Living near a landfill: what to check before you buy

A landfill never shows up in a property listing, yet it is one of the few nuisances you notice from day one: odours that come and go with the wind, seagulls, the odd extra lorry. From now on, Hogarfax cross-checks each home's location against the official landfill map and tells you how far away the nearest one is. Not to hand you a verdict, but so you go and check it with the right questions.

What we have just added to the report

We have added a new indicator inside the "Surroundings and nuisances" block: proximity to waste landfills. We use the official Waste Landfills map from the SICA system, published by Spain's Ministry for the Ecological Transition (MITECO), which locates waste-disposal facilities nationwide. When a home has a landfill nearby, we flag it and tell you the distance to the closest one.

As with the rest of the surroundings checks, the result is graded by traffic light based on proximity: the closer the landfill, the higher the alert. It is not a measurement of the real impact, which depends on the type of landfill, the prevailing wind and the terrain.

Why we do it: what the evidence says about living near a landfill

A controlled, well-managed landfill is not the same as an uncontrolled dump, and Spanish law requires soil sealing, gas capture and leachate control (Royal Decree 1481/2001, updated by Royal Decree 646/2020, which transposes EU Directive 2018/850). That said, the scientific literature consistently documents that proximity to waste facilities is associated with nuisance and, in some cases, with health effects.

• Odours and gases. Waste decomposition produces landfill gas, 90–98% of which is methane and carbon dioxide, alongside hydrogen sulphide (the rotten-egg smell), ammonia and volatile organic compounds. These drive the most common complaints from people living nearby: odours, nausea and headaches during episodes.
• Health. Multisite cohort studies have found small but statistically significant associations between living within a few kilometres of a municipal landfill and certain respiratory effects, using hydrogen sulphide as an exposure proxy. Several reviews place the zone of possible influence at roughly 2–3 km, fading with distance.
• Leachate. The liquid produced by decomposition can carry heavy metals. In a properly sealed landfill it is captured and treated; the risk appears when the lining fails or the facility is old.
• Pests and traffic. Seagulls, rodents and insects are common around these sites, and the flow of lorries concentrates noise and dust along the access roads.

The impact on price: the market discounts what the listing hides

As with any other negative externality, the market tends to discount proximity to a landfill even when the buyer has not quantified it. Hedonic-price studies isolating this factor find reductions in market value estimated, depending on the area and distance, at roughly 3–4% in more modest areas and up to 5.5–7.3% in higher-value ones, with an effect that eases as distance grows and all but disappears several kilometres away.

What the map cannot tell you

A landfill point nearby does not tell you whether it is still active, what waste it handles or how well it does so. The only way to know is to visit the area at different times and on different days —the wind does not blow the same on a Tuesday at noon as on a Sunday at dawn— and to talk to the neighbours, who usually hold the most honest information there is about real odours and nuisance.

What Hogarfax does

We tell you whether there is an official waste landfill nearby and how far the closest one is, and we plot it on the map of the home's surroundings. It is a signal to go and look with the right questions, not a verdict on the house.