---
type: "Bill"
title: "Property Tax Valuation"
description: "The act specifies that when a property tax assessor values real property, the property tax assessor shall consider:"
jurisdiction: "us/states/co"
legislature: "Colorado General Assembly"
session: "2023A"
identifier: "SB 23-304"
citation: "Colorado SB 23-304 (2023A)"
classification: ["bill"]
subjects: []
status: "enacted"
primary_sponsors: ["Bob Marshall", "Chris Hansen", "Shannon Bird", "Steve Fenberg"]
version_count: 9
action_count: 15
vote_count: 5
first_action: "2023-05-01T06:00:00+00:00"
last_action: "2023-05-24T06:00:00+00:00"
source: "openstates"
source_identifier: "ocd-bill/aed05831-faaa-4122-a3d9-6c998de932d4"
source_url: "https://leg.colorado.gov/bills/sb23-304"
source_hash: "86ec81ece0eb53dbde243146a8b5fae5b501b6b52eca6332756248d5d392db57"
vintage: "2026-07-01"
source_snapshot: "https://data.openstates.org/daily/2026-07-01/public.pgdump"
retrieved_at: "2026-07-06"
confidence: "reported"
tags: ["legislation", "bill", "us-co"]
---

# Colorado SB 23-304 (2023A) — Property Tax Valuation

The act specifies that when a property tax assessor values real property, the property tax assessor shall consider:

## Version chain

The bill's text revisions, in order — the diff chain from filing to enrollment.

1. **Committee Amendment** (committee substitute) — [source](https://leg.colorado.gov/sites/default/files/2023a_sb304_h_fin_001.pdf)
2. **Engrossed (05/03/2023)** (committee substitute) — [source](https://leg.colorado.gov/sites/default/files/documents/2023A/bills/2023a_304_eng.pdf)
3. **Final Act (05/15/2023)** (committee substitute) — [source](https://leg.colorado.gov/sites/default/files/documents/2023A/bills/2023a_304_enr.pdf)
4. **Introduced (05/01/2023)** (committee substitute) — [source](https://leg.colorado.gov/sites/default/files/documents/2023A/bills/2023a_304_01.pdf)
5. **PA1 (05/06/2023)** (committee substitute) — [source](https://leg.colorado.gov/sites/default/files/documents/2023A/bills/2023a_304_h_fin_01.pdf)
6. **Reengrossed (05/04/2023)** (committee substitute) — [source](https://leg.colorado.gov/sites/default/files/documents/2023A/bills/2023a_304_ren.pdf)
7. **Rerevised (05/08/2023)** (committee substitute) — [source](https://leg.colorado.gov/sites/default/files/documents/2023A/bills/2023a_304_rr2.pdf)
8. **Revised (05/06/2023)** (committee substitute) — [source](https://leg.colorado.gov/sites/default/files/documents/2023A/bills/2023a_304_rev.pdf)
9. **Signed Act (05/24/2023)** (committee substitute) — [source](https://leg.colorado.gov/sites/default/files/2023a_304_signed.pdf)

## Votes

- RECEDE — **44–19** (pass) · lower
- REPASS — **44–19** (pass) · lower
- BILL — **44–20** (pass) · lower
- ADHERE — **35–0** (pass) · upper
- BILL — **29–6** (pass) · upper

## Sponsors

- Bob Marshall — primary (person)
- Chris Hansen — primary (person)
- Shannon Bird — primary (person)
- Steve Fenberg — primary (person)

## Timeline

The legislative action history — every referral, reading, and vote.

- **2023-05-24T06:00:00+00:00** Governor Signed `executive-signature`
- **2023-05-15T06:00:00+00:00** Sent to the Governor `executive-receipt`
- **2023-05-15T06:00:00+00:00** Signed by the Speaker of the House
- **2023-05-10T06:00:00+00:00** Signed by the President of the Senate
- **2023-05-08T06:00:00+00:00** House Third Reading Passed - No Amendments `passage, reading-3`
- **2023-05-08T06:00:00+00:00** House Considered Senate Adherence - Result was to Recede
- **2023-05-08T06:00:00+00:00** Senate Considered House Amendments - Result was to Adhere
- **2023-05-07T06:00:00+00:00** House Third Reading Passed - No Amendments `passage, reading-3`
- **2023-05-06T06:00:00+00:00** House Second Reading Special Order - Passed with Amendments - Committee, Floor
- **2023-05-05T06:00:00+00:00** House Committee on Finance Refer Amended to House Committee of the Whole `committee-passage, referral-committee`
- **2023-05-04T06:00:00+00:00** Introduced In House - Assigned to Finance `introduction`
- **2023-05-04T06:00:00+00:00** Senate Third Reading Passed - No Amendments `passage, reading-3`
- **2023-05-03T06:00:00+00:00** Senate Second Reading Special Order - Passed - No Amendments
- **2023-05-02T06:00:00+00:00** Senate Committee on Finance Refer Unamended to Senate Committee of the Whole `committee-passage, referral-committee`
- **2023-05-01T06:00:00+00:00** Introduced In Senate - Assigned to Finance `introduction`

## Source

OpenStates / OpenCivicData bulk snapshot [2026-07-01](https://data.openstates.org/daily/2026-07-01/public.pgdump); origin `ocd-bill/aed05831-faaa-4122-a3d9-6c998de932d4`. Confidence: reported (aggregated from official Colorado legislature records).