How Long Does A Typical Home Extension Take To Build

Planning a home extension is an exciting step, whether you need extra living space, a bigger kitchen, or a new home office. One of the most common questions homeowners ask is how long the project will take from start to finish. The answer depends on the size and complexity of the extension, as well as planning and preparation, but understanding the typical timescales can help you plan ahead and manage expectations.

Factors That Influence the Timeline of a Home Extension

While every project is unique, most extensions follow a similar structure. The duration will vary depending on the design, materials, and whether unforeseen issues arise, but knowing the stages gives you a good sense of how long the process takes.

Planning and Approvals

Before construction begins, planning applications and approvals need to be addressed. For some extensions, permitted development rights mean formal planning permission isn’t required, but more complex projects often need approval. This stage typically takes between 8 to 12 weeks, depending on local authority processes and whether amendments are needed.

Groundworks and Foundations

Once permissions are in place, work starts on site. Groundworks involve clearing the area, preparing the soil, and laying the foundations. This process usually takes 2 to 4 weeks depending on the ground conditions and size of the extension. Good foundations are critical to the strength and durability of the entire structure, so this stage can’t be rushed.

Building the Structure

With foundations complete, the walls and framework are built. This stage includes brickwork, blockwork, or timber framing, depending on the design. For a single-storey extension, this may take 3 to 6 weeks, while a two-storey extension can take longer. Weather conditions and material availability can also influence this stage.

Roofing and External Works

Once the structure is up, the roof is added, followed by windows, doors, and external finishes. At this point, the extension is weatherproof and secure. Roofing and external works generally take 2 to 4 weeks.

Internal Work and Finishing

The inside of the extension requires plumbing, electrics, plastering, flooring, and decoration. This stage can be the most time-consuming, typically taking 4 to 8 weeks depending on the complexity. Kitchens, bathrooms, or bespoke features add to the timeline but ensure the space is tailored to your needs.

Final Inspections and Handover

Before the extension is complete, inspections are carried out to confirm it meets building regulations. Any final adjustments are made, and the space is handed over to you ready for use. This stage usually takes 1 to 2 weeks.

Typical Duration of a Home Extension

For a straightforward single-storey extension, the process often takes around 3 to 4 months once building work begins. Larger or more complex projects, such as two-storey extensions or those requiring extensive structural changes, can take 6 months or more. By working with an experienced builder, you can ensure realistic timelines and minimise unexpected delays.

Home Extensions in Wigan, Warrington, Bolton, and Worsley

MKW Builders provides professional home extension services, guiding you through every stage of the process. From planning and groundworks to finishing touches, our team delivers quality results you can rely on. Call us today on 01204358908 or fill out our contact form to discuss your extension project.

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