Looking for house extension builders in Altrincham? KJL Builders specialises in designing and building high-quality home extensions across Altrincham and the North West.
With years of experience delivering house extensions across Altrincham and the North West, our skilled team manages every stage of the project — from planning and design to construction and completion.
Whether you need a larger kitchen, additional bedrooms, a home office, or a modern open-plan living area, we create extensions that blend seamlessly with your existing property.
Call us today on 07549997985 for a free consultation and quote.
Altrincham features a mix of attractive property styles, from traditional Victorian terraces and period semi-detached homes to modern family houses and new developments. At KJL Builders, we regularly design and build high-quality house extensions across Altrincham that complement the character of the existing property while adding valuable living space.
Whether it’s extending a period home in areas like Hale or Timperley, creating a larger kitchen extension in Bowdon, or adding a double storey extension to a growing family home in Altrincham itself, our experienced team delivers results that are tailored to local properties and lifestyles. Every extension is carefully planned to maximise space, improve natural light, and create a seamless connection between the original home and the new living area.
Call us today on 07549997985
Experienced Extension Builders in Altrincham
Choosing the right builder is essential when planning a home extension. At KJL Builders, we provide a complete service designed to make your project smooth and stress-free.
Our team works closely with homeowners in Altrincham and surrounding areas, delivering extensions that are practical, stylish, and built to last.
Why Choose KJL Builders?
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Experienced house extension specialists
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Fully managed projects from start to finish
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High quality workmanship
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Transparent pricing with no hidden costs
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Local builders serving Altrincham and the North West
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Tailored designs to suit your home and lifestyle
Our goal is simple: to build beautiful, functional spaces that enhance how you live.
Single Storey House Extensions in Altrincham
A single storey extension in Altrincham is one of the most popular ways to expand your home. Perfect for creating larger kitchens, open-plan living spaces, dining areas, or home offices.
Benefits include:
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Increased ground floor space
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Improved natural light
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Seamless indoor-outdoor living
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Ideal for modern kitchen extensions
Double Storey House Extensions in Altrincham
A double storey extension in Altrincham significantly increases both ground and upper floor space.
This option is ideal if you need:
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Additional bedrooms
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Extra bathrooms
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Larger living areas
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A complete home layout transformation
Double storey extensions provide excellent value because they maximise space while sharing structural costs.
Rear Kitchen Extensions in Altrincham
A rear extension in Altrincham expands the back of your home, creating larger living areas or open-plan kitchens that connect to the garden.
Rear extensions are perfect for homeowners who want to:
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Create open-plan kitchen-dining spaces
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Improve natural light with bi-fold doors
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Extend living areas without reducing front space
Side Return Extensions in Altrincham
A side return extension in Altrincham uses the narrow space beside your property to extend the kitchen or living area.
These are particularly popular with:
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Terraced houses
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Semi-detached homes
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Properties with unused side space
This extension type can dramatically improve layout and functionality.
Wrap Around Extensions in Altrincham
A wrap-around extension in Altrincham combines rear and side extensions to create a large open living space.
This option completely transforms the ground floor and is ideal for:
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Large open-plan kitchens
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Family living areas
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Modern home layouts
How Much Does a House Extension Cost in Altrincham?
One of the most common questions we get is:
“How much does a house extension cost in Altrincham?”
While every project is different, a typical extension in the UK generally ranges between:
£2,500 – £3,000 per square metre
The final price depends on several factors.
Factors That Affect Extension Costs:
Size of the Extension
Larger extensions require more materials, labour, and time, increasing overall costs.
Type of Extension
Single storey extensions usually cost less than double storey or wrap-around extensions.
Materials and Finishes
High-end materials, bespoke features, and premium finishes will increase the total budget.
Design Complexity
Architectural features, structural changes, and complex layouts require additional work and expertise.
Location and Site Conditions
Access, ground conditions, and local regulations can also impact the cost.
Here are some rough examples based on the typical £2,500 – £3,000 per m² range.
Small Single Storey Extension (20m²)
Estimated cost: £50,000 – £60,000
Ideal for kitchen or dining room expansions.
Medium Double Storey Extension (40m²)
Estimated cost: £100,000 – £120,000
Perfect for adding bedrooms and expanding living areas.
Large Wrap Around Extension (60m²)
Estimated cost: £150,000 – £180,000
Great for full ground floor transformations and open-plan living.
For an accurate estimate, we recommend requesting a personalised quote based on your property and design requirements.
At KJL Builders, we follow a clear and structured process to ensure your project runs smoothly from start to finish.
Initial Consultation
We begin by discussing your ideas, goals, and budget. This helps us understand exactly what you want from your extension.
Design and Planning
Our team works with architects and designers to create a layout that complements your home. We also assist with planning permission and building regulations if required.
Detailed Quotation
You’ll receive a clear and transparent breakdown of costs, including materials, labour, and timelines.
Material Selection
We help you choose the best materials and finishes to match your vision and ensure durability.
Construction
Our experienced builders handle every stage of the build, maintaining high standards of workmanship throughout.
Quality Checks
Regular inspections ensure your extension meets our strict quality standards.
Project Completion
Once construction is complete, we walk through the finished project with you to ensure everything meets your expectations.
Aftercare Support
Even after the build is finished, we remain available for any support or advice you may need.
House Extension Builders Serving Altrincham and Surrounding Areas
Example House Extension Costs in Altrincham
Our House Extension Process
House Extension Altrincham FAQ
How much does a house extension cost in Altrincham?
House extensions in Altrincham typically cost between £2,500 and £3,000 per m², depending on size, design, and materials. Contact us for a personalised quote.
Do I need planning permission for a house extension?
Some extensions fall under permitted development, meaning planning permission may not be required. We can advise you and help with the planning process if needed.
How long does a house extension take to build?
A typical single storey extension takes around 8–12 weeks, while larger extensions may take 3–5 months depending on the project.
Will a house extension add value to my home?
Yes, a well-designed extension can increase both living space and property value, especially in desirable areas like Altrincham.
What type of house extension should I choose?
Popular options include single storey, double storey, rear, and wrap-around extensions. The best choice depends on your property and needs.
Do you manage the entire extension project?
Yes, we provide a fully managed service including design, planning support, construction, and completion.
Recent House Extension Project in Altrincham
A recent house extension project we completed in Altrincham involved expanding a detached family home to create a much larger and more functional kitchen and living space. The homeowners wanted to modernise the ground floor layout and introduce a brighter open-plan area where the family could cook, dine, and spend time together.
Our team constructed a spacious rear extension that allowed for a modern kitchen, dining area, and additional seating space overlooking the garden. Large sliding doors and roof lanterns were incorporated to bring in plenty of natural light and create a strong connection between the indoor space and the outdoor patio area.
The project was completed in approximately 11 weeks and delivered a completely transformed living environment for the homeowners. Extensions like this demonstrate how a thoughtfully designed house extension in Altrincham can dramatically improve everyday living while also increasing the value of the property.
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KJL Builders recently completed our rear kitchen extension in Altrincham (WA14) and we couldn’t be happier with the result. The team were professional from start to finish and kept us informed throughout the project. The new open-plan space has made a huge difference to our home.
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We used KJL Builders for a double storey extension at our home in Hale near Altrincham (WA15). The whole process was well organised and the work was completed to a very high standard. The extra bedrooms and larger living area have completely transformed the house.
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Great experience working with KJL Builders on our single storey extension in Timperley (WA15). The builders were friendly, reliable and the workmanship was excellent. The new kitchen and dining space looks fantastic and has added so much value to our property.