Complete Colorado

Thornton resolution reaffirms local control over zoning, land-use

THORNTON–The Thornton City Council last week unanimously passed a resolution throwing their support to neighboring Westminster–along with five other Front Range Colorado municipalities—in an ongoing lawsuit against the state over home-rule authority.

Thornton, in the north Denver metro-area and with a population of around 145,000, shares a border with Westminster to the southwest.

In May, Westminster, along with Aurora, Arvada, Glendale, Greenwood Village, and Lafayette, filed a lawsuit against both the state and Gov. Jared Polis over the passing of two land use and zoning bills during the 2024 legislative session that the cities say infringe on their local authority guaranteed by the state Constitution. The cities are seeking an injunction against both the legislation and an accompanying executive order from Gov. Polis.

House Bill 24-1304, Minimum Parking Requirements, bars municipalities within a metropolitan planning organization (MPO) from enacting and enforcing minimum parking requirements for multi-family developments.

House Bill 24-1313, Housing in Transit-Oriented Communities, mandates local governments designated as “oriented transit communities” to increase zoning capacities to enable state-defined housing density goals.

Governor Polis signed both bills into law in early May.

The Thornton resolution, introduced by Councilwoman Jessica Sandgren, denounces both bills, as well as an executive order from Gov. Polis’ threatening to withhold discretionary or competitive funding, such as grants, contracts, loans, or tax credits, from municipalities that refuse to comply with the mandates.

“Our resolution makes it clear: Thornton reaffirms its constitutional authority under Article 20, Section 6 to govern land use and zoning locally, based on community input and our own comprehensive vision for growth—not one-size-fits-all state mandates,” wrote Thornton Mayor Jan Kulmann in a Facebook post.

Kulmann also expressed her desire to send a copy of the city’s resolution directly to Gov. Polis.

“As Thornton’s mayor, I believe we know what works best for our residents—and that local elected leaders, working hand ‑in ‑hand with our community, are best positioned to lead thoughtful, sustainable development,” concluded Kulmann.

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