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

Book Llwyn Onn Guest House - Premium Stays in Merthyr Tydfil, Glamorgan

Book on our site
up to 10% cheaper
than Booking.com
Check rooms and rates
From$105 /night
Check-in
01Jun
Check-out
02Jul
Rooms and Guests2 Guests, 1 Room
Key details

About the Hotel

Llwyn Onn, Merthyr Tydfil, CF48 2HT
-
Close to Brecon Beacons National Park
Perfect
9.0
9.5
/10
4.7
4.8
/5

4-star AA & Welsh Tourist Board guest house overlooking the Llwyn Onn reservoir in the Brecon Beacons

Location & Setting

Llwyn Onn Guest House sits in a quiet spot overlooking the Llwyn Onn reservoir, surrounded by the Brecon Beacons National Park. The hotel provides direct access to scenic walking trails and a short drive to Pen y Fan mountain. Guests can reach Cyfarthfa Park and Museum within 10 minutes by car.

Accommodation

The guest house offers 11 en-suite bedrooms, including rooms with garden views and a view over the reservoir. Each room comes with a private bathroom, a fridge, and a tea/coffee maker. Rooms feature a bath or shower, with some providing space for a wheelchair.

Breakfast & Dietary Options

Breakfast is a full Welsh cooked breakfast served fresh to order, with options including cereals, yoghurt, croissants, and fruit juice. The owners accommodate dietary restrictions with customized breakfast choices for guests with allergies or specific needs. Staff provide packed breakfasts for early morning departures.

Outdoor Activities

The hotel arranges diverse outdoor activities including hiking, fishing, and cycling in the surrounding area. Guests can go horse riding or golfing at a nearby course, and the reservoir offers direct walking routes. A classic car tour group uses the hotel as a base for exploring the Brecon Beacons.

Amenities & Services

Free WiFi is available throughout the property, and there is ample off-road parking for all guests. A shared lounge and TV area, plus a terrace with garden furniture, offer spaces to relax. The hotel provides a fridge and hair dryer in each room, and a guest house kit for self-service check-in.

Highlights

Location: 5 min drive to Pen y Fan car park

Rooms: 11 en-suite with garden or reservoir views

Breakfast: Full Welsh cooked to order with diet options

Activities: Hiking, fishing, cycling, horse riding

Service: Personalized breakfast and early departure packs

Accessibility: Wheelchair-accessible rooms and ground floor

“This guest house strikes a good balance, offering a tranquil setting with the convenience of ample parking and easy access to the stunning Brecon Beacons. I found the rooms to be well-maintained and comfortable, with breakfast consistently highlighted as a strong point, featuring locally sourced ingredients and a hearty Welsh spread. It feels like a well-run establishment where the hosts genuinely care about making a stay pleasant.”
Hotel logo
James DavidEditor-in-Chief at Ukglamorgan

Select your room type

Llwyn Onn Guest House offers a variety of rooms including double rooms, family rooms, and suites with breakfast, free cancelations, and special deals
  • Double Room Garden View
    2 persons
    20 m²
    1 Double bed
    Bathtub
    Heating
  • Executive Twin Room
    2 persons
    20 m²
    2 Single beds
    Bathtub
    Heating
  • Executive Double Room
    2 persons
    20 m²
    1 Double bed
    Bathtub
    Heating

Price and Room Availability Calendar

Check availability and prices for your dates now!
June 2026 - June 2027
Sun
Mon
Tue
Wed
Thu
Fri
Sat
June 2026
29
30
1
2
3
4
5
July 2026
29
30
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
1
2
August 2026
27
28
29
30
31
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
1
2
3
4
5
6
September 2026
31
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
1
2
3
4
October 2026
28
29
30
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
1
November 2026
26
27
28
29
30
31
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
1
2
3
4
5
6
December 2026
30
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
1
2
3
January 2027
28
29
30
31
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
February 2027
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
March 2027
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
1
2
3
4
April 2027
29
30
31
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
1
2
May 2027
26
27
28
29
30
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
1
2
3
4
5
6
Choose dates to see prices
Check-in/ Check-out

Facilities

Llwyn Onn Guest House offers amenities for your comfortable stay and unforgettable experiences
Facilities: Perfect
9.0/10Review 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 Delights
  • Top Attractions
  • Activities
  • Dining
  • Entertainment
Llwyn-on Reservoir
10 minutes' walk
Primarily known for scenic walks and birdwatching, this serene reservoir features multiple trails and picnic spots.
Cyfarthfa Castle
15 minutes' drive
An impressive 19th-century castle, home to a museum exploring local history, with beautiful grounds perfect for a stroll.
Brecon Mountain Railway
15 minutes' drive
A charming steam train experience through the stunning Brecon Beacons, offering breathtaking views and family fun.
Pontsarn Viaduct
10 minutes' drive
This historic railway viaduct features walking paths with great views, ideal for photography and leisurely hikes.
Hiking in Taf Fechan Nature Reserve
10 minutes' drive
A haven for outdoor enthusiasts, this nature reserve offers extensive trails for hiking and birdwatching in tranquil settings.
Merthyr Cilsanws Golf Club
10 minutes' drive
A challenging 18-hole course frequented by golf lovers, with stunning views and facilities for a relaxing day outdoors.
The Redhouse
15 minutes' drive
A lively cultural venue offering a diverse menu with locally sourced ingredients. Reservations recommended for peak times.
The Grill on the Hill
10 minutes' drive
This casual eatery serves British classics in a relaxed atmosphere. Vegetarian options available, and reservations are advised.
Upper Boat Studios
15 minutes' drive
A creative hub offering live music and shows frequently. Check their schedule for family-friendly events and performances.
Redhouse
15 minutes' drive
This arts center features live performances and events across various genres, providing vibrant experiences for all ages.
Getting around
  • 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 see Exclusive Early Booking Rate?
Get exlusive rates right now!
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

Reviews and Ratings

Feedback about Llwyn Onn Guest House from previous guests about their experience.
Review score
Based on 253 verified reviews
8.9 /10
Great
92 %
Recommend
Breakfast
9.4/10
Cleanliness
9.2/10
Comfort
9.3/10
Facilities
9.0/10
Free WiFi
9.7/10
Location
9.3/10
Paid Wi-Fi
9.0/10
Staff
9.6/10
Value for money
9.2/10
Pros
Friendly staff
Excellent breakfast
Convenient location
Comfortable beds
Cons
Dated rooms
Broken shower
Uncleanliness
Noisy fridge
Guest reviews
based on 437 reviews
9.0/10
No reviews yet on our siteUnfortunately, our guests have not yet left any reviews for this hotel, but you can read reviews from Booking.com.
Open reviews

Next best alternative

Consider them for your next trip.
Check-in
01Jun
Check-out
02Jul
Rooms and Guests2 Guests, 1 Room