Bay Windows in South Wales
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Bay windows project outward from the main wall, creating extra space and flooding rooms with natural light. They're one of the most sought-after window styles, adding both interior space and striking kerb appeal to any property.
Benefits
- Extra Space: Bay windows extend your room outward, creating a cosy window seat or display area.
- Maximum Light: The angled design allows light in from three directions for a brighter room.
- Kerb Appeal: A well-designed bay window transforms the look of your property from the street.
- Versatile Styles: Available in square, angled and curved configurations to suit any home.
- Energy Efficient: Modern A-rated glazing keeps your bay window as efficient as any standard window.
- Increased Value: Bay windows are a premium feature that adds value to your property.
Our bay windows range
- Square Bay Windows: Clean, modern lines for a contemporary box bay design.
- Angled Bay Windows: Classic 45-degree angled bays for traditional and Edwardian properties.
- Curved Bow Windows: Elegant curved bays that create a gentle, sweeping window line.
- Bay Window Roofs: GRP or tiled canopy roofs to protect and finish your bay window.
Bay and bow windows explained
A bay window projects from the wall in angled facets — typically a large central pane with two angled sides — while a bow window curves gently through four or more shallower facets. Both add floor space inside and bring light in from several directions, and both need each facet measured separately.
Bay window replacement is more involved than a flat window swap. The bay may carry load from above, the roof or canopy over the bay has to be sound, and the junctions between facets need to be weathertight. The survey checks all of this before anything is ordered.
Bay windows across South Wales and the South West
Bays are a signature of the Victorian and Edwardian terraces found across South Wales and the South West, and they appear on plenty of 1930s semis too. uPVC bay windows suit most replacements; aluminium bay windows give slimmer frames where the facets are narrow and the look is more contemporary.
For aluminium options, see our aluminium bay windows page. If you are replacing windows across the whole house, the bay can be specified alongside the flat windows so colours and handles match throughout.
Bay window installation and cost
Bay windows installation is planned around the structure: the old bay comes out, the opening is checked and supported as needed, and the new bay is fitted, sealed and finished inside and out. The canopy or roof over the bay is repaired or replaced as part of the same job where needed.
Cost depends on the number of facets, the size, the frame material, the glass and any structural or roof work. A written quote after a free home survey gives you the figure for your actual bay, and we beat any like-for-like quote. Our guide to bay and bow window replacement goes deeper into the process.
Frequently Asked Questions
How much do bay windows cost?
Bay window costs vary depending on size and style. Contact us for a free, no-obligation quote — we beat any like-for-like price.
Do bay windows need planning permission?
Most bay window replacements don't need planning permission. New installations may require approval depending on size and position.
Can you replace a bay window with a flat window?
Yes, though bay windows add value and character. We can advise on the best option for your property.
What is the difference between a bay and a bow window?
A bay has angled facets, usually three, with a larger central pane. A bow curves through four or more shallower facets for a gentler sweep. Both project from the wall and add space inside.
Can a flat window be converted into a bay?
Sometimes, but it involves structural work, a new roof or canopy and often planning considerations. The survey assesses whether your wall and opening suit a conversion.
Do bay windows leak or draught more than flat windows?
A well-fitted modern bay is as weathertight as any window. Leaks on older bays often come from the canopy roof or the junctions between facets, which the survey checks.
Get a Free Quote — We Beat Any Like-for-Like Quote
Get a free written quote. Free home survey. 10-year guarantee. Call 02920 860894 or request a callback.
Related glazing options
For the panels around a bay, see uPVC cladding.
Considering a dark finish? See our guide to anthracite grey bay windows.