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Merthyr Tydfil
Llwyn Onn Guest House
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Llwyn Onn Guest House Merthyr Tydfil Exterior photoLlwyn Onn Guest House Merthyr Tydfil Exterior photoLlwyn Onn Guest House Merthyr Tydfil Room photo

LLWYN ONN GUEST HOUSE, Merthyr Tydfil

Book directly with us
— up to 10% cheaper
than on Booking.com
Check rooms and rates
From$105 /night
Check-in
02Jun
Check-out
03Jun
Rooms and Guests2 Guests, 1 Room
Key details

About the Hotel

Llwyn Onn, Merthyr Tydfil, CF48 2HT
-
Near the Llwyn-on Reservoir
Perfect
9.0
9.5
/10
4.7
4.8
/5

Loved by Llwyn Onn Guest House guests

Cute staff
Clean rooms
Comfortable beds
Delicious breakfast
Perfect location
"Very comfortable bed, bonus of a small fridge in the room - as we were hiking this proved useful for storing our food."
Anna from United Kingdom
read full review
"The room was very clean and plenty of parking outside the guest house."
george from United Kingdom
read full review
"Nice clean large room."
Haim
read full review

Location

Llwyn Onn Guest House is situated in Merthyr Tydfil, just moments from the Brecon Beacons National Park. The hotel is positioned alongside the scenic Llwyn Onn Reservoir, offering guests easy access to outdoor activities such as hiking and cycling. This location provides a peaceful escape while remaining conveniently close to local attractions.

Rooms

The hotel offers eight individually styled guest rooms, each equipped with en-suite bathrooms. Guests can choose from various room types, with options including twin, double, and family accommodations. Some rooms provide picturesque views of the reservoir, enhancing the overall experience.

Dining

Dining at Llwyn Onn Guest House features a breakfast menu made from locally sourced ingredients. Guests can enjoy options such as a hearty full English breakfast, lighter choices, and vegetarian selections. The on-site dining experience also allows for afternoon teas, providing a delightful treat.

Outdoor Activities

The hotel encourages exploring the area with comprehensive information on local hiking and walking trails. Guests can take advantage of nearby mountain biking routes, and fishing opportunities are available in the reservoir. Outdoor enthusiasts will find plenty of options to engage with nature.

Pet-Friendly Policies

Llwyn Onn Guest House allows well-behaved pets, making it easier for guests to travel with their furry companions. A designated pet-friendly room is available, ensuring comfort for both pets and their owners. This policy supports those looking to enjoy the outdoors without leaving their pets behind.

Highlights

Location: Brecon Beacons National Park nearby

Rooms: Eight individually styled guest rooms

Dining: Locally sourced breakfast menu

Outdoor Activities: Hiking and walking trails information

Pet-Friendly: Designated room available for pets

Must-do experiences

  • Hike the Brecon Beacons for stunning mountain views and fresh air.
  • Visit Cyfarthfa Castle and enjoy its rich history and lovely grounds.
  • Savor a traditional Welsh breakfast at the local café, The Red Cow.
  • Explore the Merthyr Tydfil Leisure Centre for indoor fun and activities.
  • Check out the bustling Merthyr Farmers' Market for local produce.

Select your preferred room

Choose from standard rooms, family suites, or deluxe options — with breakfast and flexible rates
    Double Room Garden View
    2 persons
    20 m²
    1 Double bed
    Bathtub
    Heating
    room details
    Executive Twin Room
    2 persons
    20 m²
    2 Single beds
    Bathtub
    Heating
    room details
    Executive Double Room
    2 persons
    20 m²
    1 Double bed
    Bathtub
    Heating
    room details

View our calendar

Check prices and secure your dates today
June 2026 - June 2027
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Check-in/ Check-out

Hotel facilities and services

Each hotel provides modern amenities for a relaxing and pleasant stay
Facilities: Perfect
9.1/10Review score

General

  • No smoking on site
  • Parking
  • No pets allowed
  • Rooms/ Facilities for disabled
  • Fire extinguishers

Sports & Fitness

  • Canoeing
  • Hiking
  • Horseback riding
  • Cycling
  • Golf course
  • Fishing

Guest Parking

  • Electric kettle

Business

  • Meeting/ Banquet facilities
  • Fax/Photocopying

Children

  • Cots
  • Board games

Spa & Leisure

  • Garden area
  • Leisure/ TV room

Room features

  • Free Wi-Fi in rooms
  • Heating
  • Sitting area
  • Patio
  • Terrace
  • Garden furniture
  • Tea and coffee facilities
  • Ironing facilities

