Your Home Transformation Starts Here

Loft and garage conversion specialists with 35+ years’ experience across South Wales
and the West of England designed and
built exclusively with an in-house team.

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Years Experience

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Conversions Completed

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Customer Satisfaction

Since 1989, we’ve helped homeowners across South Wales, Bristol and the West transform unused lofts and garages into practical, beautifully finished living spaces.

We specialise exclusively in loft and garage conversions, and every project is delivered by our complete in-house team - never subcontractors. From the initial survey through to completion, you work with the same experienced craftsmen, ensuring consistent quality, clear communication and a genuinely stress-free build.

Who we are

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Or call us free on 0800 4583334 →

Why Choose Allied Welsh?

We provide a free loft conversion survey to assess your home, confirm viability, and design a solution that meets your needs. You’ll receive a clear, fixed-price quotation with no hidden costs.

Free Design Survey & Fixed Quote

With over 30 years’ experience and more than 3,500 loft conversions completed, we provide expert advice you can rely on at every stage of your project.

Loft & Garage Conversion Experience

Expertly Qualified In-House
Team

All loft and garage conversions are completed by our own employed trade and design team, ensuring consistent quality, reliability, and clear accountability from start to finish.

Your Trusted Conversion
Specialists

We’re proud of our strong reputation across Wales and the South West. We’re always pleased to see repeat customers as well as many new clients coming from recommendations.

What we do

Loft
Conversions

Garage
Conversions

Our work in your area

Search our interactive map of over 3,500 completed loft and garage transformations

