What’s the Best Time of Year to Start a House Extension?

Timing your house extension just right can make all the difference between a smooth build and a stressful experience. Whether you're thinking about builder availability, weather conditions or your own calendar, choosing the right season will help you avoid costly delays and disruptions.

Choosing the Right Season for Your House Extension

Weather and Its Impact on Building Progress

Weather conditions are one of the most influential factors in determining when to start your extension. Heavy rain can delay groundwork and exterior works, while freezing temperatures make bricklaying and concrete curing more difficult. In contrast, mild and dry conditions help maintain momentum on site and prevent material damage.

Builder Availability Throughout the Year

Spring and summer are peak seasons for builders, meaning popular contractors are often booked up months in advance. If you're aiming for a specific timeframe, especially in warmer months, it’s wise to confirm your builder’s availability as early as possible to avoid disappointment or premium pricing.

Your Own Schedule and Disruptions

Don't overlook your personal commitments when planning a build. Consider how school holidays, family events, or work obligations might affect your ability to be available for site visits or decision-making. Coordinating construction around a quieter time in your own calendar helps minimise disruption and keeps things moving efficiently.

Why Spring Often Works Best

March through May strikes an ideal balance. The ground is usually thawed, temperatures are moderate, and rain is less likely to interfere with major tasks like laying foundations or setting brickwork. Builders are beginning to ramp up their schedules, so you’re more likely to find available slots before the summer rush.

The Popularity of Summer Projects

June to August is the high season for home extensions. Longer days, dry weather, and warm temperatures are perfect for outdoor work. However, the demand for builders means schedules fill quickly, and you may encounter longer wait times or higher costs unless you've booked well in advance.

Is Winter Ever a Good Option?

Although winter comes with risks like frozen ground and limited daylight, it also offers benefits. Builders may have more flexible availability and offer competitive pricing. If you're working with a highly experienced team who can manage weather challenges effectively, a winter start may actually be advantageous.

Autumn as a Transition Window

September to November can be a great alternative if you’ve missed the summer window. Temperatures remain relatively mild, and weather is still manageable. Early autumn starts may even benefit from end-of-season availability from builders who want to complete projects before year-end.

Start the Design Phase Early

Whatever your preferred start time, begin the planning and design stages early. Obtaining planning permission, refining your ideas, and securing quotes takes time. Starting the design process months in advance ensures you're fully prepared to break ground when the time is right.

Looking for expert help with your house extension in Wigan, Warrington, Bolton or Worsley?

MKW Builders offers reliable, well-planned building services with a focus on quality and communication. Call us on 01204358908 or fill out our contact form to discuss your project and ideal timeline today.

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