Professional House Extensions

Expand your living space with expert extension services across Manchester, Liverpool, Leeds & Cheshire. Single-storey, double-storey, and bespoke extensions by CITB certified contractors.

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Expert House Extension Services

Transform your home and lifestyle with our professional house extension services. Whether you need more space for a growing family, want to add value to your property, or simply desire a more functional living environment, our expert team delivers exceptional results.

From single-storey kitchen extensions to complex double-storey and wrap-around extensions, we handle every aspect of your project with precision and care. Our CITB certified team ensures all work meets building regulations and the highest quality standards.

  • Single-storey extensions
  • Double-storey extensions
  • Wrap-around extensions
  • Kitchen extensions
  • Conservatories & orangeries
  • Planning permission support
Professional house extension services

Types of House Extensions

Choose the perfect extension type to suit your home and lifestyle

Single storey house extension

Single-Storey Extensions

Perfect for expanding ground floor living spaces. Ideal for kitchen extensions, dining areas, or family rooms with seamless indoor-outdoor flow.

  • Kitchen extensions
  • Family room additions
  • Bi-fold doors to garden
  • Open-plan living
Double storey house extension

Double-Storey Extensions

Maximize space with two-storey additions. Add bedrooms, bathrooms, and living areas while maintaining garden space and adding significant value.

  • Extra bedrooms
  • Additional bathrooms
  • Expanded living areas
  • Maximum value addition
Wrap around house extension

Wrap-Around Extensions

Combine side return and rear extensions for maximum space transformation. Create spectacular open-plan living areas with abundant natural light.

  • Maximum space gain
  • Open-plan design
  • Natural light optimization
  • Complete transformation
Modern kitchen extension

Kitchen Extensions

Transform your kitchen into the heart of your home. Modern kitchen extensions with island units, dining areas, and seamless garden access.

  • Modern kitchen design
  • Island and peninsula units
  • Dining integration
  • Garden connectivity
Conservatory and orangery extension

Conservatories & Orangeries

Light-filled extensions that blur the boundary between indoor and outdoor living. Modern glazed extensions with excellent thermal performance.

  • Maximum natural light
  • Garden views
  • Year-round usability
  • Thermal efficiency
Loft extension with dormer

Loft Extensions

Convert unused loft space into bedrooms, offices, or playrooms. Dormer extensions and full loft conversions with modern amenities.

  • Additional bedrooms
  • Home office space
  • En-suite bathrooms
  • Dormer windows

Benefits of House Extensions

Increase Property Value

Well-designed extensions can add 15-25% to your property value, often exceeding the construction cost and providing excellent return on investment.

Avoid Moving Costs

Extend your current home instead of moving. Save on estate agent fees, stamp duty, legal costs, and the stress of relocating.

Better Family Living

Create the space your family needs to grow and thrive. Open-plan living, additional bedrooms, and functional family areas.

Personalized Design

Design your extension exactly how you want it. Custom layouts, premium materials, and finishes that reflect your style and needs.

Before You Start Your House Extension

A successful extension starts long before the first shovel hits the ground. We help you get everything lined up properly.

Things to Get Clear Upfront

  • Budget & priorities: How much you want to invest and what absolutely must be included – extra bedroom, bigger kitchen, open‑plan living, etc.
  • How you use the space: We look at how your family lives day‑to‑day so the new layout genuinely works, not just looks good on paper.
  • Planning constraints: Nearby neighbours, highways, conservation areas and previous extensions can all affect what’s allowed.
  • Living through the work: We plan phasing, temporary kitchens and access so you can stay in the house where possible.

Pre‑Build Checklist

  • Agreed budget range
  • Measured drawings or survey in place
  • Planning / permitted development route confirmed
  • Structural approach agreed with engineer
  • Provisional start date pencilled in

After Your Extension is Complete

Our work doesn’t stop at practical completion – we support you through snagging, warranties and long‑term maintenance.

Snagging & Final Checks

We carry out a detailed snagging inspection with you, agree a list of minor items and complete them promptly so the extension is 100% ready to enjoy.

Paperwork & Sign‑Off

You receive building control completion certificates, electrical and gas certificates, guarantees for key products and a clear record of what has been installed.

Warranties & Aftercare

Structural elements are covered by our warranty, and we remain available for any questions or minor adjustments during the defects liability period.

Living in Your New Space

We can advise on ventilation, heating settings and maintenance to keep your new extension comfortable and looking its best for years to come.

Our Extension Process

From initial consultation to final handover, we manage every aspect of your extension

Planning & Design Phase

  • Initial Consultation: Free site visit to assess your property and discuss your extension requirements
  • Design Development: Architectural drawings and 3D visualizations of your proposed extension
  • Planning Permission: Full planning application service including drawings and submission
  • Building Regulations: Technical drawings and building control approval process
  • Detailed Quote: Comprehensive pricing with full material and labor breakdown

Construction Phase

  • Project Management: Dedicated project manager overseeing all trades and timelines
  • Professional Trades: CITB certified builders, electricians, plumbers, and specialists
  • Quality Control: Regular inspections and quality checks throughout construction
  • Progress Updates: Weekly progress reports with photos and timeline updates
  • Final Handover: Complete project handover with warranties and maintenance guides

Design & Planning

Professional architectural services

Planning Permission

Full application and approval service

Expert Construction

CITB certified professional trades

House Extensions Near Me

We deliver professionally managed house extensions across Manchester, Liverpool, Leeds, Cheshire and the surrounding areas. Find your town or city and view dedicated local extension information.

