You are currently viewing Timeframe For an Extension?

Timeframe For an Extension?

Depending on the dimensions and scope of your extension, per UK architects Resi, it can take anything from 7-15 months (and sometimes plenty longer still).

It seems like there are plenty of hoops to leap through before you have got even laid a brick; wall agreements; planning permissions; architect fees etc. The key is to try and do your homework and set yourself a sensible timeline to urge everything done. you’ll break it down into 5 stages:


Start approaching architects or building designers to speak through your plans, see what’s realistic, affordable and find some drawings together. Always get over one quote.


For most straightforward extensions, allow 2-4 weeks for your designer/architect/builder to supply drawings that may be submitted for planning. It’s going to involve several drafts and site visits or perhaps further design consultations with a structural engineer.


Most council local planning offices should make a call on your planning application within eight weeks. Larger more complex designs can take longer. If you’re building on a shared boundary, you may need a celebration Wall Agreement, which may take one week to three months, betting on how easy or understanding your neighbors are.

While you’re awaiting planning permission, it’s a decent time to start out the tendering process and begin researching several contractors to quote for the build.


Most small domestic builds should take 8-16 weeks to finish. But while it’s advised to feature a ten percent contingency into your financial budget, it’s advisable to try to do the identical to your build timeline. Unforeseen issues can add cost and time to your build.

The only thing you’ll be able to make certain of is – even with the most effective made plans within the world – is that there’ll be hiccups and delays. Builders fall ill, deliveries will be late and unseasonal weather can play havoc with drying times and outdoor work. Once you’ve got chosen a contractor, they’re going to be able to provide you with a more realistic timeline. Your building contract should state a start and completion date, ideally insured with a project schedule. If things do over-run, confirm you’re covered with a set price contract.

What type of timeframe should I actually be observing for an extension?

If only there was a magic wand that might achieve marvels and with one wave could make your beautiful new extension miraculously appear. Unfortunately, planning and building a successful home extension requires lots of preparation, leg work, and time, and plenty of it.

Time to figure out what exactly you wish done; Time to search out builders; Time to induce quotes so finding a time when builders can actually start, and that we haven’t even mentioned the particular build – where anything and everything usually happens. So, how long must you allow a home extension from start to completion?


If you’re not careful – snagging can drag on for weeks if not months as you await a contractor to complete any minor issues. It’s always an honest idea to withhold the ultimate payment to the most contractor until everything is completed to the quality as agreed.

From conception to construction, a decent rule of thumb is to permit 9 to 11 months for an ‘average’ extension. Remember living on site can impede progress, and even once your build is complete, you may have to get your building regulations signed off. Only then are you able to really start to enjoy your new and improved home – but, hopefully, it’ll be definitely worth the wait!

Leave a Reply

This site uses Akismet to reduce spam. Learn how your comment data is processed.