InmoBuyer turns Spanish property market data into clear guidance for buying at the right price: a reference value, its range, a reliability level and, depending on your plan, a negotiation margin and a maximum purchase price.
A portal shows what sellers are asking. InmoBuyer puts each listing in context: what comparable homes in the same neighbourhood are asking, and what actually sells there.
The property is compared with similar homes in its reference area. When the area has too few, the analysis widens step by step, and says so.
Size, condition, floor, lift, terrace, pool, parking, garden, views: each feature is valued according to what it is worth in the local market, taking into account how rare it is in the area.
Asking prices are checked against official sales statistics. The gap between what is asked and what sells is measured area by area, and taken into account in our reference values.
A listing is rarely complete. Missing information is estimated with a documented statistical method, and the uncertainty it adds is taken into account in the range shown. It is never hidden.
Every analysis shows its reliability level. When the data is not enough, InmoBuyer says so, instead of producing artificial precision.
Market data and references are updated regularly, and sale values are updated using official public indices.
The same rigour, from a first look at a neighbourhood to the numbers behind an investment.
A free, public reading of the market, area by area and by property type, to get a feel for a neighbourhood before choosing a listing.
The asking price is set against comparable listings in the same neighbourhood, corrected for the gap measured with real sales. The analysis then guides you at every step: first contact with the seller, viewing, reassessment, total cost of the purchase, negotiation margin and offer.
The analysis starts from the sales actually recorded in the area, updated with an official public index. It prices the renovation according to the property's condition, calculates, on the assumptions chosen, the maximum purchase price consistent with your target margin and tests it against several negotiation scenarios. The scanner spots listings priced below the estimated reference value.
Place the property in its reference area, using its address and the listing data.
Build a reference from recent comparable homes of the same type in the same area.
Value the property's features according to the local market, and estimate any missing information.
Measure the gap between asking prices and recorded sales, and take it into account in the reference value.
Calculate the indicative range from the number of references and their spread, and show it.
A reference value and its range, a reliability rating, a price positioning rating and, depending on the plan, the negotiation margin and the maximum purchase price.
Every value comes with a likely range and a reliability rating. The rating reflects the expected error, based on the number of comparable references and their spread. It never turns an area with little data into a certain estimate.
Why our reference values can sit below asking prices.
In many areas, the prices shown on portals are higher than the sale prices actually recorded. This gap, the market fog, varies widely from one neighbourhood to another. InmoBuyer measures it from official sales statistics, comparing properties of the same type.
When an area's gap goes beyond what is usually observed, we remove the excess from our reference values, in the same way on every screen. The listing's position against the market shown does not change: you negotiate on a realistic basis, knowing where the seller is starting from.
InmoBuyer suggests an indicative negotiation margin, based on the gap between asking prices and real sales in the area, and on the property's own situation. It helps you prepare the viewing and the offer, without guaranteeing the seller will agree.
A figure that combines the asking price, the comparable-homes reference and recorded sales, to set a plausible range for discussion.
It is not a valuation, nor a certified appraisal, nor a prediction of the price the seller will accept. It is not the actual sale price of this property.
Available depending on your plan.
Viewing observations are organised in four parts, then turned into an indicative adjustment of the reference value, capped in line with professional residential valuation practice.
Each defect is classified: common in the area, and therefore already included in reference prices, or specific to the property. Only what is specific to the property changes the value. A legal alert triggers a separate warning, with no automatic adjustment.
The reassessment brings together the initial analysis, the viewing, the documents and, where relevant, the renovation estimate. It produces an adjusted value and a list of points of attention ranked by priority, each with its recommendation.
The viewing adjustment is indicative. It gives a factual basis for preparing an offer or asking for a further expert assessment, and is not a certified valuation.
An item-by-item costing, based on estimated measurements and a price schedule per finish level. An order of magnitude to decide, never a contractor quote.
Wall and ceiling areas, perimeters, numbers of doors and windows are estimated from the built area and the number of rooms. What these figures cannot tell (shower size, tiled walls, kitchen area, island) is asked of you. A site visit to check the measurements is still needed for a reliable result.
Each item (floors, paint, kitchen, bathroom, electrics, windows and doors…) is priced at several finish levels, with labour and materials shown separately, and adjusted to local building costs where the data exists. You can replace any price with one from a quote you have received.
A contingency reserve is added to the total. VAT follows the Spanish rules that apply to renovating a home.
Public construction price databases, prices gathered from tradespeople and contractor platforms, manufacturer and distributor price lists, and feedback from real projects. Prices are cross-checked, validated by our team and reviewed regularly.
The price schedule evolves: our team adapts it when market prices change.
Our listing-market databases do not carry the fields meant for personal information: no person's name, no contact details. The list below describes what we process.
Listing reference, portal address, asking price, publication status and collection date. Nothing that identifies who published it.
Type and sub-type, surface, bedrooms, bathrooms, floor, lift, exterior aspect, terrace, pool, parking, garden, condition, year built, and the description text — read only to detect anomalies such as a mistyped surface.
Province, municipality, district and neighbourhood, plus the coordinates published in the listing. The sales statistics we use are aggregated public data, never an individual transaction.
The advertiser's status: private seller or professional. That is a category, never a person. For a professional listing, the trade name published by the portal is kept.
No person's name, no telephone number, no email address, no contact form. These fields are stripped before storage, and the same applies to a listing you import yourself. Such details may nonetheless remain in the free text written by the advertiser: we work to remove them, without being able to guarantee that none persists.
InmoBuyer is a pre-offer decision tool. It does not replace professional expertise, a technical inspection, legal advice, or a bank appraisal. A prudent buyer uses the services of competent professionals: an online service cannot offer the same level of assurance as a specialised professional service.
The actual condition of the property, nuisances, charges, works, and legal situations must be verified by the buyer and qualified professionals.
InmoBuyer does not replace a certified appraisal or expert report required for financing. It provides pre-offer decision signals.
The margin signal is built from aggregated zone data. It does not reveal the exact price of an individual transaction nor the future sale price of the analysed property.
Reliability drops sharply for properties whose exceptional character adds factors that cannot be modelled automatically: historic or architectural value, extreme luxury, castles, manor houses, religious buildings, converted mills or boats. For these properties, a professional opinion is essential.
Our quality controls, reliability levels and rules for geographical delineation draw on the principles of the international frameworks for property valuation and automated valuation models. Citing them does not imply certification or endorsement of the tool by those bodies.
Principles for controlling dispersion and quality in residential mass appraisal.
Transparency, sample sizes and governance of automated valuation models.
Reading forecast error, and quality control requirements for automated valuation models.
Research on drawing market boundaries, to avoid comparing areas that are not alike.
Address search: CartoCiudad street referential © Instituto Geográfico Nacional (IGN) / CNIG, under a CC-BY 4.0 compatible licence.