Archive image used for illustration; it does not show an office or transaction belonging to the agencies mentioned.
Buying, selling and managing a rental are different assignments. An estate agency may help with more than one, but you need to know which service you are commissioning and whom it represents in the transaction. A promise of a quick sale does not replace a clear proposal.
This guide revises the former “best estate agencies” list and retains three examples, one per city, with information checked against official websites. Unsupported guarantees of returns, speed and financing have been removed. This is not a ranking of results or an assessment of transaction files.
Three agencies to start your comparison
Madrid: Mi Piso en Madrid
Its contact page lists Paseo de Recoletos, 5, 28004 Madrid, telephone +34 91 789 31 21, and asks visitors to make an appointment. Explain whether you want to sell, buy or arrange rental management. Request a proposal for that particular task and establish who your contact will be.
Valencia: Primer Grupo Gran Vía
The official page for Primer Grupo Gran Vía places this office at Calle Pintor Ricardo Verde, 5, ground floor, 46010 Valencia, telephone +34 96 336 01 53. It describes sales and rental services in areas including Mestalla and Exposició. This address belongs to that office, not every agency in the network.
Barcelona: Bcn Advisors
Its services page presents buyer support, sales and property valuation. It lists Ronda de la Universitat, 33, 3rd floor, 1st door B, 08007 Barcelona, telephone +34 93 180 02 72. Ask which parts of the process a proposal includes and how a buyer-search assignment differs from marketing a property for its owner.
Selling: ask for a plan you understand
Ask how the suggested price was calculated, which information supports it and how it would be reviewed if offers do not arrive. An asking price is a commercial proposal. Ask the agency to distinguish it from a completed transaction and avoid treating an estimate as a guarantee.
- Which photographs, advertisements and viewings are included?
- Who authorises price changes or new terms?
- How often will you receive an enquiry and viewing summary?
- Is the agreement exclusive, for how long, and how does it end?
- When do fees become payable, and which taxes are additional?
Compare more than percentages: compare the work, limits and extra costs in the written assignment.
Buying: check the property as well as the advertisement
Spain’s General Access Point for public administration recommends checking a property’s legal situation, including ownership and registered charges. It explains that information can be requested from the Land Registry through a nota simple, an information extract.
A viewing, floor plans and registry information answer different questions. Ask about any discrepancies and get professional advice before signing if you do not understand their implications. A reassuring sales conversation does not by itself resolve a question about rights or charges.
Before paying a reservation amount
Read the complete document: who receives the money, which property it concerns, what commitment is being made and which refund conditions apply. If you need financing, clarify how the document handles that situation. Do not assume a payment is refundable simply because it is called a “reservation”.
Confirm the recipient’s details through a known channel and retain the document and payment record. Seek independent legal advice to interpret particular clauses.
Can an agency guarantee a quick sale?
An agency’s forecasts and stated experience do not establish the outcome of your transaction. Ask for any commercial commitment in writing, and distinguish contractual conditions from an advertising phrase.
Information checked on 23 September 2026. Offices and services can change; check the official links before visiting. For help choosing someone to review a contract, see our guide to finding a lawyer.
