
citizenM Boston Back Bay
Best for travelers who want compact, high-tech rooms, a 24-hour restaurant, and a rooftop drinks scene.
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citizenM Boston Back Bay is a tech-forward, 4-star Back Bay hotel with compact smart rooms, a 24/7 canteen and a 15th-floor rooftop bar; read this if you want modern, connected rooms and easy access to Newbury Street and Fenway. Hotel Commonwealth is a long-running 4.5-star Fenway–Kenmore favorite with full-service amenities and two on-site restaurants; read this if you prefer a more traditional, full-service hotel near Kenmore Square and Fenway Park.
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Best for travelers who want compact, high-tech rooms, a 24-hour restaurant, and a rooftop drinks scene.

Best for travelers who want a classic, full-service hotel near Kenmore Square and Fenway Park with multiple room options and event space.
When citizenM Boston Back Bay wins: choose citizenM if you want a modern, compact room with smart in-room controls, 24/7 dining, a 15th-floor rooftop bar (21+ policy) and easy access to Newbury Street and Back Bay walkability.
When Hotel Commonwealth wins: pick Hotel Commonwealth if you prefer a larger, full-service hotel experience with multiple restaurants, on-site concierge services, ballroom/meeting space and a long-established location near Kenmore Square and Fenway Park.
Bottom line: both hotels put you within easy reach of Fenway and Back Bay—go citizenM for a tech-forward, grab-and-go lifestyle and rooftop cocktails; go Hotel Commonwealth for traditional hotel facilities, more room variety and full-service amenities.
| Category | citizenM Boston Back Bay | Hotel Commonwealth |
|---|---|---|
| Overall vibe | Contemporary, compact and tech-first | Traditional, full-service luxury |
| Location | Back Bay / Newbury Street — walkable to shops, museums and Fenway | Fenway–Kenmore near Kenmore Square and Boston University |
| Size | 399 rooms across 14 floors | 245 rooms (individually decorated) |
| Ages / audience | All ages welcome; children 11+ charged as adults; adults-only rooftop bar | All ages welcome (not adults-only) |
| Pools / beach | No on-site pool or beach | |
| Restaurants & bars | canteenM (24/7 international) + Bubble Bath rooftop (21+) | Two on-site restaurants including Blue Ribbon Sushi, plus a bar/lounge and room service |
| Spa / wellness | 24-hour fitness center with Peloton bikes; no spa | 24-hour fitness facilities listed; no dedicated on-site spa published |
| Known for | Smart rooms with iPad controls, rooftop cocktails and round-the-clock dining | Proximity to Fenway/Kenmore, conference/ballroom space and multi-room options |
| Parking & transport | No on-site parking; near Green Line and Hynes stop | Valet parking available (surcharge); near Kenmore and Green Line |
| Event space | No dedicated ballroom/event venue published | Extensive meeting/conference and ballroom space (~16,446 sq ft / 1,528 m²) |
citizenM sits on Newbury Street with immediate access to shops, Back Bay sights and a Green Line stop nearby.
Choose citizenM for maximum Back Bay walkability and quick access to Newbury Street shopping.
Hotel Commonwealth is in Fenway–Kenmore, a short walk to Kenmore Square, Boston University and Fenway Park.
Pick Hotel Commonwealth if you want to be in the Kenmore/Fenway hub near universities and game-night foot traffic.
citizenM focuses on compact, tech-driven rooms with consistent features across a large room count.
If you want modern, uniform rooms with smart controls, citizenM is geared for that.
Hotel Commonwealth offers many room types and individually decorated guestrooms suited to different needs.
Choose Hotel Commonwealth when you want more room-style variety or a suite option.
citizenM centers food and drinks around a 24/7 canteen and a rooftop Champagne/wine bar.
Great for flexible dining hours and a rooftop cocktail scene—note the rooftop is 21+.
Hotel Commonwealth lists two on-site restaurants including Blue Ribbon Sushi and a bar/lounge with room service.
Hotel Commonwealth suits guests who expect full-service dining options and in-room service.
citizenM does not have a pool; its signature amenity is the 15th-floor rooftop bar with city views.
The rooftop is citizenM’s main special feature—good for evening drinks rather than poolside leisure.
Hotel Commonwealth’s notable facility is its larger meeting/ballroom footprint and full-service hotel offer.
Hotel Commonwealth is better suited when event space or banquet facilities matter more than rooftop nightlife.
citizenM provides a 24-hour fitness center and a nightlife draw through its rooftop bar.
Good for guests who want to keep to a fitness routine and enjoy rooftop cocktails afterward.
Hotel Commonwealth lists 24-hour fitness facilities and places guests within walking distance of Kenmore nightlife.
Hotel Commonwealth places you near Fenway’s event venues and supports event nights with concierge services.

citizenM’s iPad room controls, free high-speed Wi‑Fi and 24/7 canteen make it ideal for connected stays.

Hotel Commonwealth’s location near Kenmore Square and multiple room types suits groups and families attending events.

canteenM is open 24/7 for meals and snacks; good for jet-lagged or late-arriving guests.

Hotel Commonwealth offers large meeting and ballroom space and event services not published for citizenM.
citizenM Boston Back Bay is on Newbury Street and is a 1-minute walk to shops; Hotel Commonwealth is farther away in Kenmore.
No — neither citizenM Boston Back Bay nor Hotel Commonwealth lists an on-site swimming pool; a dedicated spa is not published for citizenM and no on-site spa is published for Hotel Commonwealth in the supplied listing.
Yes — citizenM has canteenM (24/7) and Bubble Bath rooftop (21+); Hotel Commonwealth lists two restaurants (including Blue Ribbon Sushi), a bar/lounge and limited-hours room service.
Both accept children; citizenM is family-friendly but does not offer cribs or extra beds and charges children 11+ as adults. Hotel Commonwealth accommodates families with a wider range of room types.
Explore how citizenM Boston Back Bay stacks up against other hotels nearby:
vs. sites like Expedia, Hotels.com and other OTAs ·