Family house renovation in Prague

As a guide, CZK 12,000 – 20,000 per m² for interior modernisation with the services left alone, CZK 22,000 – 35,000 per m² for a full interior renovation including new services, and CZK 35,000 – 55,000 per m² for an older house where windows and facade insulation are included. For a 150 m² house that means roughly two million crowns and up. These are Prague market bands for 2026; the final price follows the survey.

For a house of around 150 m² with a complete interior renovation including services, allow five to seven months from contract signature to handover. Of that, 2–3 weeks go on survey and budget, 3–12 weeks on design, consents and procurement, and the rest on the works. A partial modernisation takes six to ten weeks.

Some of it, yes. Working floor by floor, and phasing bathrooms, flooring, finishes, window replacement and facade insulation all work well. Splitting the electrical, water and waste installations does not — they are done in one go, otherwise the same structures get opened up twice. Phased work typically costs around a tenth more overall because site set-up and protection are repeated.

Maintenance and alterations that do not change the external appearance, do not touch load-bearing structures and do not change the use of the building generally do not require a permit. An extension, an additional storey, an opening in a load-bearing wall, or a change of appearance in a conservation area does. In those cases the documentation is produced by an authorised designer and we prepare and run the process with the building authority on your behalf.

On an uninsulated house from the 1960s to 1980s, usually yes. Heating costs drop noticeably and the heating system can then be sized smaller, which also reduces the cost of installing a heat pump. Allow CZK 2,500 – 4,500 per m² of facade. If the house is already insulated, the money is better spent on windows, the roof and the heat source.

Ideally both in one phase. Windows should be set so the frame lines up with the future insulation layer; otherwise you get a cold bridge at the reveal and condensation around the openings. If they genuinely cannot be done together, do the windows first and the insulation within one or at most two years.

Not during a full renovation with new services — there is no water or power and the dust from strip-out reaches everywhere. During partial or phased works it is possible if the occupied part can be separated from the works and one bathroom stays in use. We settle this at survey stage and reflect it in the programme.

Typical signs are staining and blown plaster up to about a metre above floor level, white salt efflorescence, and a musty smell in the cellar. Before anything is priced, a trial pit is dug at the foundation. Remediation may mean cutting in a damp-proof course, injection, a ventilated lining or drainage, and costs run from tens into the low hundreds of thousands of crowns depending on extent. Cutting into load-bearing masonry is arranged through licensed contractors working to an authorised designer's proposal. Replastering over damp buys you about two years.

Yes, but not in-house. The design documentation and structural assessment are produced by an authorised designer, and the construction work is carried out by vetted licensed contractors. We prepare the package, contract it, coordinate it on site and answer to you for how the job runs. We will never tell you a load-bearing wall can be propped without a structural engineer.