Civil Law and Co-Ownership Disputes in Europe

1. Introduction

Co-ownership exists when two or more persons hold ownership rights over the same property or asset. European civil-law systems generally recognise co-ownership but regulate it through different national rules concerning:

acquisition of shares;

possession and use;

management;

expenses and repairs;

income and profits;

transfer of a share;

consent for major transactions;

partition;

sale of the jointly owned property;

compensation between co-owners;

inheritance;

mortgages and creditors.

There is no single European Civil Code governing co-ownership. Property law remains substantially a matter of national law. EU law becomes relevant particularly where co-ownership disputes involve cross-border succession, matrimonial property, jurisdiction, private international law, consumer/property transactions, or fundamental rights.

2. Meaning of Co-Ownership

Co-ownership means that several persons have ownership rights in the same asset.

For example:

A owns 50% of a house and B owns 50% of the same house.

Neither necessarily owns a physically separated half of the building.

Instead, each owns a legal share in the whole property.

Common forms include:

Undivided co-ownership

Joint ownership

Co-ownership arising through inheritance

Co-ownership between spouses

Condominium/apartment ownership

Co-ownership of commercial property

Co-ownership of movable assets

3. Basic Civil-Law Principle

A useful general principle is:

Each co-owner has a share in the common property, but the exercise of that right must respect the corresponding rights of the other co-owners.

Therefore, one co-owner cannot ordinarily treat the entire property as if it belonged exclusively to him or her.

4. Example of Co-Ownership

Suppose:

A owns 40%;

B owns 35%;

C owns 25%.

The property generates €30,000 annual rental income.

Unless the applicable national law or agreement provides otherwise, the economic benefits will generally be allocated according to the parties' ownership interests.

Thus:

A → €12,000

B → €10,500

C → €7,500

But management decisions may not necessarily follow exactly the same percentages.

5. How Co-Ownership Arises

Co-ownership can arise through:

A. Purchase

Two people purchase a property together.

B. Inheritance

A deceased person's property passes to several heirs.

C. Gift

A property is gifted jointly to several people.

D. Marriage or matrimonial property regime

Depending on national law, spouses may acquire common property.

E. Construction

Several persons jointly acquire or construct a building.

F. Corporate or investment arrangements

Several investors may jointly hold property.

G. Court decision

A court may recognise or create rights resulting in co-ownership.

6. Shares in Co-Owned Property

Co-ownership normally involves undivided shares.

Example:

A owns 1/3.

B owns 1/3.

C owns 1/3.

Each person has an ownership interest in the entire property rather than a physically identified room or section.

This distinction becomes particularly important when:

one co-owner sells his share;

one co-owner mortgages the share;

the property is rented;

partition is requested.

7. Possession and Use

Each co-owner generally has rights to use the common property subject to the rights of the others.

For example, if A and B jointly own a holiday house, A cannot normally exclude B completely without a legal basis.

Disputes may arise concerning:

exclusive occupation;

access;

keys;

parking;

garden use;

storage;

rental;

commercial exploitation.

8. Exclusive Occupation by One Co-Owner

One of the most common disputes is:

Can one co-owner occupy the entire property without paying anything to the others?

The answer varies according to national law and the circumstances.

Courts may consider:

ownership shares;

agreement between the parties;

whether other co-owners were excluded;

whether exclusive occupation was authorised;

rental value;

expenses paid by the occupying co-owner.

A compensation or occupation indemnity may sometimes arise.

9. Management of Common Property

Co-owners must usually cooperate in managing the property.

Management can be divided into:

Ordinary management

Examples:

routine repairs;

maintenance;

insurance;

utility payments;

ordinary administration.

Extraordinary management

Examples:

major structural alterations;

demolition;

substantial redevelopment;

long-term disposal;

major mortgage;

substantial change in use.

The required level of consent differs between European legal systems.

10. Unilateral Acts by One Co-Owner

A co-owner normally cannot dispose of the entire property unilaterally if other persons own shares.

However, a co-owner may often have the power to dispose of his or her own share, subject to:

national law;

pre-emption rights;

contractual restrictions;

matrimonial-property rules;

registration requirements;

court orders.

Therefore:

Selling one's share is different from selling the entire jointly owned property.

11. Expenses and Repairs

Co-owners normally face expenses relating to:

taxes;

insurance;

maintenance;

structural repairs;

utilities;

management;

renovation.

A dispute frequently occurs where:

A pays €50,000 for roof repairs while B refuses to contribute.

The court may need to determine:

Was the expense necessary?

Was there an emergency?

Was prior consent required?

What percentage should each owner contribute?

Does the paying co-owner have a reimbursement claim?

12. Improvements to the Property

A co-owner may improve the property without obtaining the required consent.

Examples:

constructing an extension;

installing a swimming pool;

converting a garage;

renovating a kitchen;

changing commercial premises.

The other co-owners may argue:

the work was unauthorised;

it reduced property value;

it changed the property's character;

they should not have to contribute.

The financial consequences depend on national property law and the nature of the improvement.

13. Rental of Co-Owned Property

Another common dispute concerns renting the property.

Example:

A and B own an apartment.

A rents it to a third party without B's consent.

Possible questions include:

Was A authorised to lease the property?

Does the lease bind B?

Who receives rent?

Can B terminate the arrangement?

Is A liable for loss?

Was the tenant acting in good faith?

The answer depends heavily on national co-ownership and agency rules.

14. Profits and Income

Income generated by common property may include:

rent;

agricultural income;

commercial income;

royalties;

licensing revenue.

Generally, the economic entitlement is linked to the ownership shares unless an agreement or mandatory law provides otherwise.

A co-owner who receives the entire income may have an accounting/restitution obligation toward the others.

15. Accounting Between Co-Owners

A court may order one co-owner to provide an account of:

rent received;

expenses paid;

repairs;

insurance;

taxes;

profits;

property-management costs.

This is especially important where one co-owner has managed the property for several years.

16. Sale of the Common Property

One of the most difficult disputes occurs when:

A wants to sell, but B refuses.

Civil-law systems generally recognise mechanisms allowing a co-owner to seek partition or termination of the co-ownership.

The exact procedure differs significantly between countries.

Possible outcomes include:

physical division;

sale and division of proceeds;

transfer of the property to one co-owner with compensation to the others;

court-ordered sale.

17. Right to Partition

A fundamental principle in many continental European systems is that permanent co-ownership should not necessarily be imposed indefinitely on an unwilling co-owner.

A co-owner may therefore have a right to seek partition (partage/Teilung/division), subject to statutory exceptions.

For example:

A and B inherit a house.

A wants to retain the house.

B wants to terminate the co-ownership.

B may seek partition or another legally available mechanism.

18. Physical Partition

If legally and physically possible, the property may be divided.

Example:

A large parcel of land is divided into:

Plot 1 → A

Plot 2 → B

But physical division may be impossible where:

the property is a single apartment;

division violates planning law;

physical division substantially reduces value;

the property is indivisible.

19. Judicial Sale

Where physical partition is impossible, courts may order a sale according to the applicable national procedure.

The proceeds are then distributed according to:

ownership shares;

secured claims;

expenses;

other legally relevant priorities.

20. Buy-Out by One Co-Owner

Another solution is:

A keeps the property and pays B the value of B's share.

This can be particularly useful for:

family homes;

inherited properties;

agricultural land;

businesses;

holiday properties.

Valuation disputes can become central.

21. Valuation Disputes

The parties may disagree about:

market value;

rental value;

improvements;

outstanding mortgage;

development potential;

tax liability;

depreciation.

Courts may therefore appoint independent experts.

22. Co-Ownership and Inheritance

Inheritance is one of the most common sources of co-ownership.

Example:

A dies leaving:

spouse;

two children.

The property may pass to several heirs according to the applicable succession law.

Disputes may concern:

ownership percentages;

occupation by one heir;

sale of the property;

improvements;

rent;

debts;

partition.

European succession law can become especially important where the deceased lived in one country and owned property in another.

23. European Succession Regulation

The EU Succession Regulation (Regulation 650/2012) can determine applicable law and jurisdiction in many cross-border succession matters.

However, it does not create a single European property law.

Therefore:

Succession law determines who inherits

while

national property law determines many consequences concerning the property itself.

This distinction is important.

24. Matrimonial Co-Ownership

Co-ownership disputes can also arise following:

divorce;

separation;

death of a spouse;

division of matrimonial property.

Different European states use different matrimonial-property systems.

Questions include:

Is the property separate or matrimonial?

Who owns the property?

What contribution did each spouse make?

Which country's law applies?

Can one spouse sell the property?

EU matrimonial-property regulations can become relevant to cross-border cases.

25. Condominium Ownership

Apartment ownership creates a specialised form of co-ownership.

A person may own:

an individual apartment exclusively;

while simultaneously holding a share in:

stairs;

roof;

lifts;

foundations;

corridors;

gardens;

common facilities.

This produces disputes over:

service charges;

repairs;

building alterations;

common areas;

voting;

management;

maintenance.

26. Co-Ownership and Human Rights

Property disputes can sometimes engage Article 1 of Protocol No. 1 to the European Convention on Human Rights, which protects peaceful enjoyment of possessions.

However, the Convention does not guarantee an absolute right to keep property under every circumstance.

Property regulation may be lawful where:

it pursues a legitimate public interest;

it has a legal basis;

it maintains a fair balance between individual and public interests.

27. Important European Case Law

Case 1 — Sporrong and Lönnroth v Sweden

ECtHR, 23 September 1982

This is a foundational European property-rights case.

The European Court of Human Rights considered restrictions affecting property owners and developed the concept of a fair balance between public interest and protection of property.

Principle

Property rights protected by Article 1 of Protocol No. 1 can be subject to regulation, but interference must maintain a fair balance.

Relevance to co-ownership

Where state regulation affects jointly owned property, owners may invoke property-rights protections, although the ECHR does not itself determine ordinary civil-law rules concerning partition.

28. Case 2 — James and Others v United Kingdom

ECtHR, 21 February 1986

The case concerned legislation affecting property interests.

The Court recognised that states have a relatively broad margin to regulate property in the public interest, subject to proportionality and fair balance.

Principle

Property rights are protected, but they are not absolute.

Co-ownership relevance

National legislation concerning:

compulsory acquisition;

property regulation;

housing;

land use;

may interfere with property rights without necessarily violating the Convention.

29. Case 3 — Brumărescu v Romania

ECtHR, 28 October 1999

This major property case concerned the reversal of a final judicial decision concerning ownership.

The Court found a violation of property rights and the principle of legal certainty.

Principle

A final judicial determination of property rights cannot ordinarily be undermined arbitrarily.

Co-ownership relevance

Where co-ownership has been conclusively determined by a court, later arbitrary interference with the established ownership position may engage Article 1 of Protocol No. 1 and Article 6.

30. Case 4 — Beyeler v Italy

ECtHR, 5 January 2000

The Court considered state interference with property rights concerning a valuable painting.

The case is important for:

legitimate expectations;

proportionality;

legal certainty;

property protection.

Principle

Property interference must satisfy legal certainty and maintain a fair balance.

Relevance

In co-ownership disputes involving state intervention, expropriation or regulatory measures, these principles can become relevant.

31. Case 5 — Depalle v France

ECtHR, 29 March 2010

This case concerned property rights relating to a house located on the public maritime domain.

The Court examined the scope of state regulation and the owner's legitimate expectations.

Principle

The Convention does not guarantee that property arrangements remain permanently unchanged.

Co-ownership relevance

Owners may have to comply with legitimate public-law restrictions concerning:

land;

coastal areas;

planning;

environmental protection.

32. Case 6 — Öneryıldız v Turkey

ECtHR, 30 November 2004

The case concerned a dangerous waste site and the destruction of homes following an accident.

Although not a conventional private co-ownership case, it is important for property protection and state responsibility.

Principle

Article 1 of Protocol No. 1 protects possessions against serious interference, and state responsibilities can arise in dangerous situations.

Relevance

Where co-owned property is destroyed or seriously damaged because of dangerous public activity, Convention property protections may become relevant.

33. Case 7 — Gladysheva v Russia

ECtHR, 6 December 2011

The case concerned a person's property rights and the consequences of invalidity surrounding a property transaction.

The Court placed importance on:

legal certainty;

protection of property;

consequences imposed on an innocent property holder.

Relevance

This is useful for understanding disputes where competing ownership claims arise following transactions involving third parties.

34. Case 8 — Immobiliare Saffi v Italy

ECtHR, 28 July 1999

This case concerned property and enforcement of a possession-related judgment.

The Court examined the relationship between:

property rights;

access to court;

enforcement;

state regulation.

Co-ownership relevance

A co-owner's rights are not meaningful if a final judicial determination cannot be effectively enforced.

35. Important National Civil-Law Authorities

Because co-ownership is primarily governed by national property law, national civil-code jurisprudence is also extremely important.

For example:

Germany

German co-ownership law is governed principally by BGB §§741–758, including rules on:

Gemeinschaft nach Bruchteilen;

administration;

disposal;

partition.

France

French law regulates indivision, particularly under the Civil Code.

Italy

Italian Civil Code provisions regulate comunione, including management and division.

Spain

Spanish Civil Code provisions regulate comunidad de bienes, including rights of co-owners and division.

These national doctrines must be consulted when deciding a specific co-ownership dispute.

36. Germany — Co-Ownership

German law generally refers to Bruchteilsgemeinschaft.

Each person owns a fractional share.

Important principles include:

each co-owner can generally dispose of his share;

administration is regulated by statutory rules;

the common object itself cannot simply be disposed of by one co-owner;

partition can generally be sought;

judicial sale (Teilungsversteigerung) may be used where appropriate.

37. France — Indivision

French law uses the concept of indivision.

Each co-owner (indivisaire) holds a share.

French law addresses:

administration;

use;

expenses;

disposal;

partition.

A major principle is that no person should ordinarily be forced to remain indefinitely in indivision, subject to statutory and contractual limitations.

38. Italy — Comunione

Italian comunione similarly regulates shared ownership.

Issues include:

use of common property;

administration;

expenses;

improvement;

division.

Italian law generally recognises a right to request division, subject to applicable legal limitations.

39. Spain — Comunidad de Bienes

Spanish co-ownership law generally provides each co-owner with a share in the common property.

The system regulates:

use;

administration;

benefits;

expenses;

transfer of shares;

partition.

The Spanish Civil Code contains important provisions concerning termination and division of co-ownership.

40. Major Types of Co-Ownership Disputes

41. Co-Owner Excluding Another Co-Owner

Suppose A and B jointly own a house.

A changes the locks and prevents B from entering.

Possible legal consequences can include:

restoration of possession;

injunction;

compensation;

accounting;

occupation payment.

The exact remedy depends on national law and whether A had any lawful basis for exclusive occupation.

42. Occupation Compensation

A common formula is:

Reasonable rental value × excluded co-owner's share × relevant period

But this is only a conceptual model.

Courts may adjust the calculation for:

mortgage payments;

taxes;

maintenance;

agreements;

actual use;

consent;

necessary expenses.

43. Repairs Paid by One Co-Owner

Suppose:

A owns 60%;

B owns 40%;

roof repair costs €20,000.

If A pays the entire amount, A may seek contribution from B according to the applicable law.

A's claim could potentially be:

€20,000 × 40% = €8,000

But whether A can recover €8,000 depends on:

whether the repair was necessary;

whether prior consent was required;

whether A acted reasonably;

whether the expense benefited the property.

44. Sale of a Co-Ownership Share

A co-owner may often sell his or her fractional share without selling the entire property.

Example:

A owns 50%.

A sells the 50% share to C.

Now:

B = 50%;

C = 50%.

However, national law may provide:

pre-emption rights;

approval requirements;

restrictions on agricultural property;

family-home protections.

45. Mortgage and Co-Ownership

A co-owner may attempt to mortgage his or her share.

Important questions include:

Can the share itself be mortgaged?

Does the mortgage affect the entire property?

Can the creditor force a sale?

What happens after partition?

Do other co-owners have priority?

These questions are highly jurisdiction-specific.

46. Co-Ownership and Good Faith

Good faith can become important where:

one co-owner secretly leases the property;

one co-owner conceals rental income;

one co-owner makes improvements without consultation;

one co-owner sells property to a third party;

parties agree to a particular management arrangement.

The precise good-faith rules differ among European jurisdictions.

47. Cross-Border Co-Ownership

Consider:

A German citizen and a French citizen jointly own a holiday property in Spain.

A dispute occurs.

The court may need to distinguish:

Personal status

Which law governs the parties' personal relationship?

Succession

Which law governs inheritance?

Property

Which law governs rights in the Spanish property?

Procedure

Which court has jurisdiction?

Enforcement

How is the judgment enforced?

This is why lex rei sitae—the law connected with the location of immovable property—remains particularly important in European property disputes.

48. EU Private International Law

For cross-border co-ownership cases, potentially relevant instruments include:

Brussels I Recast — jurisdiction and recognition/enforcement;

Rome I Regulation — contractual obligations;

Rome II Regulation — non-contractual obligations;

Succession Regulation 650/2012 — cross-border succession;

Matrimonial Property Regulation 2016/1103;

Registered Partnership Property Regulation 2016/1104.

However, these instruments do not create a uniform substantive European co-ownership law.

49. Co-Ownership and Public Interest

States may regulate co-owned property through:

planning law;

environmental law;

heritage protection;

compulsory purchase;

housing law;

agricultural restrictions;

taxation.

