Buying a flat looks simpler than buying a house. Fewer square metres, thinner paperwork, and the land is not your problem. Which is exactly why the question that ought to come first rarely gets asked: what precisely becomes yours when you sign.
The answer is not only the flat. Specific things outside it become yours too, plus a share in everything else in the building. Those three layers decide what you pay, what you get to decide, and what you are allowed to do.
The unit, the common parts, and the ownership share
Croatian condominium ownership consists of two things that cannot be separated.
- The unit is the flat itself, the space only you use. You own it outright.
- The common parts are the roof, façade, foundations, load-bearing walls, stairs, services, and the land under and around the building. Nobody owns those alone; all the co-owners hold them together, each to the extent of their share.
That share is recorded as a fraction, for example 85/424. Here is where the common misunderstanding sits: it is not your flat’s area divided by the building’s. The share is derived from the useful value, calculated by multiplying every space by a coefficient reflecting how usable it is. So a flat with a large terrace and a basement store can carry a bigger share than a neighbouring flat with more enclosed floor area.
In practice the share sets three things: your portion of the common costs, the weight of your vote on decisions about the building, and your part of the common areas. The coefficients are the same ones covered in the guide to usable and gross floor area, so the two are worth reading together.
Appurtenances: what belongs to the flat but is not in it
A flat almost always comes with spaces that are not inside it: a basement store, a parking space, a garden, a covered terrace. In the condominium study these are recorded as appurtenant parts, and they belong legally to your unit even though they sit elsewhere in or around the building.
Two things about them are worth knowing in advance.
- They count towards the share, with a coefficient. A basement store typically enters at around 0.50, an open terrace lower, enclosed living space at 1.00. That is why two flats of identical size can hold different shares.
- The registered use governs, not the current one. This is the most important sentence here. If a space is recorded in the study and the occupancy permit as storage, it is storage, however nicely it is fitted out and whoever is living in it. Converting it to residential use is a separate administrative procedure with its own conditions and cost, and it is not guaranteed.
When a listing describes a basement space as an extra apartment or a separate letting unit, ask for the document that says so. If there is none, you are not buying a second unit but a store room, and the price has to reflect that.
The condominium study: what to look for
The study is the document that divides a building into units. It is not a formality; it is the only inventory of what you are buying.
- The table for your unit, with gross area, coefficient and net usable area for each space.
- The list of appurtenances: which store, which parking space, which part of the garden.
- Your ownership share, as a fraction.
- Whether all of it matches what is on the ground and what you were shown.
Ask for the building’s occupancy permit too, and check that it is final. The study says how the building is divided; the occupancy permit says whether it may be used at all.
The reserve fund and the building manager
A building with several units has a shared purse and someone running it. For a foreign buyer this is often the biggest surprise, because a house carries no such cost.
The reserve fund
The reserve fund pays for repairs and maintenance of the common parts: roof, façade, lift, services. It is paid monthly, each co-owner contributing in proportion to their share. There is a statutory minimum tied to the building’s value, but each building sets its own actual figure and they differ. Ask what it is for that specific unit and how much is currently in the fund, because an empty fund means the first major repair arrives as an extraordinary levy.
The co-owners’ agreement
The co-owners sign an agreement setting out how the building is run and appointing a manager. The manager holds the fund, contracts the works and reports. Ask to see both the agreement and the most recent report: together they show whether the building is properly run or whether decisions simply never get made.
When the pool is shared
A shared pool, roof terrace or garden looks well in a listing and is a real cost in practice. Maintenance, water, chemicals and servicing come out of the shared purse, which means out of your share, whether or not you use them. In a small building of a few flats that cost is divided among few people, so per unit it is higher than in a large block.
What it means if you are not here
- You can be outvoted. Decisions about common works are taken by share. If the other co-owners want the façade redone, you help fund it.
- Check for arrears before signing. Ask the manager whether there are unpaid reserve-fund obligations on that unit and how they are settled on a sale. Get the answer from the lawyer handling your purchase, not from the seller and not from us.
- Someone has to be reachable. Breakdowns, meter readings, co-owners’ meetings. If you are rarely here, that is a role somebody takes on, usually for a fee.
Flat or house on the coast
Neither is objectively better, but the differences are predictable.
- A flat: a lower entry price, less maintenance falling on you, shared facilities you would not build yourself. In return you pay into the fund, share the decisions, and find it harder to change anything held in common.
- A house: every decision is yours, and so is every cost. The roof is your problem and your deadline.
For letting the difference is just as real: a front-row flat with parking often fills better than a larger house up the slope, and needs less managing. How that arithmetic works is set out in the guide to holiday letting returns.
What to ask for before making an offer
- The condominium study, with your unit’s table and the list of appurtenances
- The building’s occupancy permit, and whether it is final
- The land registry extract for the unit, checking encumbrances
- The co-owners’ agreement and the name of the manager
- The reserve fund contribution, the fund balance, and whether there are arrears
- The registered use of every space being sold to you as added value
- The energy certificate
Next step
If you are looking at a particular flat, send it to us and say what in the listing is unclear. We will check what the study actually says and tell you where description and document diverge, including when that means the property is worth less than the asking price. The costs of the purchase itself are set out in the guide to purchase costs, and the current portfolio is under properties for sale.
About the author
Sottomonte
Real estate agent
Lives and works on Pelješac. Handles sales, from stone houses for renovation to building land by the sea. Checks the land register, cadastre and permits personally before any offer goes out.

