40th Birthday Venues for Hire in Cardiff

Booking costs of 40th birthday venues average £500 minimum spend per event. Costs vary depending on guest capacity, popularity, location, and amenities like sound systems or bar services. Extra charges may apply for custom catering, decor, or event planning services. Packages with add-ons, such as DJs, photo booths, or other entertainment services, can also increase the overall cost. Check out the typical price ranges in Cardiff, based on Tagvenue data:

Based on the popularity and user ratings on Tagvenue (updated November 2026), the best options include:

• Birthday Party at Cardiff City Stadium in Cardiff Outskirts - rated 5/5
  Our user said: ‘Thank you for making it such a special occasion.’

• PARTY AND EVENT VENUE at DNC BAR in Cardiff Centre - rated 4.8/5
  Our user said: ‘Staff were fantastic, venue is perfect for an 18th party.’

• Viewing Deck at Lo Lounge in Cardiff - rated 4.8/5
  Our user said: ‘Location was great over looking the bay. Would highly recommend booking this venue.’

You'll find 40th birthday venues in various sizes, from smaller spots to larger venues; keep in mind that the type of space and your chosen layout will affect the capacity! Below you can see the typical venue sizes in Cardiff, together with the standard prices in each size range, based on Tagvenue data (November 2026):

These are the venues within 0.1 mi from central Cardiff, available to book on Tagvenue:

• Upstairs Room at O'Neill's St Mary Street Cardiff on 85-87 St Mary St, Cardiff - 0.1 mi from centre.
  Our user said: ‘What I liked about the place we rented was the great location, fantastic atmosphere, and friendly staff.’
• Full Venue Hire at The Cocktail Club Cardiff on 75 Saint Mary Street - 0.1 mi from centre.
  Venue said: What sets it apart: Permission to hire an external DJ gives hosts direct control over the venue's music for private events.
• Bar 3 at Bonnie Rogues Pub on 42-43 St Mary Street - 0.1 mi from centre.
  Our user said: ‘Excellent space! In the mix so we still benefitted from the atmosphere of the bar, and easy access to drinks.’

Based on Tagvenue data (as of November 2026), users looking for 40th birthday venues most commonly go for these venue types:

• The Greenhouse at The Botanist Cardiff Central, rated 4.6/5 - dining room for 30 guests
  Our user said: ‘Great little space, set off from the main restaurant.’

• Downstairs Section at O'Neill's Trinity Street Cardiff, rated 4.8/5 - function room for 40 guests
  Our user said: ‘Venue was great size, bar staff were brilliant...’

• The Yellow Bedroom at Neighbourhood Bedrooms - creative space for 8 guests
  Venue said: Situated just an 8-minute walk from Cardiff city centre and the Principality Stadium, the Yellow Room offers easy access for teams, creators, and clients.

• Upper Level at Be At One Cardiff, from £250 minimum spend per event (up to 100 guests standing)
  Venue said: It’s the perfect way to double the fun while keeping within your budget. Make your event truly memorable by choosing the Upper Level at Be At One Cardiff—a space designed to make your special moments even more extraordinary.

• Private Room in A Lounge at Wow Lounge Cardiff, from £15 hire fee per hour (up to 25 guests standing)
  Venue said: Our lounge provides a setting for intimate gatherings, private parties, or VIP events. A capacity for up to 20 guests. We have plush seating and lovely lighting that sets the mood.

• The Duchess at Lo Lounge, from £80 hire fee per event (up to 50 guests standing)
  Venue said: The Duchess is a Private space in Lo Lounge and is a long, narrow room organised around a single banquet-style table that creates an intimate, private dining layout.

• Start choosing the type of celebration you want. Consider the size of your guest list and the atmosphere you're aiming for – is it going to be a family gathering in a private dining room like the one at Gaucho Cardiff’s, or something in between?
• Next, think about location and convenience. Choose a venue that your guests can reach easily, and check if it offers essential amenities like parking, catering options, or a sound system for entertainment. If you’d like to personalise the hired space, look for venues that allow you to decorate or that offer customisable packages to fit your vision.
• Lastly, check reviews and ratings from past customers to get a sense of what you can expect from a particular venue. 

That’s it! With these factors in mind, you're sure to find the perfect venue to make your 40th birthday celebration truly magical!

To secure the best venue for your 40th birthday in Cardiff, try to book it at least 3 to 6 months in advance. Popular venues in high-demand areas, such as Cardiff Bay or the city centre, usually get booked quickly, especially during summer weekends or the holiday season. If your event falls on a holiday or during busy months (May to September and December), think about booking even earlier to avoid disappointment.

If you’re looking at quieter times of the year or areas with lower demand, such as Cardiff’s outskirts, you may have more flexibility and could potentially book closer to your event date. However, it’s always a good idea to plan ahead, particularly if you’re seeking a specific style of venue or additional services like catering or entertainment. Booking early also gives you more time to plan your celebration and coordinate with vendors.

Inclusions vary depending on the venue, but most offer the necessary amenities to ensure your celebration runs smoothly. Typically, you can expect the basics, such as tables, chairs, and access to facilities like restrooms and a bar. Many venues also offer catering packages, which can include food and drinks. Some may have event staff on hand to help with setting up and managing the event. For added convenience, many 40th birthday venues provide audio-visual equipment like sound systems or projectors for entertainment or speeches.