7 Signs Your Colorado Home Is Overassessed (and How to Check in 10 Minutes)

County assessors value every home in the county at once with statistical models. The models are decent on average — and routinely wrong on individual houses. Studies of mass appraisal consistently find a meaningful share of homes valued above what they'd really sell for. Here are the seven signs yours is one of them.

1. The county's record of your home is wrong

Pull up your property on your county assessor's website — every Colorado assessor offers a free public search (find yours in our county guides, or go straight to e.g. the Denver Assessor or Jefferson County Assessor) — and check the basics: finished square footage, bedroom and bathroom counts, basement finish, garage size, quality grade. Every inflated line item feeds directly into an inflated value. A recorded 2,400 sq ft when you actually have 2,100 is free money for the county until you correct it.

2. Nearby sales don't support your value

Find 3–5 genuinely similar homes (size, age, style, neighborhood) that sold during the assessor's study period. If they sold for less than your assessed value — especially per square foot — your value is suspect. This is the strongest single piece of appeal evidence in Colorado's market-approach system.

3. You bought recently for less than the assessed value

An arm's-length purchase of your own home near the study period is powerful evidence of its market value. If the county says $750k and you paid $690k six months before the appraisal date, that gap is hard for an assessor to defend.

4. Your home has problems the model can't see

• Roof at or past its lifespan, hail damage
• Foundation settling, drainage, or water intrusion
• Original kitchen or baths in a neighborhood full of remodels
• Single-pane windows, dead HVAC, knob-and-tube wiring

Mass-appraisal models assume average condition. If your home is below average for its area, you're being valued — and taxed — like the renovated house down the street.

5. Your lot has drawbacks the model ignores

Backing to a highway or rail line, steep unusable slopes, easements, power lines, odd shapes — location and lot quirks move real buyers' prices and frequently get flattened by the model into a neighborhood average.

6. Your value jumped far more than your neighborhood's

Reassessment increases should be broadly consistent across similar homes. If yours rose 28% while comparable neighbors rose 15%, something in your record or the model treated your home unusually — worth investigating either way.

7. You're in a heterogeneous neighborhood

Models perform worst where homes vary a lot — older urban blocks where a scrape-and-build sits next to a 1908 original, foothills properties with wildly different terrain, or condo buildings with mixed unit quality. Owners of the modest home on a fancy block are the classic over-assessment victims.

How to check yours in 10 minutes

1. Look up your property record on the county assessor's site and verify every fact.
2. Note your actual value and divide by your finished square footage.
3. Compare against recent sales of similar homes nearby on a listing site, using the same per-square-foot lens.
4. List any condition or lot issues a buyer would ding you for.

Or let us do it: enter your address and HomeTaxDrop pulls your county's actual records, your tax history, and a savings estimate in about a minute — free, and you only ever pay if we win you a reduction. If it looks strong, our step-by-step appeal guide shows what happens next.