Here are well-regarded boutique and small-luxury stays in and around Dambulla (Cultural Triangle). I’ve included what makes each special, rough price/comfort level, and how close they are to Dambulla/Sigiriya — check current availability and rates before booking.

1. Heritance Kandalama — luxury boutique resort (Geoffrey Bawa design)

• Why stay: Iconic eco-conscious property built into the rock/landscape, panoramic views over Kandalama reservoir, pool, spa and full-service facilities while retaining a boutique feel. Good for architecture lovers and for visiting Sigiriya/Dambulla.
• Level/price: 5-star / higher-end resort rates.
• Location: Kandalama (about 10–15 km from Dambulla town / close to Sigiriya). (en.wikipedia.org)

2. Diyabubula — art & jungle hideaway (small villa property)

• Why stay: Artist-designed intimate hideaway (a few villas) with a strong art/jungle vibe, secluded and peaceful — great for couples seeking privacy and a unique, creative setting.
• Level/price: Small luxury / boutique — mid-to-high range depending on season.
• Location: Near Dambulla / Kalundewa road in the Dambulla area. (en.wikipedia.org)

3. Wild Grass Nature Resort / Serene Jungle Retreats (boutique eco-lodges near Sigiriya)

• Why stay: Small family-run eco/boutique properties with private chalets, pools, breakfast and nature surroundings — popular with travellers to the Cultural Triangle who want quiet and local hospitality.
• Level/price: Budget–midrange boutique.
• Location: Sigiriya/Dambulla/Habarana area (short drive to Dambulla Cave Temple and Sigiriya). (Airbnb.com.mt)

4. Sundari / Sundari Boutique Rooms (small guesthouse / boutique rooms)

• Why stay: Popular small boutique rooms / family-run guesthouses with personalized service and pools — good value for travellers wanting boutique character without resort prices.
• Level/price: Budget–midrange.
• Location: Habarana / Dambulla area (easy access to key sites). (Airbnb.com.au)

5. Aloe Vera Guest House (well-reviewed small guesthouse)

• Why stay: Clean, well-reviewed small guesthouse with basic boutique comforts (AC rooms, breakfast, good guest ratings) — convenient base for Dambulla cave temple visits.
• Level/price: Budget boutique / guesthouse.
• Location: On Kandalama Road, Dambulla. (aloe-vera.srilankahotel.net)

6. Small villas and private boutique rentals (Airbnb/independent villas)

• Why stay: Many private villas and boutique guesthouses (private plunge pools, family villas, jungle settings) are listed in the Dambulla/Sigiriya area — flexible for groups or longer stays.
• Level/price: Wide range (budget to high-end).
• Location: Throughout Dambulla / Sigiriya / Habarana corridors. (Airbnb.com.mt)

7. Other heritage / manor-house style stays in the Central region

• Why stay: If you’d consider nearby Kandy or Matale areas, a few restored manor houses and small boutique properties (e.g., designer/heritage houses) provide an alternative for a boutique stay while touring the Cultural Triangle. (Search specific properties if you want options.) (en.wikipedia.org)

Quick tips

• Where to focus: Kandalama, Dambulla, Habarana and Sigiriya all sit close together — boutique stays in any of these will give easy access to Dambulla Cave Temple, Sigiriya Rock Fortress and the Cultural Triangle. (en.wikipedia.org)
• Book early in high season (Dec–Mar) for the smaller boutique properties — they have very limited rooms.
• Check recent guest reviews and confirm transfer options (some properties are remote). I can look up live availability, up-to-date rates, or make a short list targeted to your dates/budget — tell me travel dates and preferred style/price and I’ll pull current options and booking links.