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House Extensions in Manchester

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Let’s Build Your Vision

“Have a Vision? We Build It Together.”

Reliable Builders Ltd specialises in creating beautiful house extensions across Manchester, combining decades of construction expertise with practical design solutions. Whether you’re looking to add a kitchen extension, create an open-plan living space, or build a double-storey addition, our experienced team manages every aspect of the project — from initial planning through to final handover.

Types of Extensions We Build

We cover the full range of domestic extension types across Manchester, including:

  • Single-storey rear extensions
  • Double-storey extensions
  • Side return extensions
  • Wrap-around extensions
  • Over-structure extensions above garages
  • Loft conversions

Every Manchester property is different — from Victorian terraces in Chorlton to semi-detached homes in Sale and Didsbury. We tailor every design to complement your existing architecture whilst giving you the additional space your family needs.

New Build Homes in Manchester

As well as extensions, we undertake full new build projects across Greater Manchester. We handle everything from initial site surveys and architectural planning through to final handover and aftercare. Our comprehensive service includes liaising with architects, structural engineers, and local planning authorities to ensure your project meets all building regulations and planning requirements.

We pride ourselves on delivering new homes that reflect modern living standards whilst respecting the character of Manchester’s diverse neighbourhoods.

Planning Permission — We Handle It All

Navigating planning permission can feel overwhelming, but we take care of the entire process for you. Our local Manchester knowledge means we understand exactly what the council requires, and we manage all submissions and correspondence on your behalf. Many single-storey rear extensions fall under permitted development and don’t require full planning permission — we’ll advise you clearly from the outset so there are no surprises.

Our Extensions Process

Every project starts with a detailed consultation to understand your vision, budget, and timeline. From there we provide a full written quote with a realistic construction schedule. We coordinate all trades — groundworkers, bricklayers, roofers, electricians, and plasterers — so you have one point of contact throughout.

All our extensions use quality brickwork matched precisely to your existing property. If your extension requires a new roof structure, our Manchester roofing team handles that as part of the same build. Once the structure is complete, we can also lay a matching patio or driveway to finish the outside space properly.

Why Choose Reliable Builders for Your Extension?

With over 50 years serving Manchester homeowners, we’ve completed hundreds of extensions across the city. Our reputation is built on honest pricing, realistic timelines, and work that genuinely lasts. Every extension is backed by our full workmanship guarantee and we’re fully insured for all structural construction work.

Do I need planning permission for a house extension in Manchester?

Many single-storey rear extensions fall under permitted development rights, meaning you don’t need full planning permission. However, the rules depend on the size of the extension, your property type, and whether your home is in a conservation area. Double-storey extensions and side extensions closer to a highway almost always require planning permission. We assess every project upfront, advise you on exactly what’s needed, and manage the full planning application on your behalf if required.

How much does a house extension cost in Manchester?

A single-storey rear extension in Manchester typically costs between £20,000 and £45,000 depending on size, specification, and finishes. Double-storey extensions generally start from £40,000 upwards. These figures include all structural work, roofing, windows, and basic internal finishes. We provide fully itemised written quotes so you know exactly where every pound is going before work begins. We’re happy to work within a set budget and advise on where to prioritise spend.

How long does a house extension take to build?

A typical single-storey extension takes between 8 and 12 weeks from breaking ground to practical completion. Double-storey extensions usually take 12–20 weeks. This doesn’t include the planning and design stage, which can add 8–12 weeks if a full planning application is required. We provide a detailed programme of works at the start of every project and keep you updated weekly so you always know where things stand.

Will I need to move out during the extension build?

In most cases, no. The majority of extension projects allow you to remain in your home throughout the build. We work carefully to minimise disruption, maintaining access to key rooms and securing the site at the end of each working day. For larger or more complex builds where structural work affects the main living area, we’ll discuss this with you in advance and plan the build sequence to reduce inconvenience as much as possible.

Do you handle building regulations approval for extensions?

Yes. Building regulations approval is separate from planning permission and is required for almost all extension work. We submit all necessary applications, coordinate with the building control inspector at each key stage — foundations, structural frame, roof, insulation — and obtain the completion certificate at the end. This is an important document if you ever come to sell your property, and we make sure it’s always in place.

Can you match the brickwork on my existing property?

Absolutely — brick and mortar matching is something we take seriously on every extension project. We source bricks from a wide range of suppliers to find the closest match to your existing property, and we replicate the original pointing style and mortar colour. For older Manchester properties with hard-to-match Victorian or Edwardian brickwork, we have experience sourcing reclaimed materials where needed.

Do you offer a guarantee on extension work?

Yes. All extension and new build work carried out by Reliable Builders Ltd is backed by our full workmanship guarantee. We’re also fully insured with public liability cover for all structural construction. If any issues arise from our work after completion, we return to put them right at no additional cost. Our aftercare service means you’re not left on your own once we’ve packed up — we remain your point of contact for any follow-up questions or concerns.

What areas of Manchester do you cover for extensions?

We carry out house extension projects across Greater Manchester including Stretford, Sale, Altrincham, Chorlton, Didsbury, Salford, Trafford, Wythenshawe, Eccles, and Stockport. If you’re unsure whether we cover your area, give us a call on 0161 506 8790 and we’ll be happy to confirm.