Selling inherited co-owned real estate — when everyone's consent is needed, and selling only your own share

In short: to sell inherited co-owned real estate "as a whole," you need the consent of all co-owners (Civil Code Article 251(1) — the rule for change/disposition). Your own share alone, on the other hand, can be sold to a third party without the others' consent. But a share alone has limited use, so its price tends to fall and buyers are few. When talks break down, you move to co-ownership partition (Civil Code Articles 256 and 258), and once it turns into a dispute it is the lawyer's territory. As a premise for selling, the inheritance registration (mandatory from April 2024) must be done first.

You want to sell an inherited family home or land that became co-owned among siblings, but no one is in step — here the first branch is between "selling the whole while co-owned" and "selling only your own share." This article is for heirs unsure how to sell co-owned real estate: what to confirm first and who to consult, set out from the Civil Code and the Real Property Registration Act. The way of selling, valuation and finding a buyer are handled by our company (Yotsuba Real Estate Co., Ltd.) as information; legal judgment rests with qualified professionals.

Why does selling co-owned real estate as a whole need every co-owner's consent (Civil Code Article 251)?

Selling (disposing of) co-owned property to a third party changes the property's physical and legal state at its root. Civil Code Article 251(1) provides that no co-owner may make a change to the co-owned property (other than one not accompanied by a marked change in its shape or utility) without the consent of the other co-owners. Selling the whole is such a change/disposition, so the consent of all co-owners is required.

The 2021 Civil Code amendment (the review of the co-ownership system; effective 1 April 2023) organised the rules as follows.

Type of act	How it is decided	Basis
Preservation (maintenance, repair)	Each co-owner may do it alone	Civil Code Art. 252(5)
Management (leasing, minor change)	Decided by a majority of the value of shares	Civil Code Art. 252(1)
Change / disposition (sale, major alteration)	Consent of all co-owners	Civil Code Art. 251(1)

In other words, "a majority is in favour, so it can be sold" does not hold. Selling the whole needs everyone's consent. How to proceed when dividing inherited real estate by conversion (sale) is at how a conversion division of inherited real estate proceeds; whether consent is needed when you inherit a building on leased land is at when the inherited home sat on leased land. Inherited real estate in general is at inheritance and real estate.

Can you sell only your own share without the others' consent?

You can. A co-owner may freely transfer their own share to a third party without the consent of the other co-owners. A share is a right belonging to each co-owner, and its disposition is left to each person's freedom (the freedom of disposition inherent in ownership).

This is where confusion arises. "Selling the whole = everyone's consent required," but "selling a share = can be done alone." Whether the object is "the co-owned property itself" or "your own share" completely changes the consent needed.

• Selling the whole: consent of all co-owners (Civil Code Art. 251(1))
• Selling a share: each co-owner can do it alone (no consent of the others)

That a share can be sold, however, is different from its selling well. The next section looks at the practice of selling a share.

Who buys a share, and why does the price tend to fall?

Someone who buys only a share cannot use the property freely alone. They must use it together with the other co-owners, or settle matters again through co-ownership partition. For this reason, buyers of a share are few and the price tends to fall.

Point	Content
Buyer	In practice limited to firms specialising in buying co-ownership shares, or other co-owners wanting to tidy up the co-ownership
Price	Because it cannot be used alone and partition costs effort and money, it tends to be lower than market price × share ratio
After	The buyer may seek partition, pressing the remaining co-owners to respond
Use	It can be an option when you "want quick cash" or "talks with the others aren't moving"

Selling a share can be an "exit when no one is in step," but it tends to be unfavourable on price and affects the relationship with the remaining co-owners. The usual order of thinking is: first seek agreement to sell the whole, and consider a share sale as an option when that is hard. We can present the valuation and the comparison of ways to sell.

When talks break down, from where does co-ownership partition become the lawyer's territory?

A co-owner may demand partition of the co-owned property at any time (Civil Code Article 256(1); but a no-partition agreement for a period of up to five years is possible). When agreement is not reached, or a co-owner will not join the talks, partition may be demanded of the court (Civil Code Article 258(1)). The court orders one of: partition in kind; compensation partition (one takes it and pays the others); or division of proceeds by auction.

Stage	Content	Who
Talks	Co-owners discuss the method of sale / partition	The co-owners themselves
Agreement to sell the whole reached	To brokerage / sale contract	Licensed real estate agent
Agreement not reached	Co-ownership partition claim (litigation / mediation)	Lawyer

From the stage where talks break down and it becomes a dispute, it is the lawyer's territory. Representation in a co-ownership partition claim, and responding when talks among co-owners develop into a dispute, are handled by a lawyer — not by our company or an administrative scrivener. We assist with the sale / brokerage where agreement is reached.

Why must the inheritance registration be done before selling (the 2024 mandate)?

To sell or transfer a share, the registry must have settled whose name the property is in. For real estate acquired by inheritance, the inheritance registration (transfer of name from the deceased to the heirs) must be done first.

Article 76-2 of the Real Property Registration Act requires an heir who acquires real estate by inheritance to apply for the inheritance registration within three years of the day they learn that inheritance has commenced for them and that they have acquired the ownership (effective 1 April 2024). Neglecting it without justifiable grounds may attract a non-penal fine.

• While the name remains the deceased's, the sale registration (transfer to the buyer) cannot be done
• If the estate-division agreement is settled, the inheritance registration is done on its terms
• The inheritance registration and share-transfer registration are the work of a judicial scrivener

The mandate applies whether or not you sell. If you are considering selling, doing the inheritance registration first is the premise.

Consent, registration, tax and brokerage — who do you ask (separate engagement)?

