Tang Tret Cosmo in Hanoi, Vietnam

Tầng Trệt Cosmo is a café at 10 Khúc Hạo in Ba Đình, Hanoi, set in an older villa-style property with both indoor rooms and outdoor seating. It suits travelers who want a quieter break near central government and historic areas, couples or small groups looking for a photogenic café, and people who want to sit with a laptop rather than rush through a takeaway coffee. Current business-managed and verified directory profiles still list the café at the same address. The main practical caveat is that opening hours differ slightly across current sources, and one restaurant directory marks the venue closed, so it is sensible to confirm if you are making a special trip.

The café’s setting has long been one of its distinguishing features. Its claimed Tripadvisor profile describes an old French-style house shaded by mature trees, with separate indoor and outdoor areas for individuals, couples and larger groups. A 2026 interview with artist Hà Ninh recalls that he and friends opened Tầng Trệt Cosmo at 10 Khúc Hạo after he finished art school, while his professional CV identifies him as a founder and operator from 2014 to 2016. That artistic connection helps explain why older visitor accounts often focus as much on the building, decoration and atmosphere as on the drinks.

The current address is strongly corroborated. Tripadvisor, Foody, Địa Điểm 247 and Tôi Đi Cafe all place Tầng Trệt Cosmo on Khúc Hạo in Ba Đình. Most sources use number 10, while Tôi Đi Cafe displays 10B; because the business-managed Tripadvisor profile and several other listings agree on 10 Khúc Hạo, that is the safer address for publication. Taxi or ride-hailing is straightforward, and the café is close enough to the Ho Chi Minh Mausoleum area to work as a break before or after sightseeing in Ba Đình. Exact entrance coordinates were not independently verified, so the old WordPress map pin is not reused.

Coffee, tea and light café food form the core offer. Tripadvisor currently describes espresso-based coffee and imported tea and categorizes the venue for breakfast, brunch, lunch and dinner. Foody lists coffee, smoothies, juices, milk-based drinks and desserts, while its photo archive shows items such as sandwiches, cakes and a range of sweet drinks. Older Hanoi café guides repeatedly mention egg coffee, cheesecake, tiramisu and bread. These menu references are useful for understanding the style of the venue, but they should not be treated as a guaranteed 2026 menu because the café does not publish a clearly dated full menu on an official website.

The space appears designed for lingering rather than only quick service. Foody currently categorizes Tầng Trệt Cosmo as suitable for dates, groups, relaxation and takeaway and lists a capacity of about 100 adults. The claimed Tripadvisor profile also lists reservations, seating, outdoor seating, takeaway, free Wi-Fi and street parking. Địa Điểm 247 adds air conditioning, card payment, private-room and parking-related features, though that directory’s descriptive content was originally published years ago. The strongest current conclusion is simply that the café offers a mix of indoor and outdoor seating and supports both social visits and quieter stays.

Work-friendly use has been part of the café’s reputation for years. A Hanoi work-café guide describes it as quiet enough for concentration, with Wi-Fi, air conditioning and simple food alongside coffee. Foody reviews from 2020 and 2021 similarly describe a calm atmosphere and people using the café for conversation or focused time. These observations are dated rather than current guarantees, but they are consistent with the way present-day directory profiles continue to categorize the venue. Someone hoping to work for an hour or two should still choose a quieter period rather than assuming every table will be suitable during busy evenings.

Opening hours are the clearest current disagreement. The business-managed Tripadvisor profile currently lists 08:00–23:00 every day. Foody shows 07:00–22:30, Tôi Đi Cafe shows 07:30–22:30 and Địa Điểm 247 shows 08:00–22:30. Because Tripadvisor is a claimed business profile, 08:00–23:00 is the strongest single schedule to publish, but the variation should remain visible as a caveat. For an ordinary late morning or afternoon visit the discrepancy does not matter much; it matters mainly if you plan to arrive very early or stay close to closing.

Prices also vary somewhat by source. Foody currently displays a broad 20,000–100,000 VND range, while Tôi Đi Cafe shows 30,000–50,000 VND and an older work-café guide suggested roughly 30,000–100,000 VND. These ranges are best treated as indicative rather than exact. They may reflect different menu sections, old prices or partial data. There is no admission charge; a normal visit is based on food and drink purchases. Checking the current menu at the café is more reliable than planning around an old price point.

One unusual status conflict deserves mention. Riviu currently marks the Khúc Hạo venue as closed, yet Tripadvisor’s claimed profile, Foody’s verified listing, Tôi Đi Cafe and Địa Điểm 247 all still present it as operating, and current crawls continue to expose the address, contact and hours. The weight of evidence therefore supports treating Tầng Trệt Cosmo as active, while preserving Riviu’s conflicting status in the research record. If the café is central to your itinerary, a quick call to the listed number 024 6686 0517 is the sensible final check.

Accessibility information is incomplete. Địa Điểm 247 flags support for disabled guests, but current sources do not explain whether access is step-free from the pavement, whether all seating areas are reachable without stairs, or whether accessible toilets are available. The villa-style layout may include level changes, so visitors with specific mobility needs should ask directly before arrival. The same applies to parking: current sources mention street or on-site parking-related options, but exact capacity is not documented.

A typical visit of about one to two hours is reasonable for coffee, cake, conversation or a short laptop session, though this is an editorial estimate rather than a venue rule. The café’s main appeal is the combination of a leafy older property, mixed indoor-outdoor seating and a calmer character than many high-traffic central cafés. It is not a destination that requires a long itinerary slot, but it can work well as a deliberate pause around Ba Đình.

Tầng Trệt Cosmo is therefore best approached as a characterful Hanoi café with a long-running identity at 10 Khúc Hạo and enough current evidence to support an active listing. Its strongest features are the villa setting, flexible seating, broad coffee-and-tea format and suitability for both social and quieter visits. The details that need caution are the exact hours, current menu prices and the single conflicting closure listing. Visit during the middle of the day for the least uncertainty, use the Khúc Hạo address as the navigation anchor, and call ahead if opening status or a particular seating arrangement is important.