Set in the western foothills of the Brecon Beacons, Plas Glansevin is a secluded Grade II-listed Georgian Mansion and Annexe that provides an elegant and unique environment for any event, be it weekend getaway, party, wedding, or corporate break.

Houses on the splendid scale of Plas Glansevin are few and far between. Set in ten acres, Plas Glansevin comprises a Mansion House and Annexe, which can accommodate parties of up to 56. It is thought that a dwelling has been sited at Plas Glansevin for about a thousand years. The 800-year-old oak tree that dominates the front lawn has long been a part of the site’s history and is often used as the perfect setting for weddings and blessings.

Welcome to Plas Glansevin

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Specify how many guests and when you would like your booking to begin.

Check the Calendar for availability.

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We had a fantastic wedding at Plas Glansevin. So many people spend so many months planning their wedding and then it’s all over in a few hours. we feel very lucky that we had a whole weekend – not just a wedding, a football game, a bouncy castle, a table tennis tournament, a pool tournament, a disco, a quiz night and lots and lots of nice things to drink and amazing food by Charlotte. The Mansion and the Annexe were absolutely perfect, our family and friends all had comfortable rooms and loved the house. The children had an amazing time chasing each other round the house. There was lots of laughter all weekend and a few tears when it was time to go. It really was a weekend to treasure, and everything we had hoped for. Thanks so much for all your help, and for having the house so perfect for when we arrived. Best wishes and many many thanks.

Helen and Dan

Picture of team building exercise outdoors

Corporate Team Building

Plas Glansevin offers complete privacy and seclusion in a versatile environment that will inspire your team, providing an ideal location for strategic planning, team building, management retreats, outdoor oriented programmes, and fun getaways.

Main meeting rooms will house theatre-style layouts (30+), and up to eight breakout meetings can be held at any time in smaller reception rooms throughout Plas Glansevin. The main meeting room can be laid out to your specification with flip charts and wall-mounted projector screens. Plasma screens and digital projectors may be rented on your behalf from local specialist contractors. We also have complementary wireless broadband running throughout Plas Glansevin.

Picture of the staircase in the entrance hall

About Us & Our History

It is thought that a dwelling, originally known as Llansevin, has been sited at Plas Glansevin for about a thousand years. There is a story in Welsh legend that Marchel, mother of St. Brychan Brycheiniog, king of the Kingdom of Brycheiniog (Brecon), whilst on a journey to Ireland with an escort of 300 men, rested for one night at “Llansevin”.

Harvey Peters is the owner of Plas Glansevin and the founder of Minerva Consulting which has been based here since 1985. Harvey works in the UK and internationally, facilitating leadership and team-building programmes. Harvey’s wife, Osanna Peters, is responsible for the interior design at Plas Glansevin, collecting artwork and furniture from her travels across Africa, Europe, and South East Asia.

Picture of couple taking the wedding vows

Weddings & Parties

Plas Glansevin makes the ideal location for your celebration, whether it be anniversary, reunion, birthday party or wedding. Our Grade II-listed Georgian Mansion House provides an elegant yet bohemian setting . The beautiful grounds offer a stunning backdrop for group and family photographs.

We have a wedding licence, you can also have a wedding celebrant who will compose a blessing for you to be held at Glansevin. We have had many wonderful weddings here and the buildings and the grounds will really lend themselves to whatever style of celebration you are planning. We often have services under the majestic 800 year old oak tree on the front lawn of the house. We also have many other grand rooms to choose from. We can put you in touch with local florists, hairdressers, musicians, etc.

Facebook Posts

Plunge pool.. Party ideas; hold a swimming gala?!☀️️🐳🏊🏼‍♀️🏤🌳☀️
#glansevinmansion #summerbreak
#privatehirepartyhouse #partyideas #exclusiveuse #nocorkage
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🎊 🎉 20% DISCOUNT 🎉 🎊
We are offering 20% off our tariff on our last few remaining free dates this Summer. Summer garden party? Gather family & friends ☀️🌻🌸🌳☀️
We have a couple of June weekends available, and one in July, or how about a September garden party?
🍾No corkage🍾
🏤Exclusive hire🏤 what's not to like?!
☎️01550 777121
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A super sea of bluebells in Dinefwr, just down the valley from Glansevin. With a castle & tearooms it's a great place to visit while staying at Glansevin #nationaltrustgardens #dinefwrpark #daysout #carmarthenshiretourism #bluebellsinmay ☀️ ... See MoreSee Less

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30% May & June DISCOUNT‼️💰‼️


We have a couple of weekends available in May & June which are not booked...

It's just the way the cookie crumbles with bookings, July & August are pretty much fully booked, but these few weekends earlier in the Summer remain available.

And we hate to see Glansevin empty!!

So we are DISCOUNTING a whopping 30% on the weekend of 19th May, and a couple of June weekends 🎉🎉

Take the whole venue to sleep up to 60 - throw a party?

Or perhaps a more intimate gathering for 20-30, by renting the Mansion House only.

The choice is yours!
Speak to Caroline on 01550 777121 or email her on
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Wonderful keepsakes the hosts have had made for all their guests holidaying at the Mansion this week ❤️ #specialkeepsake #memoriesofholidays #glansevintreats #holidayfun #cuppatocherish ... See MoreSee Less

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Glansevin Easter Greetings #glansevinbunnies #eastergarden #holidayfun #egghunt #familyholidays #mansiongarden #countryhideaway ... See MoreSee Less

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A group of family and friends have arrived - an Easter break for 60.

As they wind their way up the driveway
the mansion comes into view along with the 800 yr oak tree: just budding into green!!

Super local contractor Ian has mown the lawns to perfection!!

The sun is shining & we wish them a wonderful holiday!! ☀️🏤🌳🌾
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We had a lovely group of IT engineers at Glansevin last week enjoying a well-earned away stay.

Corporate team building enriched with social evenings... And on the final morning... some calming yoga!!

Thank you to Carmarthenshire yoga guru Loz Archer for her wonderful approach to corporate yoga 🙆🏻‍♂️🙅🏼

#yogaatthemansion #corporateideas #unwindatglansevin #lozarcher #zendenyoga #tranquilityfortheteam
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Happy Friday!! 🌤🏡
#springflowers #glansevinblooms #natureinwales #welshcountryside❤️
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We are thinking this would be fantastic out on our lawns for a corporate staycation!!

We host several corporate breaks each year; Looking to host a business stay?

With large meeting areas & smaller break-out side rooms, plus fabulous grounds, Glansevin has the space & scope to host superb work & team build meetings/activities.

The venue is yours exclusively; choose to self-cater or hire in local, highly recommended caterers & style your event your way, 🔜

#corporategroups #treattheteam #exclusivehire #groupactivityvenue
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The world's longest inflatable obstacle course is touring the UK.

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