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Check out our latest transformations on
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A fully glazed gable end on this pitched roof dormer extension adds a stunning feature to the loft conversion, offering beautiful, uninterrupted views of the garden. A fantastic addition to our clients property seamlessly blending style and function!
A fully glazed gable end on this pitched roof dormer extension adds a stunning feature to the loft conversion, offering beautiful, uninterrupted views of the garden. A fantastic addition to our clients property seamlessly blending style and function! #loftconversion #loftconversionspecialists #dormer #conversion #project #veluxwindows #transformation #homedesign #velux #homeimprovement #loftroom #chepstow
What a fantasic finish to this attic loft conversion, creating a stunning retreat to unwind and relax. Feature Velux windows over the free standing bath and nook area utilsed as an ideal reading spot.
A beautifully finished set of pitched roof dormers perfectly complements the property’s original character and charm. Thoughtfully designed to blend seamlessly with the existing architecture, these dormers add a stylish touch without compromisi
A beautifully finished set of pitched roof dormers perfectly complements the property’s original character and charm. Thoughtfully designed to blend seamlessly with the existing architecture, these dormers add a stylish touch without compromising the home’s authentic feel. By enhancing natural light and expanding the usable space, this addition has transformed the loft into a stunning new area while staying true to the home’s aesthetic. Ready to enhance your home’s potential? Contact Allied Welsh at 0800 458 3334 or visit www.alliedwelsh.co.uk to start planning your dream transformation!
Fantastic master bedroom created through a loft conversion with a rear dormer extension! This stunning space features large windows on either side of the proposed bed location and three Velux windows at the front, flooding the room with natural light
Fantastic master bedroom created through a loft conversion with a rear dormer extension! This stunning space features large windows on either side of the proposed bed location and three Velux windows at the front, flooding the room with natural light. Paired with a spacious shower room (featured in our previous post), this transformation has turned an unused attic into a luxurious master suite, enhancing both the living space and property value for our client. #loftconversion #loftconversionspecialists #dormer #conversion #project #veluxwindows #transformation #homedesign #velux #homeimprovement #loftroom #stalbans
Just wrapped up a stunning, spacious, and light-filled shower room that’s ready for decorating! This beautiful space sits alongside a massive new bedroom, transforming the attic into an unbelievable master suite. Stay tuned—photos of the
Just wrapped up a stunning, spacious, and light-filled shower room that’s ready for decorating! This beautiful space sits alongside a massive new bedroom, transforming the attic into an unbelievable master suite. Stay tuned—photos of the bedroom to follow... #loftconversion #loftconversionspecialists #conversion #loft #ensuite #project #transformation #homedesign #velux #homeimprovement #loftroom #transformationtuesday #bathroomdecor #interiordesign #loftbedroom #masterbedroom #veluxwindows #loftensuite #bathroomgoals #luxuryliving
It's been a busy few months, and we're excited to share a new project update! Here's a glimpse into a recent dormer loft conversion, where we transformed attic space into two stunning bedrooms and a shower room. The design utilizes the front gable t
It's been a busy few months, and we're excited to share a new project update! Here's a glimpse into a recent dormer loft conversion, where we transformed attic space into two stunning bedrooms and a shower room. The design utilizes the front gable to create a cozy nook with a triangular window, framed by Velux windows on either side. At the rear, a spacious flat-roof dormer opens up to a generous bedroom with a large feature window and an adjacent shower room. Interested in maximizing your attic's potential? Get in touch to see how we can help bring your ideas to life. We offer a complimentary, fixed-price quote—call us at 0800 458 3334 or visit www.alliedwelsh.co.uk to start your transformation journey.
Fantastic to see a recently finished project from a fresh perspective! Featuring a dormer extension and complete re-roof, bringing new life and functionality to the space #dormer #loftconversion #loftconversionspecialists #conversion #project #roofi
Fantastic to see a recently finished project from a fresh perspective! Featuring a dormer extension and complete re-roof, bringing new life and functionality to the space #dormer #loftconversion #loftconversionspecialists #conversion #project #roofing #transformation #homedesign #velux #homeimprovement #loftroom #loftbedroom #masterbedroom #veluxwindows #homedesign #homegoals #porthcawl
Pleased to share one of our latest projects—a breathtaking loft conversion in a beautiful converted chapel. This unique transformation has created two fantastic bedrooms while preserving the chapel’s historic charm. We retained the origi
Pleased to share one of our latest projects—a breathtaking loft conversion in a beautiful converted chapel. This unique transformation has created two fantastic bedrooms while preserving the chapel’s historic charm. We retained the original king post trusses, adding a touch of timeless elegance to the space. The bespoke hardwood stairs were custom-crafted for both style and durability, seamlessly blending modern comforts with historic features. Swipe through to see the fantastic outcome and let us know what you think in the comments! #LoftConversion #HistoricHomes #HomeRenovation #InteriorDesign #BespokeStairs #KingPostTrusses #DreamHome #loftconversionspecialists #conversion #project #transformation #homedesign #velux #homeimprovement #loftroom #loftbedroom #masterbedroom #veluxwindows #homedesign #homegoals
Back with some more progress photos on this project, following on from our recent structural completion update. Our fitting team have since fully insulated and plasterboarded the entire loft ready for our plastering team to take over! Externally the
Back with some more progress photos on this project, following on from our recent structural completion update. Our fitting team have since fully insulated and plasterboarded the entire loft ready for our plastering team to take over! Externally the dormer windows have been installed and dormer cladding completed, along with all lead and roofing works. #loftconversion #loftconversionspecialists #dormer #conversion #project #veluxwindows #transformation #homedesign #velux #homeimprovement #loftroom #stalbans
Velux loft conversion and full slate re-roof. A combination of four velux windows on the rear creating a fantastic feature internally that also floods the room with natural light. #loftconversion #loftconversionspecialists #conversion #project #tra
Velux loft conversion and full slate re-roof. A combination of four velux windows on the rear creating a fantastic feature internally that also floods the room with natural light. #loftconversion #loftconversionspecialists #conversion #project #transformation #homedesign #velux #homeimprovement #loftroom #loftbedroom #masterbedroom #veluxwindows #homedesign #homegoals #cardiff
A fully glazed gable end on this pitched roof dormer extension adds a stunning feature to the loft conversion, offering beautiful, uninterrupted views of the garden. A fantastic addition to our clients property seamlessly blending style and function!
What a fantasic finish to this attic loft conversion, creating a stunning retreat to unwind and relax. Feature Velux windows over the free standing bath and nook area utilsed as an ideal reading spot.
A beautifully finished set of pitched roof dormers perfectly complements the property’s original character and charm. Thoughtfully designed to blend seamlessly with the existing architecture, these dormers add a stylish touch without compromisi Fantastic master bedroom created through a loft conversion with a rear dormer extension! This stunning space features large windows on either side of the proposed bed location and three Velux windows at the front, flooding the room with natural light Just wrapped up a stunning, spacious, and light-filled shower room that’s ready for decorating! This beautiful space sits alongside a massive new bedroom, transforming the attic into an unbelievable master suite. Stay tuned—photos of the It's been a busy few months, and we're excited to share a new project update! Here's a glimpse into a recent dormer loft conversion, where we transformed attic space into two stunning bedrooms and a shower room. The design utilizes the front gable t Fantastic to see a recently finished project from a fresh perspective! Featuring a dormer extension and complete re-roof, bringing new life and functionality to the space #dormer #loftconversion #loftconversionspecialists #conversion #project #roofi Pleased to share one of our latest projects—a breathtaking loft conversion in a beautiful converted chapel. This unique transformation has created two fantastic bedrooms while preserving the chapel’s historic charm. We retained the origi Back with some more progress photos on this project, following on from our recent structural completion update. Our fitting team have since fully insulated and plasterboarded the entire loft ready for our plastering team to take over! Externally the Velux loft conversion and full slate re-roof. A combination of four velux windows on the rear creating a fantastic feature internally that also floods the room with natural light. #loftconversion #loftconversionspecialists #conversion #project #tra

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