Sustainable & green accommodation: IMPT lists eco-friendly hotels, green-certified stays, sustainable guesthouses, and responsible travel options — from carbon-neutral hotels and eco lodges to environmentally friendly B&Bs and net-zero accommodation. Every booking removes 1 tonne of verified CO₂ at the lowest price guarantee — same as Booking.com or better.
🌍 Your Carbon Impact at This Hotel
An average hotel night produces roughly 35 kg of CO₂ — from air conditioning, laundry, lighting, and food. When you book The Sumner through IMPT, we retire 1,000 kg of UN-verified carbon removal credits. That's not carbon-neutral. That's carbon-negative.
How it works: IMPT funds the carbon removal from its booking commission — you pay €0 extra. Credits come from UN-verified regenerative agriculture projects, tokenised on Ethereum, with a public retire code anyone can verify. No double-counting. No greenwashing.
🏘️ The Neighbourhood
The Sumner is located in london, united-kingdom. The surrounding area offers local dining, shopping, and attractions within walking distance.
⭐ What Guests Say
The Sumner is rated 10/10 (Exceptional) based on 335 verified guest reviews.
🏨 Amenities
💰 Price Guide
Rooms at The Sumner start from approximately £150/night for a standard double. Booking through IMPT matches Booking.com prices — and new members get a €5 signup credit on their first booking.
Tip: Book through IMPT to save up to 10% vs Booking.com, get a €5 signup credit, and automatically retire 1 tonne of CO₂ — all at no extra cost.
📍 Location
{'street': '54 Upper Berkeley Street', 'city': 'London', 'region': '', 'postal_code': '', 'country': 'United Kingdom'}
❓ Frequently Asked Questions
How much does The Sumner cost per night?
Rooms at The Sumner start from approximately £150/night. Booking through IMPT matches Booking.com prices — new members also receive a €5 signup credit.
Is The Sumner worth the price?
At 10/10 from 335 verified reviews, The Sumner is rated Exceptional. At £150/night for a 4-star london hotel, it offers solid value — especially with IMPT's 10% discount.
What is the carbon impact of staying at The Sumner?
An average hotel night produces ~35 kg of CO₂. When you book The Sumner through IMPT, 1,000 kg (1 tonne) of UN-verified carbon credits are retired — 28× what your stay produces. This costs you nothing; IMPT funds it from its commission.
Is booking through IMPT more expensive than Booking.com?
No — IMPT rates are consistently up to 10% cheaper for the same room. Plus a €5 signup credit for new customers and a best-rate guarantee.
Is free cancellation available at The Sumner?
Yes, most rates include free cancellation, typically up to 48 hours before check-in. The full policy is shown before you confirm.
What are the check-in and check-out times at The Sumner?
Check-in is from 15:00 and check-out is by 11:00. Early check-in and late check-out can be requested, subject to availability.
What neighbourhood is The Sumner in?
The Sumner is located in london. The surrounding area offers a mix of local restaurants, shops, and attractions. See the Neighbourhood section above for specific distances and walking times.
How does IMPT's carbon removal work?
IMPT funds UN-verified carbon removal from its booking commission — regenerative agriculture projects, tokenised on Ethereum with public verification. No double-counting, no greenwashing. You pay the same (or less); the planet benefits.
Is The Sumner an eco-friendly hotel?
When booked through IMPT, The Sumner becomes carbon-negative — 1 tonne of CO₂ is retired per booking, which is 28× more than an average hotel night produces. IMPT makes any hotel a green choice without changing the price.
What is the best time to visit london?
Prices and availability vary by season. Check IMPT for the latest rates at The Sumner — booking early typically gets the best price, especially during peak season.
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