Guide
How much does it cost to renovate a house in Porto?
There is no single number — but there are reliable bands. Below is how costs are actually structured in Porto, what pushes a project from one band to the next, and the lines that quotes routinely omit.
Cost bands per square metre
Cosmetic refresh
€350 – €650 / m²Paint, floor sanding, new kitchen and bathroom fittings, light electrical work. No layout or structural changes.
Full interior renovation
€800 – €1,400 / m²New layout, full electrical and plumbing, insulation, joinery, new kitchen and bathrooms. The most common scope in Porto apartments.
Deep rehabilitation
€1,400 – €2,200+ / m²Structural reinforcement, timber floor and roof replacement, facade works, lift or new openings, heritage-controlled details.
Ranges are indicative for construction works only, excluding VAT, fees and furniture. They reflect what I see quoted in and around Porto; a specific property can sit outside them.
What pushes the cost up
- Access. Narrow streets, no lift and no parking make every material movement slower and more expensive.
- Old timber structure. Floors and roofs often need reinforcement once opened up. This is the single biggest budget risk.
- Heritage constraints. Protected facades, windows and tiles must be repaired to specification, not replaced with the cheapest equivalent.
- Late decisions. Changing a bathroom layout after plumbing is installed costs several times what it costs on paper.
Budget lines most quotes omit
- Design and engineering fees — typically 8–12% of construction cost.
- Licensing, municipal fees and technical certifications (energy, gas, telecoms).
- Scaffolding, street occupation permits and waste removal in the historic centre.
- Provisional works: temporary shoring, protection of neighbouring properties.
- VAT — 6% applies to some rehabilitation works, 23% to others. Confirm before you sign.
- A 10–15% contingency. In old buildings this gets used, not saved.
Why comparing three quotes rarely works
Contractors price what is drawn. If the drawings and specifications are incomplete, each quote assumes something different and the cheapest is usually the one that assumed the least. A comparable tender needs a defined scope, a measured bill of quantities and the same exclusions across all bidders — that is work done before pricing, not after.
As an Owner's Representative I prepare that basis, run the comparison line by line and stay on site while the money is spent. See how the service works or read what to check before buying an old Porto building.