Local Extension Specialists

Because we work across the North West and Yorkshire every day, we understand local planning policies, typical property types and what adds the most value in your postcode. Whether you are extending a Victorian terrace, a 1930s semi or a modern detached home, our team will design the right solution for your plot and budget.

Use our service area hub to find detailed “house extension near me” information for your location, including example projects and cost guidance.

  • Local planning and building control knowledge
  • Typical costs and build times for your area
  • Examples of recent extensions near you
  • Free, no‑obligation design & build quotes
View House Extension Areas

Popular “Near Me” Locations

  • House extensions in Manchester & Greater Manchester
  • House extensions in Liverpool & Merseyside
  • House extensions in Leeds & West Yorkshire
  • House extensions across Cheshire

If you can’t see your exact town listed, we almost certainly still cover you – just get in touch.

Extension Services Across North West England

House Extensions in Your Area

Our expert extension teams operate across Manchester, Liverpool, Leeds, and Cheshire, bringing local knowledge and expertise to every project.

Manchester & Greater Manchester

Kitchen extensions, double-storey extensions, and wrap-around extensions in Manchester City Centre, Didsbury, Altrincham, Stockport, and all Greater Manchester areas.

Liverpool & Merseyside

Victorian terrace extensions, contemporary additions, and bespoke extensions across Liverpool, Wirral, Southport, and Merseyside.

Leeds & West Yorkshire

Period property extensions, modern family extensions, and commercial extensions throughout Leeds, Bradford, Harrogate, and West Yorkshire.

Cheshire

Luxury extensions, countryside property extensions, and bespoke additions across Chester, Warrington, Macclesfield, and rural Cheshire.

House extension services coverage area across North West England

Planning Permission & Building Regulations

Planning Permission

We handle all planning applications including architectural drawings, planning statements, and liaison with local planning authorities.

Building Regulations

Full building regulations compliance including structural calculations, technical drawings, and building control approvals.

Permitted Development

Many extensions fall under permitted development rights. We assess your project and advise on the most appropriate approval route.

Neighbor Consultation

Professional handling of party wall agreements and neighbor consultations to ensure smooth project progression.

House Extension FAQs

Common questions homeowners ask before starting a house extension project with Building Group.

How much does a typical house extension cost?

As a very broad guide, single‑storey extensions usually start from around £1,500–£2,500 per m², while double‑storey extensions can be £1,800–£3,000+ per m² depending on specification, access and finishes. After a site visit we provide a detailed written quote so you know exactly what’s included.

Do I need planning permission for my extension?

Many extensions fall under permitted development rights, but larger or more complex schemes will need formal planning permission. As part of our service we check your property, advise on the best route and handle the planning application and drawings for you where required.

How long will my house extension take?

A straightforward single‑storey extension typically takes 8–12 weeks on site. Double‑storey and wrap‑around extensions can take 12–16 weeks or more. We issue a clear programme at the start of the project and keep you updated with weekly progress reports.

Can we live in the house while the extension is being built?

In most cases yes. We carefully plan phasing, access, temporary kitchens and protection to minimise disruption. For particularly invasive stages (like steel installation) we’ll let you know well in advance so you can plan around them.

What warranties and guarantees do you provide?

Structural works are covered by our contractor warranty, and you’ll receive manufacturer guarantees for key products such as windows, doors, roofing systems and boilers. We also provide a defects liability period after completion so any minor issues can be put right.

What is the first step if I’m interested in an extension?

Simply get in touch to arrange a free, no‑obligation consultation. We’ll visit your property, discuss ideas and budget, and outline likely planning and build options. After that we can prepare drawings, a detailed quote and a provisional timeline for your project.

Recent House Extension Reviews

Homeowners across Manchester, Liverpool, Leeds and Cheshire trust Building Group to deliver their extensions on time and to a high standard.

★★★★★

"Our single‑storey kitchen extension in South Manchester was finished ahead of schedule and the quality is excellent. The team kept the site tidy and disruption was minimal."

– Sarah W, Didsbury

★★★★★

"Building Group managed the whole double‑storey extension, from planning drawings to final handover. Communication was clear and we always knew what was happening next."

– James P, Liverpool

★★★★★

"Our wrap‑around extension has completely transformed the ground floor. The project manager was on top of every detail and building control sign‑off was smooth."

– Emma & Mark, Leeds

★★★★★

"We were nervous about living through the work, but the team phased the build really well. The new bedroom and en‑suite in our Cheshire home look fantastic."

– Helen R, Chester

Want to read more feedback from extension clients?

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