The cost of renovating a villa depends far more on scope, condition and logistics than on size. The main drivers are the state of the roof, façades and services, how much is being changed, the finishes chosen, structural or technical surprises, access and debris removal, whether the house is occupied, community and town hall requirements, and how decisions are made during the work. An itemised quote makes each of these visible.
Why is price per square metre misleading for villas?
In a standard apartment, a price per square metre can give a rough idea, because the building around it is shared and similar flats need similar work. A villa is a whole building. Two houses of the same floor area can differ completely: one with a sound roof, recent wiring and good windows, the other with a leaking terrace, original electrics and frames that no longer close. The second needs a different job, not just a more expensive version of the same one.
That is why we do not publish prices, and why we start with photos and the approximate built area for a first estimate, then visit before giving an itemised quote. Detailed explanations of cost factors across all types of renovation are on presupuestoreforma.eu.
Which factors move the cost most?
- Scope: interior only, envelope only, or both. Every additional trade adds coordination as well as work.
- Condition of the envelope: a roof that needs renewing or render that is hollow across whole elevations changes the job.
- Condition of the services: original wiring and pipework mean opening walls and floors throughout.
- Layout changes: moving kitchens and bathrooms moves drainage; removing load-bearing walls brings in a technician and structural work.
- Finishes: the same floor area can be covered with very different materials, and staircases and feature walls can be simple or elaborate.
- Surprises: older houses hide things, and some contingency is always wise.
- Access: steep plots, narrow streets, gated urbanisations and distance from the road affect deliveries and debris removal.
- Occupation: working around people living in the house takes more protection and sequencing.
- Rules: community consent, town hall requirements and technical documents can shape both the scope and the order of work.
- Decisions: a project where choices are made promptly runs more efficiently than one waiting on approvals.
Where do owners underestimate?
The most common gaps are the invisible items. Owners budget for a new kitchen and bathrooms but not for the rewiring that has to happen first, or for the roof repair that protects the new ceilings. Making good after window replacement, protecting floors and gardens, access equipment for façades and removal of debris also tend to be forgotten. None of these is optional, and a quote that leaves them out is not cheaper, only incomplete. Our article on what can go wrong renovating a house covers the surprises in more detail.
How can you control the cost without cutting corners?
- Fix the brief first. Decide what the house needs to do before choosing finishes.
- Do the envelope and services properly. Saving there usually costs more later.
- Phase sensibly. Each phase should leave the house sound and not require breaking out work done before.
- Choose finishes deliberately. Finishes are where budgets can flex without risk to the building.
- Keep the layout where it works. Moving wet rooms is costly; keeping them in place frees budget for quality.
- Decide promptly. Waiting on decisions slows trades and can add cost.
What should the quote show?
Every task on its own line, measured and described, grouped by trade, with materials marked as included or supplied by you, and exclusions listed. That makes each cost factor visible and lets you decide where to adjust. If one quote is much lower than others, check line by line what is missing. Our villa builder checklist lists the questions to ask, and our villa renovation page explains how we scope a whole-house job.
Does the time of year or the timetable matter?
It can. Exterior work such as roofs and façades is easier to plan in the drier months, and a tight deadline — for example a house that must be ready before a family arrives or a letting season starts — may mean more trades on site at once, more protection and less flexibility in sequence. A realistic timetable agreed before work starts is one of the cheapest ways to avoid extra cost. If your dates are fixed, tell us at the start so that the quote and the plan reflect them, rather than discovering halfway through that the scope does not fit the window.
Why do materials lead times matter?
Made-to-measure items such as windows, kitchens, stair cladding and some tiles take time to produce. If they are chosen late, trades wait or the sequence has to change, and both cost money. Choosing these items early, and ordering them at the right moment, keeps the job moving. When we handle materials purchasing, we plan orders around the sequence; if you supply items yourself, the quote notes when they need to be on site.
Bauman Raymond Attila · Reforma Villas Costa del Sol · Avenida Antonio Belón 3, Marbella. Last reviewed: 05/11/2026.
