ST MARY'S SQUARE
DEVELOPMENTS
About Us
St Mary’s Square Developments is a premier property development company based in Swansea, Wales, specializing in high-quality mixed-use and build-to-rent private developments. Our mission is to create vibrant, sustainable, and thoughtfully designed spaces that enhance communities and elevate modern living.
With a strong commitment to excellence, we focus on delivering premium residential and commercial properties that blend contemporary design with practicality. Our developments are crafted to meet the evolving needs of urban living, offering high-specification homes in prime locations while seamlessly integrating retail and lifestyle spaces.
At St Mary’s Square Developments, we take pride in our attention to detail, commitment to sustainability, and innovative approach to placemaking. Whether revitalizing city centers or creating new residential hubs, we are dedicated to shaping the future of property development in Wales and beyond.
Princess Way, Swansea
Castle Quays
Castle Quays, acquired in 2025, is a prominent mixed-use development located in the heart of Swansea, comprising seven commercial units totalling 75,000 square feet. Positioned strategically within the city centre, Castle Quays plays a key role in Swansea’s ongoing regeneration, offering both convenience and appeal to shoppers, diners, and fitness enthusiasts alike.
Development acquired in 2025
7 commercial units totalling 75,000 sq ft
Tenants include Slaters, The Gym, Coffee#1, Loungers and Tiger
Union Street, Swansea
Mond Buildings
The Mond Buildings, a distinguished Grade II-listed structure in Swansea city centre, were acquired in 2024 by St Mary’s Square Developments as part of a transformative redevelopment initiative. This redevelopment aligns with Swansea’s broader £1 billion city centre regeneration strategy, which includes the revitalization of other historic landmarks like the Albert Hall and Palace Theatre.
Acquired in 2024 under construction
A 6,000 sq ft grade II listed building
To be converted into mixed use scheme
Princess Way & College Street, Swansea
Kings Buildings
Kings Buildings in Swansea City Centre is a landmark development featuring 19 premium private rentals and several vibrant commercial units home to thriving independent businesses.
Development Completed in 2023
19x 1, 2 & 3 Bedroom Apartments – Private Rental
7x Commercial Units
Let to AWA Restaurant, Dough Republic, Frozzio, Cake Box and Storyteller Bar
Princess Way, Swansea
Princess Lofts
Princess Lofts in Swansea City Centre is a modern mixed-use development featuring high-quality private rentals and a stylish ground-floor restaurant.
Development Completed 2013
20x Studio apartments, Private Rental
Commercial Ground Floor
Let to ORKA Restaurant
St Mary's Square, Swansea
Llanfair Buildings
Llanfair Buildings in Swansea City Centre offers modern student accommodation alongside vibrant commercial units.
Development Completed in 2015
22x Studio Apartments – Student Development
3x Commercial Units
Let to Saint Hugo & Catrefi Cymru
Walter Road, Swansea
Churchill Buildings
Churchill Buildings located in The Uplands, Swansea is a vibrant mixed-use development offering premium residential living alongside dynamic commercial spaces.
Development completed in 2016
10x 1&2 Bedroom apartments
3x Commercial units
Let to Pizza Boyz and Student Digz
The Mumbles, Swansea
510 Mumbles Road
Located in Swansea’s tourism hot spot, The Mumbles, this development features stylish apartments alongside a thriving commercial unit, home to a popular independent restaurant.
Development completed 2010
1x 3 Bed Apartment
1x Commercial unit
Let to Dark Horse Mumbles.
GET IN TOUCH
If you have any questions on any of our developments, drop us an email: