Short answer: In Russian shared ownership, an indivisible improvement made at a co-owner’s own expense can be relevant to the size of that co-owner’s share only if the legally required procedure for using the common property was observed. Work carried out unilaterally does not automatically increase a share.
Which rule applies
Article 245 of the Civil Code regulates determination of shares in common shared ownership. The co-owners may agree on a method for determining and changing shares according to each participant’s contribution to the formation and increase of the common property.
The same article provides that a participant who, at their own expense and in compliance with the established procedure for using common property, makes improvements that cannot be separated without damage to the property, has a right to a corresponding increase in their share in the common property.
Why agreement and procedure matter
“Compliance with the established procedure” is a key limitation. In a shared-ownership situation, the scope of the work, consent, financing and the intended legal consequences should be recorded before irreversible work begins. A later disagreement about whether the work was approved, necessary or actually improved the property can make the outcome contested.
Article 247 separately provides that possession and use of common property are carried out by agreement of all participants, and where no agreement is reached, by a court procedure. The facts of each property and each improvement therefore matter.
Indivisible versus separable improvements
The Civil Code distinguishes improvements that can be separated from the common property without damage from those that cannot. Unless the co-owners agree otherwise, separable improvements belong to the participant who made them. The legal analysis for an indivisible improvement is different and should not be confused with the rules for a tenant’s improvements to leased property.
Evidence to preserve
- Agreement or written consent of the co-owners concerning the work and its intended effect.
- Project, permits or approvals where the work requires them.
- Contracts, invoices, payment records and handover documents.
- Photographs and expert material showing the condition before and after the work.
- Documents explaining why the improvement cannot be removed without damage.
Before changing a share
A change to a share is not a simple calculation of expenditure. The nature of the property, the legal regime of the co-ownership, the procedure followed, the evidence of the improvement and the co-owners’ agreement all need to be assessed. This page is general information and does not guarantee a change of share in any particular dispute.
Official sources
- Civil Code of the Russian Federation, Article 245 — determination of shares in common ownership
- Civil Code — general rules on common ownership
- Civil Code, Article 623 — improvements to leased property (separate legal regime)
Review the co-ownership documents first
For a review of the co-ownership arrangement and evidence of the work, request an initial consultation.