What it costs to renovate a flat in Sofia
Fitting out a new build runs €250–400 per square metre. A full renovation of an old flat runs more — and adds more.
Sofia is one of the few European capitals where renovation still reliably adds more value than it costs. Trades are competent and comparatively cheap, materials are EU-standard, and the discount on a tired flat is large. That combination is the strongest argument for buying older stock — provided you know what the work costs before you bid.
The shell-and-core trap
Most Sofia new builds are delivered as шпакловка и замазка: plastered walls, screed floors, wiring and plumbing brought into the flat, and nothing else. No kitchen, no bathroom fittings, often no internal doors and no flooring. Making one habitable costs:
| Standard | € per m² | 80 m² flat | What you get |
|---|---|---|---|
| Basic | €250–300 | €20,000–24,000 | Laminate, budget kitchen, standard sanitary ware |
| Mid | €300–400 | €24,000–32,000 | Better flooring, fitted kitchen, tiled bathroom, built-in wardrobes |
| High | €450–700 | €36,000–56,000 | Bespoke joinery, design input, premium finishes |
Add three to five months. Always compare a new-build price plus fit-out against a finished resale flat — the headline gap usually closes entirely.
Renovating older stock
A full renovation of a 1970s or 1980s flat — rewiring, plumbing, new bathroom and kitchen, floors, doors, windows — typically runs €350–550 per square metre, higher if you are moving non-structural walls or upgrading the electrical supply. On a 70 m² flat that is €25,000–38,000. Where the money goes, roughly:
- Bathroom and kitchen: 35–45% of the budget, and almost all of the disruption
- Electrics and plumbing: 15–20%, non-negotiable in anything pre-1990
- Floors, doors and decoration: 20–25%
- Windows: €250–500 per opening for quality double glazing
- Waste removal and unforeseen: 8–12%, and it will be used
What you can change in a panel block
This is where foreign buyers get caught. In a prefabricated panel building, most internal walls are structural and cannot be removed — the open-plan layout you are imagining may be physically impossible, and any structural alteration requires engineering approval that is rarely given. Brick and monolithic buildings are far more flexible. Before you buy on the strength of a floor plan you intend to change, get a structural opinion, not a builder's reassurance. Our panel versus brick guide explains the construction types.
Permissions and the neighbours
- Cosmetic work needs no permit. Changing the layout, the façade, the plumbing risers or anything structural does.
- Work affecting common parts — risers, façade, roof — needs the consent of the building's general assembly.
- Quiet hours are enforced socially and legally; a renovation that ignores them makes an enemy of the building for the whole of your ownership.
- Rubbish removal from a renovation is a real cost and a real obligation. Agree it in the contract.
Does it pay?
Usually, in Sofia, yes — the spread between a renovated and an unrenovated flat in the same building is typically wider than the cost of the work, which is not true in most Western European cities. The exceptions are over-specification for the neighbourhood (a €700/m² fit-out in a €2,538/m² area will not be recovered) and anything structural in a panel block. Buy the worst flat in a good building, not the best flat in a poor one.
Hiring trades
Get three written quotes with itemised materials, pay in stages against completed work, never pay a large deposit for materials up front, and expect to be present or to have somebody who is. A project manager costs 8–12% and is worth it if you are abroad. Ask every contractor for the address of a job they finished last year — the good ones offer before you ask.
Our verdict
How attractive renovation is as a strategy in Sofia, scored on cost, feasibility and whether the money comes back.
Frequently asked questions
How much does it cost to renovate an apartment in Sofia?
A full renovation of an older flat runs €350–550 per square metre — €25,000–38,000 on a 70 m² apartment. Fitting out a shell-and-core new build costs €250–400 per square metre.
Why are new Bulgarian apartments sold unfinished?
It is the market standard: developers deliver plastered walls and screed floors with services brought to the flat, leaving flooring, kitchen, bathroom and doors to the buyer. Always add the fit-out cost before comparing with a finished resale flat.
Can I remove walls in a panel block?
Usually not. Most internal walls in prefabricated panel buildings are structural, and structural alterations require engineering approval that is rarely granted. Brick and monolithic buildings are far more flexible.
Do I need a permit to renovate in Bulgaria?
Not for cosmetic work. Yes for structural changes, layout changes, plumbing risers and anything affecting the façade or common parts — and those also need the consent of the building’s general assembly.
How long does a renovation take?
Three to five months for a full renovation or a new-build fit-out, assuming decisions are made promptly. Materials with import lead times are the usual cause of delay.
Does renovating add value in Sofia?
Generally yes — the price gap between renovated and unrenovated flats in the same building typically exceeds the cost of the work. The exception is over-specifying for the neighbourhood.
Can I manage a renovation from abroad?
With a project manager at 8–12% of the budget, yes. Without one, expect delays, drift and disputes. Pay in stages against completed work.
What are the hidden costs?
Waste removal, electrical supply upgrades, replacing windows you had not budgeted for, and the 8–12% contingency that every honest quote includes and every optimistic buyer ignores.
Figures from our own sample of 18,058 Sofia for-sale listings and 6,176 long-let listings collected on 16 September 2026, and from OpenStreetMap. Asking prices, not achieved prices. Method.
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