Mansard Loft Conversions in Swansea, Neath, Port Talbot and Llanelli

We design and build mansard loft conversions across Swansea, Neath, Port Talbot and Llanelli, helping homeowners create spacious and versatile living areas. By altering the roof structure to form a near vertical rear wall, a mansard conversion provides maximum usable space while enhancing the overall value of your home.

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Transform Your Space With a Mansard Loft Conversion

A mansard loft conversion is the ultimate way to add maximum living space to your home. By altering the roof structure to create a steep 72-degree slope with a flat roof on top, this type of conversion offers full-height rooms and unrivalled design flexibility. At LL Carpentry, we design and build bespoke mansard loft conversions across Swansea, Llanelli, Neath and Port Talbot, helping families create stunning new bedrooms, en-suites, or even multiple rooms within their loft space.

What is a Mansard Loft Conversion?

A mansard loft conversion involves extending the entire rear slope of your roof, replacing the angled roof with a near-vertical wall and flat roof. This creates a significant amount of usable floor space and headroom, making it ideal for master suites, home offices, or additional living areas. Though it usually requires planning permission, a mansard conversion is one of the most rewarding ways to transform your property.

What Are the Benefits of a Mansard Loft Conversion?

Creates the largest possible loft conversion space.

Allows for multiple rooms within the loft.

Customisable design with maximum flexibility.

Transforms your loft into a full new floor or living space.

Ideal for master suits, en-suites or open-plan living.

Adds substantial value to your home.

Transform Your Home

Our Process

Free Survey & Quote – we assess your home and provide a clear, no-obligation quote.

Design & Planning – our team creates a design that maximises space and complies with building regulations.

Build & Fit-Out – accredited by the Federation of Master Builders, we deliver high-quality craftsmanship.

Completion & Handover – a finished mansard loft conversion, ready for you to enjoy.

Frequently Asked Questions About Mansard Loft Conversions

Thinking about a mansard loft conversion in Swansea, Llanelli, Neath or Port Talbot? We’ve answered some of the most common questions our customers ask. If you don’t see your query here, get in touch, we’ll be happy to help.

Mansard conversions are typically more expensive than other types due to the scale of work, but they deliver the most space and long-term value. We provide free, tailored quotes.
Yes, a mansard conversion usually requires planning permission as it significantly alters the roofline. Don’t worry, we’ll handle the entire planning process for you.
On average, mansard loft conversions take around 8–10 weeks, depending on the size and design of the project.
The generous headroom and floor area make mansard conversions perfect for large bedrooms, en-suites, home offices, or even multiple new rooms.
Yes, as the most spacious option, a mansard loft conversion can significantly increase your home’s value, making it one of the best long-term investments.

Measured by Quality, Backed by Reviews

"Lewys and Liam are very efficient carpenters. They cleared my old rotting decking, mended and painted my fence and installed a fairly large amount of composite decking. It looks absolutely beautiful and I'm sure has added value to my home. They are lovely people and very trustworthy to leave alone in your home. Thank you for the excellent job. Caradie James"

Trust Pilot Review by Caradie James
"We just had our dream kitchen from Wren fitted by LL Carpentry. These Guys are professional Polite and punctual. We would highly recommend them to anybody. Andrew and Karen cook."

Trust Pilot Review by Andrew Cook
"Had a new kitchen installed by Lewys and Liam. Can’t speak highly enough of them. Professional, thorough, friendly and knowledgable. No job was too big. Would recommend to anybody!"

Trust Pilot Review by Adam Williams