Here are highly recommended luxury boutique hotels across Sri Lanka (selected for design, location, service and guest/critic praise). I’ve grouped them by region with a short note on what makes each special and one or two sources you can use to check rates, availability and current reviews.

South coast / Galle & nearby

• Amangalla (Galle Fort) — historic, colonial-era suites inside Galle Fort with a calm, heritage atmosphere and personalized service. (explorehiddensrilanka.com)
• The Fort Bazaar (Galle Fort) — stylish, contemporary boutique stay in a restored merchant’s house with a lively restaurant and courtyard pool. (thetimes.co.uk)
• Kahanda Kanda (near Galle) — intimate hillside manor with contemporary-Bawa-inspired architecture, private villas and dramatic tea-country views. (traveldua.co.uk)

Bentota / West coast

• Saman Villas (Bentota) — one of Sri Lanka’s original boutique properties, intimate ocean-facing villas with exceptional privacy and service. (en.wikipedia.org)

Southern coast / Koggala

• The Fortress Resort & Spa (Koggala) — boutique-luxury resort with modern design, strong food program and beachfront access. Good for combining style with resort facilities. (en.wikipedia.org)

Cultural Triangle / Sigiriya & Dambulla

• Jetwing Vil Uyana (near Sigiriya) — acclaimed eco-boutique lodge set in wetlands/paddy habitats with an emphasis on conservation and unique stilted villas. Frequently praised for its setting and sustainability. (en.wikipedia.org)
• Diyabubula (near Dambulla) — tiny artist-designed hideaway (just a few villas) set around a water-garden — ideal for art lovers and quiet escapes. (en.wikipedia.org)

Hill country / Kandy & Ella area

• The Kandy House (near Kandy) — restored 200-year-old manor turned into an intimate nine-room luxury house with antiques, gardens and a very private atmosphere. Often cited as one of the best small hotels in Sri Lanka. (en.wikipedia.org)
• Amanwella / Cape Weligama / Kahanda Kanda alternatives — (if you want very high‑end, design-led beachfront villas and private-pool suites, properties such as Cape Weligama and Amanwella are frequently listed among Sri Lanka’s top luxury small hotels; check current availability/pricing). (traveldua.co.uk)

Colombo (city boutique-luxury)

• Galle Face / Colombo boutique options and heritage houses — for a boutique stay in the capital consider small design hotels and heritage houses in Colombo 7 and the Fort area (many guides list boutique choices and rooftop/restaurant highlights; check current listings and reviews for the latest openings). (thetimes.co.uk)

Notes and suggestions

• Which is “best” depends on your itinerary: choose Galle/Fort for history and coastal charm; Bentota/Cape Weligama/Amanwella for beach and villa privacy; Kandy or the hill country for heritage and cooler climate; Sigiriya/Dambulla for culture and nature. (en.wikipedia.org)
• Rates and availability change seasonally (high season generally Dec–Mar on the southwest coast; monsoon windows differ by region). For specific dates, rates and to confirm facilities (private pools, airport transfers, AYURVEDA or spa offerings), check the hotel websites or recent reviews on booking sites. (en.wikipedia.org)

If you’d like, I can:

• Narrow this to the top 5 for a specific region (e.g., Galle, Bentota, or hill country), or
• Check up-to-date rates/availability for specific dates (I can look up current prices and links).