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# Selling a Home You Have Owned for Decades in Colorado
- URL: https://truenorthboulder.com/guides/selling-a-long-held-boulder-home/
- Published: 2026-08-07T16:00:00.000Z
- Updated: 2026-08-08T01:00:18.000Z
- Description: On a long-held Colorado home the basis is rarely what anyone on the deed assumes. Colorado is not a community-property state, so on a first death only the decedent's interest takes the date-of-death value and a surviving co-owner's interest keeps its original cost. Title decides which is which.
- Author: Daniel Hsieh
- Tags: Seller Guide, Selling, Colorado Law

A home held for thirty years has a number attached to it that nobody on the deed can state from memory, and it is not the purchase price and not today's value. It is the basis, and what a long-held sale owes turns on it.

The common assumption is that after a death the basis becomes the current value and the accumulated gain goes away. In a handful of states that is right. **In Colorado it is only half right, and the half is literal.**

## Only part of it moves

**IRC § 1014(a)** gives property acquired from a decedent a basis equal to *"the fair market value of the property at the date of the decedent's death."* The full reset most people have heard about is a different provision: **§ 1014(b)(6)** reaches the surviving spouse's half too, but only for community property held *"under the community property laws of any State."*

**Colorado has no such laws.** The IRS lists the nine states that do: Arizona, California, Idaho, Louisiana, Nevada, New Mexico, Texas, Washington and Wisconsin. Colorado is an equitable-distribution state and is not among them, so the exception cannot reach a home bought here with income earned here.

What that leaves is in the IRS's own basis publication: *"your basis in property you owned with your spouse as a qualified joint interest is the cost of your half of the property with certain adjustments."* **Where spouses were the only joint tenants, half the basis moves to date-of-death value and half keeps what was paid for it decades ago.**

**And here is the part almost everyone gets backwards: the step-up is measured at the date of death, not today.** If the first death was in 2015, the stepped-up half froze at the 2015 value, and every dollar since has accrued to *both* halves. Take a house bought around 2000 for roughly $300,000, a first death some years ago, and a sale near the $1,266,912 median single-family price for a home sold in Boulder in June 2026\. The basis is not $300,000, not $1,266,912, and not half of each. It is half the original cost plus half of what the house was worth on the date of death. *(Round illustrative figures; only the median is a published statistic.)*

**If nobody obtained a valuation at the time, you can still order one.** Appraisers do retrospective date-of-death appraisals routinely for estates, and it gets harder as the comparable sales recede.

![A five-branch router diagram on a dark green plate: one question, ‘How is title actually vested?’, branching to five vesting types — sole ownership by the decedent, sole ownership by the survivor, tenancy in common, joint tenancy between spouses, and joint tenancy with a non-spouse — each with a bar showing how much of the basis takes date-of-death value and its governing Internal Revenue Code section.](https://storage.ghost.io/c/7c/ec/7cec6ddd-8aeb-4e8c-923a-e353e04b082d/content/images/2026/08/selling-a-long-held-boulder-home-infographic.png) 

How a long-held Colorado home’s basis steps up at a death, routed by how title is vested. Colorado is not a community-property state, so IRC § 1014(b)(6)’s full reset on both halves cannot reach a home bought here. **Sole ownership by the person who died:** steps up in full (§ 1014(a)). **Sole ownership by the surviving owner:** no step-up at all, the mirror image. **Tenancy in common:** steps up on the deceased owner’s fractional share (§ 1014(a)). **Joint tenancy where spouses are the only joint tenants:** exactly one-half, with nothing to trace (§ 2040(b), qualified joint interest). **Joint tenancy with a non-spouse:** traced by who furnished the consideration, and can be far more or far less than half (§ 2040(a)). The step-up is measured at the date of death, not today. Which row applies to a given property is a reading of the recorded deed, not something this chart decides. IRC §§ 1014 and 2040; IRS Publication 551, *Basis of Assets*, rev. December 2025\. Not tax or legal advice.

## Which part is decided by how title is vested

- **Sole ownership by the person who died.** The whole basis steps up. **The mirror image matters as much: a home the surviving owner held alone gets no step-up at all.**
- **Tenancy in common.** The decedent's fractional share steps up; the other owner's does not.
- **Joint tenancy between spouses.** Where spouses are the only joint tenants, **§ 2040(b)** makes it a qualified joint interest and *"the value included in the gross estate… is one-half."* Exactly half, without tracing anything.
- **Joint tenancy with someone who is not a spouse.** **§ 2040(a)** applies instead, and inclusion tracks who furnished the consideration. **⛔ If that sentence has you thinking about adding an adult child to your deed, stop.** It is generally a completed gift, their share carries your basis rather than a stepped-up one, their creditors and any divorce reach the house, you cannot sell or refinance without their signature, and at closing their share of the gain gets no home-sale exclusion because they do not live there.
- **A trust.** A revocable living trust generally leaves the property includible in the decedent's estate, so that share steps up. **Other trusts do not behave that way**: a home placed in an irrevocable or credit-shelter trust at an earlier death may take no further step-up. Which one you have is a reading of the trust, not the deed.
- **A beneficiary deed.** Colorado has had these since 2004 (C.R.S. § 15-15-401 *et seq.*). The owner keeps full ownership and control during life, the beneficiary has no present interest, it is revocable, and the property stays in the estate. It is the instrument most people are reaching for when they think about adding a child to a deed.

