Do you charge booking fees?

No. Our venue-finding service is completely free for event organisers — we are paid by the venues we partner with, never by you.

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Over 25,000 verified conference venues, meeting rooms, hotels and unique event spaces across 18 countries.

How fast will I receive proposals?

Tailored proposals are typically delivered within 2 hours during UK business hours. VenuClaw, our AI assistant, is available 24/7.

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InternationalVenues.com is operated by Jigsaw Conferences Ltd — a UK venue-finding agency trusted by government, FTSE 100 and procurement teams since 2003. ISO 27001 certified.

Do you cover venues outside the UK?

Yes. We source venues across Europe, the Middle East, the Americas and Asia-Pacific. Most enquiries are sourced within 2 working hours regardless of region.

Conference Venues in Portsmouth for 251-500 Guests

3 venues available — free service, no booking fees

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Showing 3 of 3 venues

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Conference Centre

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Harbour railway

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Portsmouth

Boathouse 7

Gunwharf Quays, PO1 3TZ

300

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350

Harbour viewsParking

Modern waterfront conference centre at Portsmouth's premier shopping destination...

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Hotel

CLAIM

Cosham railway

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Portsmouth

Portsmouth Marriott Hotel

North Harbour, PO6 4SH

400

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500

Parking

Modern 4-star Marriott hotel in Portsmouth offering extensive conference facilit...

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Hotel

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Southsea railway

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Portsmouth

Holiday Inn Portsmouth

Pembroke Road, PO1 2TA

300

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350

On-site parkingHarbour views

Modern waterfront hotel in Portsmouth city centre with versatile meeting facilit...

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About Conference Venues in Portsmouth for 251-500 Guests

Browse 3 conference venues in Portsmouth suitable for 251-500 guests. Compare conference facilities with AV equipment, breakout rooms, and professional eve Portsmouth offers 3 venues for conference events accommodating 251-500 guests. Each venue has been verified and includes details on capacity, pricing, facilities, and availability. Use our free venue finding service to compare options and receive proposals with no booking fees.