Therefore, an owner cannot always argue:

"I own the property, so the state cannot regulate it."

European human-rights jurisprudence accepts significant property regulation where the requirements of legality and proportionality are satisfied.

50. Practical Litigation Procedure

A typical co-ownership dispute may involve:

Step 1 — Establish ownership

Obtain:

title deed;

land registry records;

inheritance documents;

purchase agreement.

Step 2 — Establish shares

Determine:

50/50;

60/40;

1/3 each;

another legally established proportion.

Step 3 — Identify the dispute

For example:

occupation;

expenses;

rent;

sale;

partition.

Step 4 — Examine agreements

Check:

co-ownership agreement;

inheritance agreement;

matrimonial agreement;

management agreement.

Step 5 — Determine applicable law

Particularly important in cross-border cases.

Step 6 — Attempt settlement

Possible solutions:

buy-out;

sale;

partition;

rental agreement;

management arrangement.

Step 7 — Court proceedings

Possible claims include:

partition;

injunction;

accounting;

reimbursement;

damages;

declaration of ownership.

51. Remedies

Depending on the jurisdiction, courts may grant:

1. Partition

Terminate the co-ownership.

2. Judicial sale

Sell the property and distribute proceeds.

3. Buy-out

One co-owner acquires the other's share.

4. Injunction

Prevent unauthorised use or disposal.

5. Accounting

Require disclosure of income and expenses.

6. Contribution

Require payment of a share of expenses.

7. Occupation compensation

Compensate an excluded co-owner.

8. Declaration of ownership

Determine the parties' legal shares.

52. Key Distinction: Co-Ownership vs Condominium

Co-ownership

Multiple persons own shares in the same property.

Condominium

A person may have:

exclusive ownership of an individual unit;

plus

an undivided share in common areas.

Therefore, condominium disputes involve both:

individual ownership

and

collective/common ownership.

53. Key Distinction: Co-Ownership vs Joint Ownership

Terminology differs between jurisdictions.

Generally:

Co-ownership in shares

Each person has an identifiable fractional share.

Joint ownership

The owners may hold rights collectively without the same type of immediately transferable fractional share.

The exact distinction must be determined under the applicable national law.

54. Six Cases to Memorise

For an examination answer, remember these six European authorities:

Sporrong and Lönnroth v Sweden (1982)
→ Property rights and fair balance.

James and Others v United Kingdom (1986)
→ Property regulation and public interest.

Brumărescu v Romania (1999)
→ Legal certainty and established property rights.

Beyeler v Italy (2000)
→ Legitimate expectations and property protection.

Depalle v France (2010)
→ Regulation of property and proportionality.

Immobiliare Saffi v Italy (1999)
→ Property rights, judicial protection and enforcement.

Additional useful authorities

Öneryıldız v Turkey (2004)
→ Protection of possessions in dangerous circumstances.

Gladysheva v Russia (2011)
→ Property transactions, legal certainty and protection of innocent owners.

Important: these ECtHR cases are primarily property-rights authorities, rather than cases establishing the ordinary private-law rules for partition or management of co-owned property. For an actual co-ownership dispute, the relevant national Civil Code and national court decisions remain decisive.

55. Exam Revision Formula

Remember:

Ownership Share → Possession → Management → Expenses → Income → Transfer → Partition → Remedies

If one co-owner uses the whole property:

Ask:

Was exclusive use authorised?

If one co-owner refuses to sell:

Ask:

Is partition available?

If one co-owner paid all expenses:

Ask:

Was the expense necessary and recoverable?

If one co-owner sells:

Ask:

Did they sell only their share or attempt to sell the entire property?

If the dispute is cross-border:

Ask:

Which law governs property, succession, matrimonial status and procedure?

56. Conclusion

Co-ownership disputes in Europe are primarily governed by national civil and property law, although EU private-international-law instruments and European human-rights principles can become important in cross-border cases.

The central principle is that each co-owner possesses legal rights in the common property while being required to respect the corresponding rights of the other co-owners.

The most frequent disputes concern:

use and possession;

exclusion;

rental income;

repairs;

improvements;

management;

transfer of shares;

mortgages;

inheritance;

valuation;

partition;

judicial sale.

The ECtHR cases of Sporrong and Lönnroth, James, Brumărescu, Beyeler, Depalle and Immobiliare Saffi provide important European principles concerning property protection, proportionality, legal certainty and effective judicial protection. For the substantive rules of co-ownership itself, however, the national civil code of the country where the property is situated will usually be the primary source.