To bring a renovation quote closer to your budget, protect the work that is hard to redo later — services, waterproofing, levelling, structural repairs — and adjust what can be upgraded afterwards: some finishes, fittings, built-in furniture and lighting. Phasing rooms, keeping elements in good condition, choosing standard formats and supplying some materials yourself can all help. Ask for alternatives line by line rather than a lower total, and check how changes in materials affect the VAT position.
Why is cutting lines at random the most expensive way to save?
A renovation follows a sequence: services first, then masonry and plasterboard, then floors and tiling, then paint and fittings. Each layer covers the previous one. If you save on a lower layer, the cost of fixing it later includes removing and replacing everything on top of it.
That is why removing a line for new pipes to keep the tiles you wanted is usually a poor trade. The pipes are hidden behind those tiles; if they fail, the tiles come off. The opposite trade — keeping the new pipes and choosing a simpler tile — saves less today, but nothing has to be broken later. A good budget adjustment starts by sorting the lines into two groups: what is hard to redo and what is easy to upgrade.
What should you protect when the budget is tight?
- Plumbing and drainage in rooms being renovated.
- Electrics where the installation is old or the walls are open anyway, carried out by authorised partner installers.
- Waterproofing in showers, wet rooms and terraces.
- Levelling and substrate preparation under new floors and tiles.
- Repairs whose cause is known: damp, leaks, cracks diagnosed by a technician.
- Debris removal and protection, which keep the site safe and neighbours on side.
These lines rarely look exciting on paper, but they decide whether the renovation lasts. Our page on rewiring and plumbing cost explains why services are so hard to add later.
Which lines can usually be simplified safely?
- Tile format and material: a standard format laid straight instead of large-format or a complex pattern.
- Full-height tiling reduced to wet zones, with paint suitable for bathrooms elsewhere.
- Fittings and taps: a simpler range with the same connections, upgradeable later.
- Built-in furniture: wardrobes or shelving added in a later phase.
- Decorative ceilings: a flat ceiling instead of coves, with cabling left ready for later.
- Internal doors: refurbished instead of replaced, if frames are sound.
The trick is to prepare for the upgrade now — leave a cable, a box, a reinforced wall — so the later step does not involve breaking anything. Ask us to price both versions of a line so you can see the difference. The blog post on the best and worst ways to save gives more examples.
Can phasing the renovation help?
Yes, if the phases follow the logic of the building. A common approach is to renew all the services and do the wet rooms in the first phase, then floors and finishes in the living areas later. Another is to complete one floor of a house fully before starting the next.
Phasing has costs of its own: the site is set up twice, debris is removed twice, and some protection must be repeated. It also means living with work in progress or planning around rental seasons. It works best when the first phase covers everything that is hidden and messy, so the second phase is mostly finishes. Ask for a phased quote with both phases priced, so you can see the total cost of doing it in two steps. Read options when the budget falls short for the broader decision.
Should you buy some materials yourself?
It can help, especially for items where you have a strong preference or access to a good source: tiles, sanitaryware, taps, light fittings, kitchen units. The quote then changes those lines to “fit only”. But there are trade-offs. You become responsible for ordering the right quantity with a waste allowance, for delivery dates matching the schedule, and for any defect in the item itself.
There is also a tax angle. According to the Spanish Tax Agency (AEAT), one of the conditions for the reduced VAT rate on home renovation is that materials supplied by the contractor do not exceed 40 per cent of the taxable base. Supplying materials yourself changes that share. Check with your adviser before reorganising a quote around this — see VAT and grants.
How should you ask a builder to bring the price down?
Not by asking for a lower total. A builder asked simply to “do better on price” has three options: work for less, use cheaper materials without telling you, or quietly reduce the scope. None of them is what you want.
Instead, mark the lines you are willing to change and ask for alternatives: a different tile, a simpler ceiling, keeping the existing kitchen units, moving a room to a later phase. Ask what each change saves and what it means in practice. That conversation keeps the quality decisions with you and keeps the quote honest. We are happy to price alternatives on any line. Our cost factors page helps you see which factors you can influence.
What should you not compromise on?
Beyond the hidden work already mentioned, a few things are worth protecting whatever the budget. A written, itemised quote and contract. Invoices for every payment. Installers who are authorised for electrics and gas — in our jobs, partner installers we coordinate. A contractor who works with a guarantee and public liability insurance. A clear procedure for changes.
None of these adds much to the cost, and all of them protect you if something goes wrong. Saving by paying without an invoice, or by using an unauthorised electrician, can cost far more later. For a full checklist, see the checklist for a good quote, and for kitchen-specific options, kitchen renovation cost.
Official sources
Bauman Raymond Attila · Presupuesto Reforma · Avenida Antonio Belón 3, Marbella. Last reviewed: 05/11/2026.
