An extension could add £150,625 to the value of your Clapham home



As our families grow bigger the need for more space, be that bedrooms or reception rooms, has grown with it. Also, as our older generation lives longer and nursing home bills continue to rise quicker than a rocket on the 5th of November (the average nursing home bill in the area being £862.50 per week) many families are bringing two households into one larger one.


So, should you move somewhere larger, or extend your Clapham property to make it large enough for you and your family? In some circumstances the choice has been made for you. If you live in an apartment with no garden, there isn’t much of an opportunity of making it larger. But if you have a house with a garden or an attic with sufficient headroom, extending your home becomes a real prospect.


Even if it makes more sense to extend or move, the choice hangs on a number of different dynamics – your future plans, money (both saved and access to finance), in what way you are emotionally attached to your home, the particular area of Clapham you live in and finally, the type/style of house you prefer.


Interestingly, the average British home is 968 sq.ft, which as you can see from the table, is in the middle of developed nations when it comes to the size of a property. Of the 1.11m homes sold in 2016 in England and Wales, the average floor area of the houses was 1,119 sq.ft – that’s about an eighth the size of an Olympic sized swimming pool. Apartments averaged 530 sq.ft that’s just over ten times bigger than an average garden shed. Looking at apartments and houses together, the average size of properties sold in England and Wales 968 sq.ft – are slightly smaller than the European average, and much smaller than households in the US.


So back to the question in hand.. extending does mean you will have a lot of inconvenience whilst the work is being carried out. The location of your Clapham property, the quality of construction, what type of room(s) you want to add, your plot, neighbouring building lines, planning regulations and the overall demand for your type of Clapham home, will make a vast difference to the financial repercussions of extending versus moving.


A medium-sized 270 sq.ft single storey extension (say around 17ft x 16ft) will add on average £150,625 to the value of a property in Clapham


It’s important to note the end result of the extension needs to be a sensible and realistic home. A two bed semi-detached house extended to a four bedrooms with no lawn or driveway, or a home with outsized reception rooms downstairs and miniscule bedrooms upstairs, could be problematic if and when you come to sell your home in the future. Irrespective of whether your strategy is to live in your extended home for a long time, you will want to side-step outlaying a lot of money on costly building work that will make it tougher to sell.


In terms of what it would cost to build an extension, you can expect to pay on average between £140 to £200 per sq.ft, depending whether the extension is a single or double storey extension and other factors including finish and type of extension (note – I have seen it cost a lot more than these figures – so please speak with a builder) … So taking a mid line figure, that same 270 sq.ft extension on your Clapham home would cost on average £55,080.


However, moving means there are substantial costs incurred - Estate Agency fees, Removal Van, Survey Fees, Legal fees and Stamp Duty on the property you are buying. Neither option is the obvious choice and comparing the costs of extending your Clapham home to that of moving is not a stress-free undertaking.


How realistic each option is will probably come down to one thing .. your mortgage provider. You will need a considerable sum of equity in your Clapham home before you can think of increasing your mortgage more, because most lenders will require you to have at least 10% to 20% equity left in your property after the extension or move has been done.


The best advice I can give .. don’t assume anything …. get advice and opinion from builders, mortgage brokers, architects, mortgage people and of course… an agent. Look at your options and make an educated decision with all the superficial and objective facts in front of you.


I hope you enjoyed reading. If you are keen to take things further, be it to start from scratch, or do something a bit more interesting with your current portfolio... Start the conversation on email. I'd love to meet you in person of course at this month's Clapham Property Meet, so do come along. Click here for tickets and more info.

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