Escollera rock walls in Mijas

MURES builds escollera walls in Mijas. We are a Málaga company specialising in natural stone retaining walls, excavation and earthworks. We take care of everything: site visit, fixed written quote, stone supply, excavation, placement with an excavator and drainage. It is a very common job in Mijas because of its hillside villas and plots between the mountains and the coast.

Before hiring anyone for escollera walls in Mijas, check four things: that you get a fixed quote in writing, that it states the size of stone they will use (in kilos per block), that it includes drainage behind the wall (drain pipe, gravel and geotextile), and that they have their own or trusted machinery to place the blocks one by one. Ask for photos of similar jobs and who will handle the permits. Be wary of very low prices with no drainage or foundations.

As a guide, between €70 and €120 per m² of visible wall face. A wall 20 m long and 2 m high (40 m²) would cost between €2,800 and €4,800. In Mijas the price goes up if access within the urbanisation is difficult or a lot of soil has to be removed. We give you an exact written quote after the visit, with no obligation.

We quote escollera walls per m² of visible wall face (€70–120/m²), because it is the easiest figure for a homeowner to compare. If you prefer, we can break down the cubic metres of stone and the tonnage in the quote. For reference, public construction price databases put a placed limestone escollera wall at around €100–115/m³. The final price of escollera walls in Mijas depends mainly on the height and the access.

An escollera wall is a retaining wall made from large blocks of natural stone (usually 300 to 2,000 kg) placed one by one with machinery, without mortar. It is used to hold back soil on slopes, create terraces, stabilise embankments, protect tracks and reinforce stream banks. It stands up by its own weight and the way the blocks lock together, and water drains through the gaps between the stones.

Pros: it is very durable, free-draining (no water pressure builds up), copes with small ground movements without cracking, blends into the landscape and is usually quicker and cheaper than a reinforced concrete wall of the same height. Cons: it takes up more space at the base, needs access for a lorry and an excavator, and is not the best choice for very thin, vertical walls in tight urban spaces.

Hard quarry rock is used, usually limestone or granite, in irregular blocks. In Málaga, limestone is the norm, in light grey or beige. Block size depends on the height: for walls up to 1.5 m, blocks of 300 to 800 kg; from 1.5 to 3 m, 800 to 2,000 kg; and above that, larger blocks with a technical calculation. Our quotes always state the weight of stone we will use.

For walls on plots and country properties up to 2–3 m high, sizing is based on practical criteria: a base wider than the top, a lean back into the slope and blocks of the right weight. Above 3 m, or if the wall supports a house or a road, a technical stability calculation is needed. A widely used reference in Spain is the Ministry of Transport’s guide to the design and construction of escollera walls for road works. On very steep plots in Mijas, two terraces often work better than one very high wall.

A trench is dug below natural ground level (usually 0.5 to 1 m, depending on the height of the wall and the type of soil) and the first row of the largest blocks is set in it, leaning slightly back into the slope. On soft ground or next to streams we dig deeper or bed the base in concrete. Good foundations are what stop the wall being undermined by heavy rain.

Usually, yes. For escollera walls in Mijas you normally apply for a building licence or submit a declaración responsable to the town hall, depending on the size of the wall and whether the land is urban or rural. If the wall is less than 100 m from a stream or river (zona de policía), you also need authorisation from the Junta de Andalucía’s water authority. We’ll advise you on what to apply for before work starts.

A typical escollera wall on a plot in Mijas, 15 to 30 m long and about 2 m high, takes around 3 to 8 working days: digging the foundations, placing the blocks, drainage and backfill. It takes longer if it rains, if access is difficult (narrow urbanisation streets) or if we have to wait for permits. Our quote includes an estimated date.

Very little. Once a year, especially after heavy rain, check that the drain outlet isn’t blocked, that no blocks at the base have moved and that run-off isn’t pouring straight onto the top of the wall. Plants growing between the stones are rarely a problem, except for the roots of large trees near the base. A well-built wall can last for decades without any work.

Yes, it is one of the most common jobs on hillside villas in Mijas. The escollera wall holds back the ground and creates the level platform, and the pool is built with its own concrete structure, without bearing on the blocks. The key is to leave enough distance between the pool and the edge of the wall, plus good drainage. At the site visit we look at the space and suggest the best layout.