Building Contractors London project showing house extension with sandstone patio and bifold doors

Building Contractors London

Over 20 years of experience delivering extensions, loft conversions, renovations, maintenance, and landlord services across London.

Free Site Visit & Quote

Fully Insured & Safety Focused

Our Projects
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Residential →

For homeowners looking to improve, extend, or refresh their property.

Home renovations →

House extensions →

Loft conversions →

Kitchen & bathroom refurbishments →

Painting & decorating →

Commercial →

For offices, shops, developers, and commercial property projects.

Commercial refurbishments →

Office fit-outs →

Retail & hospitality works →

Planned maintenance →

Health & safety compliant works →

Landlords →

For landlords and property managers who want things done properly and fast.

Void property refurbishments →

End of tenancy repairs →

Ongoing maintenance →

HMO refurbishments →

Fast turnaround works →

Modern rear home extension in Tulse Hill SW2 creating a bright open-plan living space with skylights and large sliding doors.
Completed rear home extension in Tulse Hill SW2 featuring a modern open-plan kitchen and living space.

Experienced Building Contractors in London

At Decorators Builders, we are experienced Building Contractors London, bringing together years of expertise across building, maintenance, and renovation. Our work includes new builds, extensions, loft conversions, structural alterations, and complete refurbishments and maintenance.

As trusted Building Contractors London, we understand the expectations of homeowners and take pride in offering a service that is reliable, transparent, and focused on long-lasting results.

Our team of Building Contractors London works closely with architects, structural engineers, and building control to ensure every stage of the project meets the required standards. We are fully insured and manage each job with attention to detail, safety, and professionalism.

Whether you’re modernising a single room or carrying out major building work, our Building Contractors London team is here to guide you through the process and deliver a finish that feels right for your home.

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Our Building Contractors London Services

Professional Building & Renovation Services


We offer a complete range of building services designed to improve, extend, and modernise your property. From structural work to internal finishing, our skilled team manages each stage with professionalism and attention to detail.

  • New Builds – Full construction from foundations to final finishes.
  • Extensions – Rear, side, wrap-around and double-storey extensions designed to add valuable living space.
  • Loft Conversions – Dormer, hip-to-gable, and mansard lofts tailored to your home.
  • Renovations – Full or partial property refurbishments, including layout changes and internal upgrades.
  • Conservatories – Bright, functional spaces built to complement your home.
  • Maintenance – Reliable building maintenance, repairs, and property improvements.
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Victorian rear house extension and garden patio at property refurbishment project in Camberwell SE5
Completed rear extension and garden patio at a Victorian terraced house refurbishment project in Camberwell SE5.

Building Contractors London – Recent Projects

Take a look at some of the exceptional projects we’ve completed. From modern renovations to bespoke extensions, our gallery showcases the quality, craftsmanship, and attention to detail that Decorators Builders brings to every home transformation. See our expertise in action across various locations.

  • Rear home extension in Tulse Hill SW2 with modern flat roof and large sliding doors.
  • Interior of a modern home extension in Tulse Hill SW2 showing open-plan living space with large skylight and kitchen area.
  • Modern rear home extension in Tulse Hill SW2 creating a bright open-plan living space with skylights and large sliding doors.
  • Kitchen extension and modern shaker kitchen installation at a Victorian house in Camberwell SE5 with island and French doors to garden
  • Rear kitchen extension with French doors at Victorian house renovation in Camberwell SE5
  • Victorian living room refurbishment in Camberwell SE5 with restored fireplace, timber floors and bay windows
  • Open plan kitchen extension with island and dining area in a Victorian house refurbishment in Camberwell SE5

Frequently Asked Questions

We understand that starting a building project can come with many questions. Below are some of the most frequently asked questions from our clients, covering everything from our services to project timelines and planning permission. If you have any additional questions, feel free to contact us directly!

We serve clients across West London and nearby areas. If you’re unsure whether we cover your location, send us your postcode and we’ll confirm.

We provide a full range of building and renovation services including new builds, extensions, loft conversions, refurbishments, structural alterations, conservatories, and property maintenance.

Yes. We can provide a free quotation after discussing your project and reviewing any photos, drawings, or visiting the site if needed.

Yes. We can work alongside architects, structural engineers, and building control, and we can support you through the planning process depending on the type of project.

Not always. Some projects fall under permitted development, but it depends on the property and the design. We can advise based on your plans and location.

Timelines vary by scope. As a rough guide:

Extensions: often a few months
We’ll confirm a realistic programme once the scope is agreed.

Renovations: a few weeks to a few months

Loft conversions: typically several weeks

Yes — we are fully insured, and we manage projects with a strong focus on safety and proper site standards.

Yes. Your project is managed with clear communication, and you’ll have a main contact throughout the job from start to completion.

Yes. We can handle the project end-to-end, including structural work, internal finishes, coordination with professionals, and final handover.

Yes. Many of our projects are completed while clients remain living in the property. We plan works carefully to minimise disruption and keep the site safe and tidy.

We’ll discuss your goals, ask for any drawings/photos (if available), then arrange a site visit if needed. After that, we’ll provide a quotation and outline the next steps.

We provide clear quotations with an agreed scope. If changes are requested during the project, we discuss them before proceeding so there are no surprises.