**The practical way to see your title is not the county portal.** Ask your agent to order an **ownership and encumbrance report** from a title company: current vesting plus everything recorded against the property, usually within a day. The clerk-and-recorder route works too, with one caveat that bites exactly these homes. **Boulder County's online index reaches back only to mid-1980 and Larimer County's to 1971**, so a 1974 purchase is a book search in person. Recording follows the county the property sits in: Boulder County for Boulder, Lyons, Niwot and Gunbarrel; **Boulder or Weld for Longmont, and Larimer or Weld for Berthoud, since both straddle a county line**; Larimer for Loveland.

**Then the conclusion is not ours.** Which of these your title actually is, and what it produces, is a legal reading of instruments we have not seen. Worth doing before a listing appointment, because if someone who has died is still on title, clearing the record can take a week or a quarter depending on the path, and the slow path is what blows contract deadlines.

Two things we are not going to do

**We will not compute your basis.** It depends on title, on improvements over decades, on any period the home was rented, and on records that live with you rather than with us. What we can tell you is which questions decide it, and which document answers each one.

**And we will not point you at the workaround you will find online.** An elective community-property trust exists in five states (Alaska, Florida, Kentucky, South Dakota and Tennessee) and Colorado is not one. Colorado's Uniform Community Property Disposition at Death Act is a different instrument, governing property that already carries community character from somewhere else; it is not a way to elect that character here. Even where those trusts exist the federal treatment has no IRS guidance and no court ruling, so it is unsettled there rather than merely unavailable here. If you moved from a community-property state, or already hold such a trust, that is a live question for an estate attorney.

## Two things that move the number, and one that is gone

**If the home was ever rented, part of the gain is not excludable.** The home-sale exclusion does not reach gain equal to depreciation allowed or allowable for periods after May 6, 1997, and the IRS is explicit that this holds *"whether or not you were entitled to claim any depreciation."* Not claimed is not the same as not allowable. That portion is unrecaptured § 1250 gain, taxed at a rate up to 25 percent. In Boulder the common version is not a year abroad but **the basement apartment or the accessory dwelling unit** let for a stretch somewhere in a thirty-year hold, and a detached unit is a separate structure with a harder allocation than one inside the house. The exclusion itself is covered in our [capital-gains guide](https://truenorthboulder.com/guides/capital-gains-home-sale-colorado/).

**A Colorado amendment takes effect on August 12, 2026, and it is narrower than the coverage suggests.** HB26-1189 amended the Uniform Community Property Disposition at Death Act so it applies regardless of whether the person who died was domiciled here, reaching Colorado real property traceable to community property acquired under another jurisdiction's law. It is a scope clarification about domicile, and it does not make Colorado-earned property community property. The path it reaches: community property accumulated in California or Washington, used to buy Colorado real property, first death outside Colorado. **Whether the federal step-up follows is a question for a CPA and an estate attorney, and we are deliberately not answering it.**

**And one item to stop looking for.** The Qualified Senior Primary Residence Classification, which let an owner who moved carry a property-tax reduction to a new primary residence, was ended by SB26-116, signed June 2, 2026, for property tax years beginning on or after January 1, 2027\. The final year's windows have closed and there is no current window. What relief exists for a given year is the county assessor's answer.

## What conveys with the dirt, and what has to be assigned

A long-held home inside Boulder city limits is almost always on city water and city sewer, so there is usually no well permit, no on-site wastewater system and no agricultural classification in play. On an older annexed parcel, confirm rather than assume: those mechanics are real elsewhere and we have written them in the [Longmont guide](https://truenorthboulder.com/longmont/moving-to-longmont/), [Niwot vs Gunbarrel](https://truenorthboulder.com/guides/niwot-vs-gunbarrel/) and the [inspection guide](https://truenorthboulder.com/guides/home-inspection-boulder-county/).

