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 Twentyone 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
Twentyone is located in athens, greece. The surrounding area offers local dining, shopping, and attractions within walking distance.
⭐ What Guests Say
Twentyone is rated 9.3/10 (Exceptional) based on 732 verified guest reviews.
🏨 Amenities
💰 Price Guide
Rooms at Twentyone 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': 'Kolokotroni & Mykonou Kefalari Kifissia 21', 'city': 'Athens', 'region': '', 'postal_code': '', 'country': 'Greece'}
❓ Frequently Asked Questions
How much does Twentyone cost per night?
Rooms at Twentyone start from approximately €150/night. Booking through IMPT matches Booking.com prices — new members also receive a €5 signup credit.
Is Twentyone worth the price?
At 9.3/10 from 732 verified reviews, Twentyone is rated Exceptional. At €150/night for a 4-star athens hotel, it offers solid value — especially with IMPT's 10% discount.
Does Twentyone have a pool?
Yes. Twentyone has a swimming pool. Check with the hotel for seasonal opening hours. Guests consistently mention the pool as a highlight of their stay.
Does Twentyone have parking?
Yes — Twentyone offers free on-site parking. This is a significant advantage, as central hotel parking can be expensive.
Does Twentyone have a restaurant?
Yes. Twentyone has an on-site restaurant. Many rates include breakfast. Room service may also be available.
What is the carbon impact of staying at Twentyone?
An average hotel night produces ~35 kg of CO₂. When you book Twentyone 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 Twentyone?
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 Twentyone?
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 Twentyone in?
Twentyone is located in athens. The surrounding area offers a mix of local restaurants, shops, and attractions. See the Neighbourhood section above for specific distances and walking times.
Is Twentyone good for families?
Yes — Twentyone offers a swimming pool, and is well-suited for families visiting athens.
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 Twentyone an eco-friendly hotel?
When booked through IMPT, Twentyone 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 athens?
Prices and availability vary by season. Check IMPT for the latest rates at Twentyone — booking early typically gets the best price, especially during peak season.
More Hotels in athens
Browse by category:
Eco Hotels · Budget Hotels · Luxury Hotels · 4-Star Hotels · Boutique Hotels · Pool Hotels · Adults Only · Family Hotels · Romantic Hotels · Spa Hotels · All-Inclusive