Loft Extensions and Conversions
Loft Extension and Conversion Specialists in Cambridgeshire & Hertfordshire.
Master Builders
Creating valuable living spaces from unused loft areas.
At CB Building Services, based in Royston, we specialise in creating beautifully designed loft extensions and conversions that transform unused roof space into valuable living areas. Serving families across Cambridgeshire and Hertfordshire, we combine years of expertise with innovative design to deliver stunning loft spaces that are both functional and beautiful, whether you prefer a sleek contemporary home office or a traditional family bedroom suite.
Why choose us
Trusted expert builders
- Members of the Federation of Master Builders
- Our accreditations include Gas Safe registration and NICEIC certification.
- TrustMark Approved
- Government-endorsed contractor, we’re committed to quality, reliability, and consumer protection.
- No outsourcing
- The same team that quotes your project will see it through to completion.
- From build to finish
-
From constructing your extension to fitting units, plumbing and electrics.
What we do
From simple bedroom conversions to impressive multi-room suites.
We specialise in every type of loft extension and conversion, from straightforward bedroom conversions that maximise existing headroom to substantial dormer extensions that create spacious family suites. Whether you need a quiet home office to accommodate flexible working or an impressive master bedroom with ensuite bathroom, we bring the same attention to detail and craftsmanship to every project.
- Simple loft conversions
- Dormer extensions
- Hip-to-gable conversions
- Mansard extensions
- Velux roof windows
- En-suite bathrooms
- Home office conversions
- Master bedroom suites
“CB Building Services were brilliant. Charlie was very straightforward to work with and has done a really high quality job of our extension (I’m writing this nearly 2 years after the job was finished and no issues at all). Communication was excellent throughout. Not to mention he kept to it exceeded predicted timescales. We’re very pleased and would highly recommend.”
How we work
From structural calculations to final decoration.
From planning through to final decoration, we manage every aspect of your loft extension and conversion project. This includes structural alterations, installing dormers or roof windows, fitting insulation and plasterboard, installing electrics for lighting and heating, plumbing for bathrooms, and ensuring perfect staircase access. Our experienced team coordinates all trades, maintains clear communication throughout, and ensures minimal disruption to your daily life.
- Structural survey and calculations
- Building regulations approval
- Staircase design and installation
- Dormer construction
- Insulation and thermal efficiency
- Complete fit-out
Helpful advice & latest work
Discover our latest projects and read helpful tips about extending your home.
Blog
Advice for UK homeowners looking to extend and renovate their property.
Seamless Summer Extension
A flawlessly executed project delivered on time, on budget and with exceptional build quality.
Exceptional Kitchen Extension
A beautifully crafted kitchen extension delivered with flawless attention to detail.
Trusted loft extension specialists
Your loft conversion represents excellent value for adding space and property value, which is why we maintain the highest professional standards throughout every project. We are TrustMark approved contractors and we hold all relevant certifications for loft construction, including structural alterations, electrical installations for lighting and heating systems, plumbing for bathrooms and insulation to meet current building regulations.
Ready to unlock your loft's potential?
Contact CB Building Services today for a consultation about your loft extension and conversion project. Let’s create valuable living space that enhances your home and lifestyle.