Bathroom

  • Free toiletries

Self-catering

  • Electric kettle

Media

  • Flat-screen TV

Room decor

  • Carpeted floor
Show more

Llwyn Onn Guest House Location

Llwyn Onn, Merthyr Tydfil, CF48 2HT
Explore Merthyr Tydfil
Local Activities and Attractions
  • Top Attractions
  • Activities
  • Dining
  • Entertainment
Llwyn-on Reservoir
10 minutes' walk
Scenic waterside views ideal for picnics and short walks. A tranquil spot for relaxation and wildlife spotting.
Merthyr Cilsanws Golf Club
10 minutes' drive
Challenging golf course with stunning views of the valleys. Perfect for both beginners and seasoned golfers.
Cyfarthfa Castle
15 minutes' drive
Historic castle offering museum exhibits and beautiful parkland. Family-friendly with open grounds for exploration.
Brecon Mountain Railway
15 minutes' drive
Heritage steam railway featuring scenic rides through the Brecon Beacons National Park. A unique family attraction.
Hiking in Taf Fechan Nature Reserve
10 minutes' drive
Stunning hiking trails suited for all levels, featuring diverse landscapes and wildlife. Ideal for nature lovers.
Golfing at Merthyr Cilsanws Golf Club
10 minutes' drive
Unique golfing experience with breathtaking views. Club offers equipment rentals and facilities for all visitors.
The Brecon Grill
10 minutes' drive
Casual dining with a focus on locally sourced ingredients. Known for its hearty Welsh dishes and warm atmosphere.
The Redhouse
15 minutes' drive
Creative dishes in a vibrant space, featuring local beers and artisanal wines. Reservations recommended for dinner.
Redhouse
15 minutes' drive
Cultural venue with live music and performance arts. Offers events suitable for families and adults alike.
Merthyr Tydfil Theatre
15 minutes' drive
Local theatre showcasing plays, comedy, and live music. Family-friendly events and a cozy atmosphere.
Getting around the city
  • City Centre
    Merthyr Tydfil 10 min  ·  6.4 km
  • Airports
    Cardiff (CWL) 94 min  ·  62.4 km
    Swansea (SWS) 103 min  ·  68.1 km
  • Train
    Merthyr Tydfil Railway Station 11 min  ·  6.7 km
    Cwmbach Train Station 16 min  ·  10.4 km
Want to unlock exclusive early deals?
Access members-only prices today
Check Rates
Property information and rules
Check-in
from 16:00-20:00
Check-out
from 08:00-10:00
Guest Parking
Private parking is possible on site for free.
Internet
Wireless internet is available in the hotel rooms for free.
Breakfast
At the hotel Llwyn Onn Guest House guests are invited to a full breakfast served for free.
Children & extra beds
Maximum capacity of extra beds in a room is 1. 
Pets
Pets are not allowed.
Number of rooms:
7

Guest ratings and detailed reviews

Feedback about Llwyn Onn Guest House from previous guests about their experience.
Review summary
Based on recent reviews
Powered by AI
Llwyn Onn Guest House is frequently praised for its comfortable and well-maintained rooms. The location is ideal for exploring the Brecon Beacons National Park, being a short drive from Pen Y Fan and within easy reach of the four waterfalls. Guests appreciate the ample parking and often mention the delicious breakfast, although some have noted that the in-room heating could be improved. The guesthouse also features a pleasant outdoor seating area.
Show moreShow less
Review score
Based on 251 verified reviews
8.9 /10
Great
92 %
Recommend
Free WiFi
9.7/10
Staff
9.7/10
Paid Wi-Fi
9.0/10
Facilities
9.1/10
Pros
Delicious breakfast
Comfortable room
Ideal location
Cons
Room appearance
Guest reviews
based on 251 reviews
8.9/10
based on 434 reviews
9.0/10
Isabella from Italy
Couple
Executive Double Room
3 nights in November 2025
|
Reviewed: January 26, 2026
9.2/10

A good stay!

