Sleepfare

Llwyn Onn Guest House

★★★★ Llwyn Onn, Merthyr Tydfil, GB

9 guest rating· 700 reviews

About this hotel

Scenic Views and Tranquil Setting

Enjoy breathtaking views of the Llwyn Onn reservoir from our idyllic guest house located in the heart of the picturesque Brecon Beacons.

Award-Winning Accommodation

Experience luxury and comfort in our 4-star AA and Welsh Tourist Board awarded guest house, offering 11 modern en-suite bedrooms designed for your relaxation and convenience.

Perfect Blend of Business and Leisure

Whether you're here for work or relaxation, Llwyn Onn Guest House provides a warm and welcoming atmosphere, ideal for unwinding after a day of exploring the beautiful surroundings.

Come and escape to Llwyn Onn Guest House for a memorable stay in the stunning Brecon Beacons.

Rooms & rates

Pick your dates. Prices are live, not cached.

Standard Single Room, Ensuite, Lake View

Sleeps 1 · Double bed

  • Partially open bathroom
  • Shower
  • Highchair
  • No housekeeping

<p><strong>1 Double Bed</strong></p><p>Overlooking the lake</p><br/><p><b>Bathroom</b> - Partially open bathroom and shower</p><p><b>Practical</b> - Highchair</p><p><b>Need to Know</b> - No housekeeping</p><p>Non-Smoking</p>

Double Room with Garden View

Sleeps 2 · 20 m² · Double bed

  • Desk
  • Private bathroom
  • Coffee/tea maker
  • Shower
  • TV

Modernized superior room in contemporary style, overlooking Llwyn Onn Reservoir.

Executive Double Room

Sleeps 2 · 20 m² · Double bed

  • Desk
  • Private bathroom
  • Coffee/tea maker
  • Shower
  • TV

All rooms are modernized to a hotel standard, with a warm, cozy and homely feel. Overlooking the woodland from either the 1st or 2nd floor.

Executive Twin Room

Sleeps 2 · 20 m² · 2× Twin bed

  • Desk
  • Private bathroom
  • Coffee/tea maker
  • Shower
  • TV

All rooms are modernized to a hotel standard, with a warm, cozy and homely feel. Overlooking the woodland.

Amenities

  • Free WiFi
  • Free Parking
  • Golf course
  • Non-smoking rooms
  • Non-smoking throughout
  • Access to health care professionals
  • Board games/puzzles
  • Canoeing
  • Cashless payment available
  • Cleaning standards that are effective against Coronavirus
  • Contactless check-in/check-out
  • Cycling
  • Delivered food - securely covered
  • Face masks for guests available
Show all 40 amenities
  • Facilities for disabled guests
  • Fax/photocopying
  • Fire extinguishers
  • First aid kit available
  • Fishing
  • Food delivered to guest room
  • Garden
  • Guest room sealed after cleaning
  • Guest rooms disinfected between stays
  • Hand sanitizer in guest room and key areas
  • Heating
  • Hiking
  • Horse riding
  • Invoice provided
  • Laundry washed per local authority guidelines
  • Meeting/banquet facilities
  • Outdoor furniture
  • Physical distancing in dining areas
  • Physical distancing rules followed
  • Process in place to check health of guests
  • Sanitized tableware & silverware
  • Shared lounge/TV area
  • Shared stationery like menus, pens are removed
  • Staff adhere to local safety protocols
  • Terrace
  • Thermometers for guests provided by property

Location

© OpenStreetMap contributors

Llwyn Onn, Merthyr Tydfil, GB

Check-in
from 04:00 PM to 08:00 PM
Check-out
until 10:30 AM

What guests say9700 reviews

+ Friendly staff+ Great location+ Excellent breakfast+ Clean and comfortable roomsLimited evening meal optionsSomewhat outdated common areas
Cleanliness9.1
Service9.1
Location9.2
Room Quality8.6
Amenities8.6
Value for Money9.1

Cosy guest house

10.0

The guest house was cosy, rooms very well sized and comfy beds. It was located within breacon beacons national Park, and within 30 minutes drive of most popular attractions in the area. Breakfast is large but tasty, with meat free options and a steady supply of tea and coffee. The host was very caring, providing insights into local attractions and making sure we enjoyed our stay.

Eleanor · GB · 2026-07-25

Guest review

9.0

Das Frühstück war sehr gut und das Personal ist wirklich sehr nett. Außerdem ist die Ausgangslage ideal um in den Breacon Mountains zu wandern.

Rebekka · DE · 2026-07-18

Guest review

10.0

A great place to stay if you are planning on exploring the national park. Cardiff central is only about an hour drive away as well. Breakfast is also very nice.

Campbell · AU · 2026-07-16

Guest review

9.0

Uitstekende ligging dichtbij verschillende wandelingen in de Beacons. Goed ontbijt. Vriendelijke eigenaars. Ruime parking.

Moeilijk om de temperatuur van het water van de douche te regelen. Lange haren op de vloer in de badkamer.

Frank · BE · 2026-07-15

Die zu heiße Dusche störte den Aufenthalt.

7.0

Die Lage ist für Wanderungen mit Autoanreise sehr gut. Die "englischen" Frühstücksteile (Eier, gebratene Tomate und Champignons...) werden frisch zubereitet. Das Personal ist sehr nett.

Die Dusche in der Badewanne hat kein kaltes Wasser und war in unserer Hitzeperiode zu heiß und daher nicht zu nutzen. Die nicht-englischen Frühstücksteile (Müsli, Saft, Toast, Obst...) waren unterdurchschnittlich.

Karen · DE · 2026-07-12

Welcoming and Comfortable

9.0

Staff were ultra friendly. The breakfast was super lush. The property was in a fairly quiet location. Lots of pubs and restaurants around in nearby towns. Plenty of parking too. Would book again without hesitation. The owner, in her 80s, is an inspiration and her and her staff all sat down together for tea after breakfast, which was lovely to see. Very welcoming. Facilities in the room were great including fridge and TV.

Decor was slightly outdated but clean and tidy.

Michelle · GB · 2026-07-11

Good to know

When booking 4 rooms or more, different policies and additional supplements will apply.

All requests for early check-in are subject to approval by the property.This property does not accommodate bachelor(ette) or similar parties.

A deposit may be required at the property.

Parking

Free private parking is possible on site (reservation is not needed).

Pets

Pets are not allowed.

Internet

WiFi is available in the hotel rooms and is free of charge.

Children and extra bed policy

Children of any age are allowed.

Children up to and including 1 year old stay for free when using an available cot.

Children up to and including 1 year old stay for free when using an existing bed.

Children from 2 years old to 5 years old stay for £5 per person per night when using an existing bed.

Children up to and including 5 years old stay for £5 per person per stay when using an available extra bed.

People 6 years old and over stay for £40 per person per night when using an available extra bed.

Any type of extra bed or child's cot/crib is upon request and needs to be confirmed by management.

Supplements are not calculated automatically in the total costs and will have to be paid for separately during your stay.