**One thing does survive that list.** Some older parcels in north Boulder carry ditch shares, Silver Lake or Farmers Ditch among them, and **the regime differs from one company to the next.** Silver Lake's own guidance says its shares *"go with specific pieces of land and cannot be bought or sold as separate from the land."* Appurtenant. Other mutual ditch companies can work the opposite way, holding shares as corporate stock moved by assignment, and **a title commitment will show a ditch easement while generally not showing severable share ownership**, because personal property is not scheduled or insured. That is why they get left behind. So the first move is documentary and it is your agent's: read the granting clause of the deed and the prior deeds for a "together with … shares of the capital stock" recital, then ask the company which regime applies.

It belongs on this page rather than being trivia, because **severable shares are a separate asset with a separate basis.** If they transfer they are part of what is sold; if not, the seller still owns them after closing. **We will not tell you that your ditch shares convey, or that they do not.** Outside Boulder, different companies and different regimes apply.

Common questions

## Frequently asked

Does the basis of a Colorado home reset to today's value when one owner dies?+ 

Only the deceased owner's interest does. Under IRC section 1014 the date-of-death fair market value becomes the basis of property acquired from a decedent, but the full reset on both halves is available under section 1014(b)(6) only for community property held under the community property laws of a state. Colorado is not a community-property state, so on a first death the surviving owner's interest generally keeps its original cost. On a home bought decades ago that difference can be the largest single item on the seller's tax return, and it is a question for a tax advisor and an estate attorney reading the actual deed.

How does the way we hold title change the answer?+ 

It largely decides it. Sole ownership by the person who died steps up in full, and the mirror image matters just as much: a home the surviving owner held alone gets no step-up at all. Tenancy in common steps up on the deceased owner's fractional share. A joint tenancy between spouses who are the only joint tenants is a qualified joint interest under IRC section 2040(b), and exactly one-half is included and steps up. A joint tenancy with someone who is not a spouse falls under section 2040(a) instead, where inclusion tracks who furnished the consideration and can be far more or far less than half. Colorado also has a beneficiary deed, where the owner keeps full ownership and control during life, so the property stays in the estate. Have your agent order an ownership and encumbrance report from a title company and read how title is actually vested before assuming any of these applies to you.

Can we set up a community property trust in Colorado to get the full step-up?+ 

No. Colorado has no community-property-trust statute. Five states have enacted one, Alaska, Florida, Kentucky, South Dakota and Tennessee, and Colorado is not among them. Colorado's Uniform Community Property Disposition at Death Act is a different instrument: it governs property that already carries community character from another state, and it is not a way to elect that character here. Even in the five states that do allow it, the federal treatment has no IRS guidance and no court ruling behind it, so it is unsettled rather than merely unavailable.

We rented the house for a year decades ago. Does that matter?+ 

It can, and it is the item most often forgotten. The home-sale exclusion does not apply to gain equal to depreciation allowed or allowable for periods after May 6, 1997, and IRS Publication 523 states this is true whether or not you were entitled to claim any depreciation. That portion is unrecaptured section 1250 gain and is taxed at a rate up to 25 percent. A sabbatical, a relocation year or a year abroad can be enough to put it in play. Our capital-gains guide covers the exclusion itself in detail.

What is the senior property tax classification for someone who moved?+ 

It has been repealed. The Qualified Senior Primary Residence Classification, created by SB24-111, let an owner who moved and lost the Senior Property Tax Exemption claim a reduction at a new primary residence. SB26-116, signed on June 2, 2026, ends that classification for property tax years beginning on or after January 1, 2027, and the application windows for the final year have already closed. There is no current window to apply in. Ask your county assessor what relief exists for the year you are asking about rather than relying on any published summary, this one included.

## Start with the record, and mind the clock

The order that seems natural is backwards. **Title does not change what the house is worth; comparable sales decide that.** It changes what the price is worth to you, and sometimes whether and when you sell at all.

**⛔ And if a spouse has died, find out today whether the two-year window is still open**, because it runs from the date of death and it reorders everything else. IRC § 121(b)(4) lets a surviving spouse use the $500,000 exclusion rather than $250,000 only if the sale closes no later than two years after that date. A page telling you to take your time is the wrong page if that clock is running.

Then the sequence is short. **Order the ownership and encumbrance report.** **Assemble the basis file from sources that still exist**: permit history from the city or county building division, which shows the 1994 addition with a stated valuation; the assessor's characteristics record, which shows when finished square footage or a bathroom count changed; the original closing statement, which the title company may still hold; old returns if anything was ever depreciated. Thirty years of receipts is not the assignment, and a seller who thinks it is stops before starting. **Then take it to a tax advisor**, and to an estate attorney if a death is anywhere in the ownership history.

Holding is a real option and sometimes the right one, but it carries an over-large house, deferred maintenance, liquidity and that two-year clock. It is worth deciding on purpose rather than by default.

