Why Spring is the Best Time to Start Your Home Extension in Surrey
- clarissa middleton

- 3 days ago
- 2 min read

If you've been putting off that extension project, there's a good reason to get moving this April. Spring in Surrey is genuinely the best time of year to start building work — and not just because of the weather. Here's why, and what you should be doing right now.
The weather works in your favour
Ground conditions in Surrey and Hampshire improve significantly from March onwards. Frost risk drops, ground saturation reduces, and longer daylight hours mean more productive working days on site. For extension work — particularly where we're digging foundations or constructing external walls — this translates directly into better quality work and a more predictable programme.
You'll be in for summer
A typical single-storey extension in Farnham or Guildford takes between eight and fourteen weeks from foundations to completion. Start in April, and there's a realistic chance you'll be enjoying your new kitchen extension or garden room before July. That's a significant quality-of-life win.
Planning and preparation take time — start now
One of the most common mistakes homeowners make is underestimating the lead-in time. Between initial conversations, design, planning permission (usually eight weeks if required), material procurement and scheduling, you're often looking at three to four months before a brick is laid. If your goal is to be in before the end of the year, April conversations become very important.
In North Hampshire and parts of Surrey — particularly around the National Landscape boundaries near Haslemere and Alton — permitted development rights can be more complex. Getting experienced local advice early, from a builder who knows these areas well, can save significant time and frustration.
What does a good extension builder in Surrey actually look like?
We'd encourage any homeowner to ask three questions before appointing anyone. First: are they a member of the Federation of Master Builders? FMB membership means the company has been independently vetted — not just self-certified. Second: do they provide a fully itemised quote, so you can see exactly what you're paying for? Third: have they worked extensively in your area? A builder who has completed projects in Farnham, Guildford, Godalming and Fleet will understand local planning nuances, trusted local trades, and supply chain logistics that an out-of-area firm simply won't.
What types of extension are most popular in Surrey right now?
Kitchen extensions remain the most requested project we see — homeowners want open-plan kitchen-dining-living spaces that connect to the garden. Single-storey rear extensions, wrap-arounds and orangery-style glazed extensions are all popular. We're also seeing growing interest in two-storey side extensions and annexes for elderly relatives or home offices. Whatever the brief, the structural and design principles are similar: careful planning, quality materials, and a build team that treats your home with the same respect they'd give their own.
Ready to talk about your extension project? Visit www.forsythconstructionsurrey.com or give us a call — we offer a free initial consultation with no obligation.





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