Denver is a low-effective-tax, high-price market with a property tax system that behaves very differently from Texas or the Sun Belt. Colorado does not reset your assessed value when you buy, reappraises on a two-year cycle, and keeps adjusting the residential assessment rate through legislation. The traps here are the metro districts and the moving rate, not a post-sale spike.
Biennial reassessment, no sale reset
Colorado county assessors reappraise real property every two years, in odd-numbered years, based on a defined market period. Your purchase does not trigger a reassessment the way a Texas sale does. That is the good news for buyers: you inherit the current value until the next cycle.
The complication is the assessment rate. Colorado taxes a fraction of market value, and the legislature has repeatedly changed that fraction since the repeal of the Gallagher Amendment. For 2025, residential and multifamily property is assessed at roughly 6.25% for the local-government portion and 7.05% for the school portion, down from a prior 6.7%, with further formula-based changes scheduled. Combined with mill levies, Denver's effective rate lands near 0.53% of market value, one of the lowest of any major metro.
Because the assessment rate is a legislative moving target, model the current-year rate and understand that your tax can move at the next reappraisal even if you do nothing. Do not assume the seller's bill is stable across the cycle.
Metro districts are Denver's version of a MUD
This is the item that catches buyers. Newer master-planned developments across the Denver suburbs (large parts of Adams, Douglas, Broomfield, and outer Arapahoe counties, and communities like Green Valley Ranch, Stapleton/Central Park, and the Aurora and Thornton growth corridors) sit inside metropolitan districts. These special districts issue bonds to finance infrastructure and levy their own mills on top of the county and school levy.
A metro district can add a large amount to the effective rate, sometimes doubling it versus a comparable property outside a district. It is easy to miss because the base county rate looks low. Always confirm whether your parcel sits inside a metro district before underwriting suburban Denver, and pull the district's mill levy.
Hail is the insurance story
The Front Range is one of the most hail-prone corridors in the country. Roof claims are frequent, and insurance has hardened accordingly. Get a real quote before you offer, and pay attention to roof age and material.
Permits and the renovation story
Major work in the City and County of Denver requires a permit through Denver's development services and e-permit system. Cross-reference "renovated" claims against the permit record. See the full guide to checking permit history.
The broker pitch, translated
- "Taxes are low": true at the county level, but confirm there is no metro district stacking a second levy on top.
- "Stable assessment": the assessment rate is a legislative variable and reappraisal is biennial. Model the current rate and expect movement.
- "Value-add in the suburbs": check for a metro district and pull its mill levy before you price the deal.
- "Cap rate is X%": ask for the NOI math, including reserves, management, and the full effective rate with any district.
The standard checklist still applies
The Denver items above sit on top of the general pre-offer due diligence checklist: permit history, code violations, demographics, debt-service stress test, and FEMA flood zone (the South Platte and its tributaries put parts of the metro in mapped zones). The metro-district question is the one most likely to blow up a Denver pro forma. Full tax modeling guide.
Or get the Denver research done for you
DealBrief pulls county assessment, the current assessment rate and combined mill levy, sale history, permit records, FEMA flood zone, and the full debt-service scenario grid for any Denver multifamily address. Your first report is free.