Updated 2026-06-22 · by Equipo Técnico
How to renovate an old swimming pool on the Costa Blanca 2026
Renovating an old pool on the Costa Blanca depends mostly on the condition of the shell and lining, whether the glass mosaic or porcelain tiles are lifting, any water loss, and the age of the filtration. Refreshing the surround adds to it: coping, non-slip deck and shade. Rather than replacing the whole pool, many are recovered by re-waterproofing and changing the finishes. The most useful next step is a personalised, no-obligation quote.
On the Costa Blanca most homes with a garden already have a pool, and many show their age: glass mosaic lifting off, water dropping below level, obsolete filtration or a slippery, dated deck. Renovating the existing pool raises property value and boosts holiday-rental appeal, almost always with less work and less time than starting from scratch.
What factors affect the renovation
- Condition of the shell and lining: lifting mosaic, detached porcelain or degraded paint.
- Water loss: leaks at joints, skimmers or pipework that mean opening up and re-waterproofing.
- New lining: glass mosaic, porcelain or microcement, which differ in lifespan and look.
- Age of the filtration: pump, filter and electrical panel that are worth upgrading.
- Surround: coping, non-slip deck, shade from a pergola or awning, and LED lighting.
Changing the lining: the upgrade that transforms most
Replacing old glass mosaic or degraded paint with porcelain or microcement is the single change that most transforms the look of a pool. Before re-lining, the shell must be prepared, cracks repaired and a fresh waterproofing layer applied, which is the key to ending water loss. Continuous microcement removes joints for a modern finish; porcelain offers maximum resistance to sun and chemicals.
- Glass mosaic: spot repairs, or a full change if many pieces are lifting.
- Porcelain: very resistant to sun and chlorine, ideal for intensive use.
- Microcement: a continuous joint-free finish that needs a well-waterproofed base.
Upgrading filtration and water treatment
- Replacing old pumps with variable-speed models, quieter and more efficient.
- Changing the filter and checking the electrical panel and plant-room pipework.
- Switching from chlorine to saltwater chlorination for softer water and less chemical handling.
- Automating the filtration to make year-round maintenance easier.
Waterproofing and surround
The waterproofing of the shell is what stops water loss and protects the structure; renewing it is essential when the pool drops level or damp appears around it. Using the works to renew the coping, lay a non-slip deck and add shade from a pergola or awning turns the pool into a comfortable living area all summer long.
Timescales and remote management
A finishes-and-filtration renovation is usually done in 2 to 4 weeks depending on scope, far less than rebuilding a whole pool. Drying times for the waterproofing and the new lining must be respected before filling, and cannot be rushed without harming the result. For overseas owners we agree a fixed price and send photo updates at each stage.
The real cost of renovating your pool depends on its condition, the lining you choose and the surround. We visit the home, assess the shell and the plant room and give you a personalised, no-obligation quote.