If you are selling a long-held home anywhere in our footprint, [tell us where the property is](https://truenorthboulder.com/contact/) and we will order the report, help you assemble the file, and sequence the sale around what it says. Our [net-proceeds guide](https://truenorthboulder.com/guides/seller-net-proceeds-colorado/) covers what lands after costs, and the [move-up seller guide](https://truenorthboulder.com/guides/how-to-sell-a-move-up-home-boulder/) covers the listing sequence.

*Daniel Hsieh is a licensed Colorado real estate broker with True North Boulder, brokered by eXp Realty.*

*Nothing here is tax or legal advice, and none of it is an opinion on any reader's situation. What you owe is a tax advisor's calculation, what your deed or trust creates is an estate attorney's reading, what a property-tax classification does is your county assessor's answer, and contract terms are yours to negotiate with your broker.*

Sources & data notes 
- Internal Revenue Code § 1014(a) and § 1014(b)(6) (the community-property exception, expressly limited to property held under the community property laws of a State); §§ 2040(a) and 2040(b) (joint interests; the qualified-joint-interest one-half rule for spouses who are the only joint tenants); § 1014(b)(2)–(3) and § 2038 (property in a revocable trust). [§1014](https://www.law.cornell.edu/uscode/text/26/1014?ref=truenorthboulder.com) · [§2040](https://www.law.cornell.edu/uscode/text/26/2040?ref=truenorthboulder.com). Retrieved 2026-08-02.
- IRS [Publication 551, Basis of Assets](https://www.irs.gov/publications/p551?ref=truenorthboulder.com), revised December 2025: the qualified-joint-interest basis rule quoted here, the contrasting community-property treatment, and the list of the nine community-property states. Colorado is not among them.
- IRC § 121(d)(6) (the exclusion does not reach gain equal to depreciation adjustments attributable to periods after May 6, 1997), § 1(h)(1)(E) (the 25 percent rate on unrecaptured § 1250 gain), and § 121(b)(4) (the two-year window for a surviving spouse to use the larger exclusion). IRS [Publication 523](https://www.irs.gov/publications/p523?ref=truenorthboulder.com) for use in preparing 2025 returns: depreciation "allowed or allowable," and that this applies whether or not the taxpayer was entitled to claim any. Retrieved 2026-08-02.
- Colorado [HB26-1189](https://leg.colorado.gov/bills/hb26-1189?ref=truenorthboulder.com), signed 2026-04-13, effective 2026-08-12, amending the Uniform Community Property Disposition at Death Act at C.R.S. § 15-20-103\. The scope stated here follows the enacted text and the Legislative Council Staff fiscal note; some secondary summaries describe the amendment more broadly.
- Colorado [SB26-116](https://leg.colorado.gov/bills/sb26-116?ref=truenorthboulder.com), signed 2026-06-02: ends the qualified-senior primary residence real property classification for property tax years beginning on or after 2027-01-01\. Colorado SB24-111 created that classification. Verified at the Colorado General Assembly 2026-08-02.
- Colorado beneficiary deeds: C.R.S. § 15-15-401 *et seq.* Colorado is an equitable-distribution state (C.R.S. § 14-10-113) and has enacted no community-property-trust statute; the five states that have are Alaska (Alaska Stat. § 34.77), Florida (Fla. Stat. § 736.1501 *et seq.*), Kentucky (Ky. Rev. Stat. § 386.620), South Dakota (S.D. Codified Laws ch. 55-17) and Tennessee (Tenn. Code § 35-17). As of 2026-08-02 there is no IRS guidance and no court ruling on the federal treatment of those trusts under § 1014(b)(6).
- Boulder single-family median $1,266,912, sold, June 2026 — [CAR Local Market Update (IRES data) via LBAR](https://lbaronline.com/category/housing-statistics/?ref=truenorthboulder.com). The illustrative purchase figure is not a published statistic and is used only to make the arithmetic legible. Re-verify against the then-current release at refresh.
- [Silver Lake Ditch and Reservoir Company, guidance for new users](https://silverlakeditch.org/new-users-faqs/?ref=truenorthboulder.com): shares go with specific pieces of land and cannot be bought or sold separately from the land. Other mutual ditch companies can operate differently; the transfer regime is company-specific and is confirmed with the company. The Colorado Division of Water Resources administers water rights and issues well permits; water courts adjudicate decrees. Retrieved 2026-08-02.
- Recording index coverage: Boulder County's online index reaches back to mid-1980 and Larimer County's searchable index to 1971; earlier instruments require an in-person search. Retrieved 2026-08-02.
- P.L. 119-21 (2025-07-04) did not amend § 121 or § 1014; Publication 523 for 2025 returns carries the rules unchanged.