hot chocolate lovely touch waterfall suggestion amazing breakfast
I slept SO well after a long hike up Pen y Fan. Finding hot chocolate in the room was like such a treat. I really appreciated how the owner suggested some great waterfalls before my journey continued. Breakfast the next morning was AMAZING!!!
I found the window in the room didn't open very wide. It felt a little stuffy with the weather being warm.
Dining
9/10
Breakfast service offers very tasty food with an option of vegetarian breakfast on request. A GREAT cooked breakfast is available, including fresh ingredients.
Facilities
9/10
Parking is available directly outside the building. It is free and spacious. The garden is very lovely. Guests enjoyed sitting in it, too.
Rooms
9/10
The rooms include clean, cozy beds with comfortable mattresses. Bathrooms feature excellent showers. there is a mini-fridge in the room. Guests found the rooms VERY warm and relaxing.
Service
10/10
Staff members offer a friendly, helpful, and hotel-like service. The owner came to meet guests during breakfast. She was cute. The staff is well organised and efficient.
Location
9/10
The location offers close proximity to tourist destinations. Bike Park Wales and Brecon village are easily accessible from the hotel. It is also near Llwyn Onn Reservoir, where one can walk around.
0 Helpful
|
Show less
Charlotte from United Kingdom
Business traveller
Double Room Garden View
3 nights in November 2025
|
Reviewed: January 20, 2026
6/10
cramped breakfast room annoying buzz
the breakfast room felt a little cramped honestly I seemed like I was going to knock over a teacup every time I moved the walls seemed to close in plus that fan in the bathroom well it was like sleeping next to a jet engine and the lighting fixture it had this annoying buzz that kept me up half the night oh what fun
0 Helpful
Donald from United States
Single
Executive Twin Room
4 nights in November 2025
|
Reviewed: January 20, 2026
9/10

An Amazing Stay!

tasty treat helpful staff
I thought the Welsh breakfast was a very tasty treat. I really appreciated the scrambled eggs and the way they were prepared. The staff were amazing and very helpful. It was seamless to get into the room and relax.
0 Helpful
Cameron from United Kingdom
Single
Executive Double Room
3 nights in November 2025
|
Reviewed: January 19, 2026
9/10
bath shower complimentary toiletries breakfast variety
my room included a bath shower it was a great feature. i appreciated the complimentary toiletries provided in the bathroom. breakfast offered a good variety of options it was tasty.
the tv remote control needed new batteries it was a minor issue.
0 Helpful
Jacob from United Kingdom
Single
Double Room Garden View
3 nights in November 2025
|
Reviewed: January 06, 2026
9/10
fresh ingredients friendly staff garden view
The Welsh breakfast was excellent. It included fresh ingredients. The staff were friendly at breakfast. I could enjoy the view of the gardens during the meal, but the bed was super comfy!
The fridge in the room made a slight noise during the night.
0 Helpful
daniel from united kingdom
Single
executive double room
3 nights in August 2025
|
Reviewed: September 10, 2025
5/10
sticky residue disturbing stain
The location seemed alright. It was easy enough to find.
The so-called 'executive double room' was a letdown. It was more like a cramped single. there was a disturbing stain on the carpet. the television remote was to have been through a war. It barely functioned and was covered in sticky residue.
0 Helpful
victoria from united kingdom
Single
executive double room
3 nights in August 2025
|
Reviewed: August 25, 2025
5/10
tasteless breakfast rusty tiles
the full welsh breakfast really missed the mark for me , as it lacked any real flavor. apart from that , the variety of food and breakfast options was quite limited , i thought. the hotel room cleaning seemed rushed , and i noticed significant mold in the bathroom. rusty bathroom tiles were an eyesore , and dust was visible everywhere.
0 Helpful
Show more reviews
FAQs
About Llwyn Onn Guest House
What are the check-in and check-out times at Llwyn Onn Guest House?
Check-in at 16:00 and check-out is by 10:30.
Is parking available at Llwyn Onn Guest House?
Free private parking is available on-site without the need for reservations.
What internet access is offered at Llwyn Onn Guest House?
Guests can enjoy complimentary Wi-Fi throughout the property.
What room amenities can guests expect at Llwyn Onn Guest House?
Rooms include free toiletries, a kettle, a flat-screen TV with satellite channels, and coffee/tea making facilities.
What activities can guests enjoy at Llwyn Onn Guest House?
Guests can participate in fishing, golf, hiking, and horse riding.
Which famous attractions are near Llwyn Onn Guest House?
Nearby attractions include Cyfarthfa Castle (5 km), Morlais Castle (7 km), and Aberdare Swimming Pool (10 km).
How far is Llwyn Onn Guest House from Cardiff airport?
The hotel is 65 km from Cardiff Airport, approximately a 54-minute drive.
Are there options for outdoor activities arranged at Llwyn Onn Guest House?
Local outdoor activities such as sailing, climbing, and caving can be arranged.
Can guests access communal areas at Llwyn Onn Guest House?
Yes, there are spacious communal areas for guest engagement.
What unique features does Llwyn Onn Guest House offer?
The guest house overlooks the Llwyn Onn reservoir and offers picturesque views and scenic walks.
Is smoking allowed at Llwyn Onn Guest House?
The property is entirely non-smoking.

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  • Overview
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  • Price calendar
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  • Location
  • Reviews