No.15 by GuestHouse, Bath

No.15 Bath by GuestHouse is a quirky boutique spa hotel set in Georgian townhouses on Bath’s grand Great Pulteney Street. The subterranean spa reflects the hotel’s playfully modern yet elegant style, offering relaxation within a historic setting.

The spa occupies a calm basement level, featuring six treatment rooms including the signature Copper Room, a vaulted space with an oversized round copper bath for two, blending ritual and intimacy.

Treatments focus on mood-boosting therapies using vegan, organic, and sustainably sourced products. From customized facials and deep-tissue massages to shared couple rituals, each experience is thoughtfully curated and tailored to guests’ needs.

While there are no swimming pools, saunas, or steam rooms, the spa compensates with bespoke rituals like the Copper Bath Ritual and side-by-side massages that emphasize luxury, warmth, and sustainable details.

Ideal for spa-day visitors and hotel guests alike, The Spa at No.15 offers boutique wellness with thoughtful design, discreet charm, and luxurious treatment options in a central city environment.