, greywater, rainwater, and alternative dwellings have no documented county-level prohibitions. However, Broomfield has not published clear, comprehensive off-grid regulations, so each component of your system (sewage, water, electricity, dwelling) requires separate confirmation with the appropriate county office. Before buying, invest the time to call the Building Department and Board of Health. The answers you get will determine whether a parcel is genuinely off-grid-viable or simply permitted but practically constrained.