This is the default answer for most people searching this phrase, and the review volume is the reason: it outweighs the other four adults-only properties on this page combined. A score built on that much testing has been through several seasons rather than sampled in one.

What the label buys you here is a crowd of adults, not silence. The hotel runs a beach club and a rooftop bar, and both feature heavily in the reviews. For the terrace itself rather than the room, see the Marbella rooftop bars guide.

La Fonda occupies three restored 16th-century buildings on Plaza del Santo Cristo and is the first Relais & Châteaux property in Andalusia. The restoration uncovered the altar of the 16th-century Hermitage of San Sebastián along with original murals and frescoes, which is a genuinely unusual thing to sleep above.

No hotel on this page rates higher with guests, and it does it on a genuinely well-tested review base. The adults-only flag suits the building rather than being a marketing decision: this is a small heritage property with courtyards and staircases, not a resort with a children's pool it has chosen to close. Its place among the other historic addresses is covered in the Marbella Old Town boutique hotels guide.

Guests rate The Town House's location near the top of Booking's scale, well above its already strong overall score, and that gap is the single most useful thing on its listing. In a town where the difference between a good and a bad evening is a short walk versus a taxi each way, an address beats an amenity list.

The property is small and the review base reflects that. Expect a townhouse rather than a hotel: stairs, a terrace, a handful of rooms, and no facilities to speak of. Guests who want a pool are on the wrong page.

Nobu is the only hotel here that states an age: 16 and over, applied across the hotel including the pool and the restaurant. That is lower than the 18+ that most guides assert, so a family with a 16-year-old has an option here that the other properties may not offer.

The complication is that its Booking.com listing has described the hotel as accepting children of all ages, with over-12s charged at the adult rate. Both versions are in circulation. Treat 16+ as the operating policy and get it confirmed on the booking if anyone in your party is close to that line. On everything other than age, the hotel is covered in the five-star hotels guide.

The Oasis is the adults-only wing of the larger Don Carlos resort at Elviria, and the thing to know before booking is the geography: it is roughly 20 minutes from central Marbella, not a walk from the Old Town. The seclusion is real and so is the taxi fare.

It also carries the thinnest review base here, well below Amàre. That is not a criticism of the hotel; it means the score is a smaller sample and worth reading through rather than trusting at a glance. The wider Don Carlos complex, which is not adults-only, appears in the Marbella family hotels guide.