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Business Details
50+ Years
experience
Expert Loft Conversions in Bristol
C&A Johnson is a family-run loft conversion and extension specialist established in 1963. With over 56 years of experience serving Bristol, Bath, and surrounding areas, we combine traditional craftsmanship with modern techniques to deliver high-quality home improvements. Our team of directly employed tradesmen ensures meticulous attention to detail, supported by continuous project management from initial design to completion.

As long-standing members of the Federation of Master Builders, we offer the Build Assure insurance-backed warranty, reflecting our commitment to reliability and customer satisfaction. Our turnkey service includes free consultations, CAD design, planning permissions, and compliance with building regulations, ensuring a seamless experience tailored to individual client needs.
Services
Loft Conversions Home Extensions Bi-Fold Door Extensions En-Suite Installations Bungalow Conversions
Details
  • Year established: 1963
Highlights and features
  • Tailored design and build service from initial consultation to completion.
  • Turnkey solutions including planning permissions and building regulation compliance.
  • Continuous project management by experienced directors throughout the build.
  • Directly employed, qualified tradesmen ensuring high-quality craftsmanship.
  • Insurance-backed warranty through the Federation of Master Builders.
Associations and certifications
  • Federation of Master Builders
What people say
Excellent service High-quality workmanship Professional team On time and budget Personal service
Services
Loft Conversions
We specialise in transforming unused roof spaces into functional living areas. Our loft conversions maximise space while maintaining structural integrity, offering solutions for Victorian terraces, semi-detached homes, and bungalows. Each project includes free design consultations, CAD drawings, and compliance with building regulations, ensuring a seamless process from survey to completion.
Home Extensions
Our home extensions create additional living space tailored to your needs. Whether single or two-storey, we handle planning permissions, structural calculations, and building regulations. Using directly employed tradesmen, we ensure quality craftsmanship and minimal disruption, delivering extensions that enhance property value and functionality.
Bi-Fold Door Extensions
Bi-fold door extensions connect indoor and outdoor spaces, ideal for kitchens or dining areas. We design thermally efficient extensions compliant with building regulations, using high-quality materials. Our service includes 3D design plans and installation, ensuring natural light and seamless integration with existing structures.
En-Suite Installations
We install en-suite bathrooms as part of loft or home extensions. Our team ensures compliance with plumbing standards, offering bespoke designs to maximise space. Certified gas and electrical contractors handle installations, providing full certification for safety and regulatory compliance.
Bungalow Conversions
Bungalow conversions add significant living space without altering the original structure. We assess roof height and design dormer or Velux solutions to create bedrooms or living areas. Projects include full project management, ensuring minimal disruption and adherence to building regulations.
Questions
Do you offer a complete loft conversion service?
Yes, we provide a full service from free consultation and CAD design to planning permissions and final build, ensuring compliance with building regulations.
Is a deposit required?
No deposit is needed. Payment begins after signing the contract, covering administration costs like drawings and local authority fees.
Do you use subcontractors?
We primarily use directly employed tradesmen, with only scaffolding, electrical, and heating work subcontracted to trusted, certified partners.
Do I need planning permission?
Not always. Single-storey extensions often don't require it, but two-storey projects do. We handle all necessary applications during the design phase.
Will there be dust during the build?
Some dust is inevitable, but we minimise disruption by scheduling invasive work late and using protective measures like dust sheets.
Do you offer a warranty?
Yes, we provide a Masterbond insurance-backed warranty and address any post-completion issues promptly.