Selling co-owned real estate involves several professionals. Dividing the roles:

What to do	Who
Way of selling, valuation, finding a buyer, brokerage, sale contract	Licensed real estate agent (Yotsuba Real Estate Co., Ltd.)
Preparation of the estate-division agreement	Administrative scrivener (Yotsuba Administrative Scrivener Office)
Inheritance registration, share-transfer registration	Judicial scrivener
Co-ownership partition claim, disputes among co-owners	Lawyer
Capital-gains tax, acquisition-cost calculation	Tax accountant

The capital gain (the sale amount less acquisition cost and transfer expenses) and how to treat the acquisition cost of inherited real estate are set out in the National Tax Agency's tax answers (No. 3252 what counts as acquisition cost; No. 3270 acquisition cost and time of acquisition of land/buildings acquired by inheritance or gift; No. 3202 how to calculate capital gains). The specific tax calculation and filing are handled by a tax accountant.

Who should you consult?

The way of selling co-owned real estate, valuation, finding a buyer, brokerage and the sale contract are handled by Yotsuba Real Estate Co., Ltd. (licensed real estate agent, Tokyo Governor (1) No. 113304). Preparation of documents such as the estate-division agreement is handled by Yotsuba Administrative Scrivener Office. The inheritance registration and share-transfer registration are handled by a judicial scrivener; a co-ownership partition claim and other cases where talks break down into a dispute, by a lawyer; capital-gains tax and acquisition-cost calculation, by a tax accountant.

These are independent business entities. You engage each directly. We neither pay nor accept referral fees or introduction commissions. Registration goes to a judicial scrivener, disputes to a lawyer, tax to a tax accountant, and employment and social insurance to a certified social insurance labour consultant (Yotsuba Certified Social Insurance Labour Consultant Office) — each engaged by you directly. Consultation is free of charge.

Frequently asked questions

Q. Three of us siblings co-own it. Can we sell if two agree?
A. To sell the whole, the consent of all co-owners is required (Civil Code Art. 251(1)). What a majority can decide is a management act such as leasing (Art. 252(1)); a sale (disposition) needs everyone's consent. If not everyone is aligned, consider selling only your own share, or settling through co-ownership partition.

Q. The other co-owners oppose the sale. Can I sell just my share?
A. Your share alone can be sold to a third party without the others' consent. But buyers of a share alone are few, and because it cannot be used alone the price tends to fall — take note. The usual order is to first seek agreement to sell the whole, and consider a share sale as an option when that is hard. We can present the valuation and comparison.

Q. Talks are at an impasse. What should we do?
A. A co-owner may demand partition at any time (Civil Code Art. 256(1)), and when talks are not settled, may demand partition of the court (Art. 258(1)). The court orders partition in kind, compensation partition, or division of proceeds by auction. From the stage it becomes a dispute it is the lawyer's territory. Where agreement is reached, we assist with the sale / brokerage.

Q. The name is still my late parent's. What should I do first?
A. Before a sale or share transfer, the inheritance registration (transfer of name from parent to heirs) must be done. It became mandatory from 1 April 2024, requiring application within three years of learning of the acquisition (Real Property Registration Act Art. 76-2). Inheritance and share-transfer registration are the work of a judicial scrivener. Preparation of the estate-division agreement is undertaken by an administrative scrivener.

Sources (primary)

• e-Gov "Civil Code" — Act No. 89 of 1896. Arts. 249–262-3 (co-ownership): Art. 251(1) (change of co-owned property — the all-consent rule), Art. 252 (management — majority of the value of shares — and preservation), Art. 256 (demand for partition), Art. 258 (partition by the court). The review of the co-ownership system is the 2021 amendment, effective 1 April 2023. Accessed 2 September 2026.
• e-Gov "Real Property Registration Act" — Act No. 123 of 2004. Art. 76-2 (mandatory application for registration of transfer of ownership by inheritance; within three years of learning of the acquisition; effective 1 April 2024). Accessed 2 September 2026.
• NTA tax answer No. 3252 "What counts as acquisition cost" — the scope of acquisition cost for capital gains. Accessed 2 September 2026.
• NTA tax answer No. 3270 "Acquisition cost and time of acquisition of land/buildings acquired by inheritance or gift" — Accessed 2 September 2026.
• NTA tax answer No. 3202 "How to calculate capital gains (separate taxation)" — Accessed 2 September 2026.

The specific application of change/management/partition of co-owned property, the price of a share sale, and the choice of partition method (in kind, compensation, auction) vary with the individual circumstances. This article does not assess any individual case. Disputed cases should be referred to a lawyer. Specific calculation and filing of capital-gains tax and acquisition cost go to a tax accountant; inheritance and share-transfer registration, to a judicial scrivener.

This article is general information. It does not judge or guarantee the feasibility of any particular sale or the tax amount. Investigation and brokerage, and the sale contract, are undertaken by Yotsuba Real Estate Co., Ltd. (licensed real estate agent); preparation of the estate-division agreement and other documents, by Yotsuba Administrative Scrivener Office — independent business entities, engaged separately and directly. We neither pay nor accept referral fees.

About the author

Joji Uramatsu — licensed real estate transaction specialist (Tokyo Governor registration No. 293544) and administrative scrivener (registration No. 25087022). Representative Director, Yotsuba Real Estate Co., Ltd. (licensed real estate agent, Tokyo Governor (1) No. 113304); principal, Yotsuba Administrative Scrivener Office. Kohinata, Bunkyo, Tokyo, about five minutes' walk from Myogadani station. Property and the sorting of rights and procedures (inheritance, registration, tax) are put on the same table. Full profile: author page.