Home extension estimated costs
It is important that you establish in your own mind what your
available budget is for your home extension right from the start as your wish list may be unachievable for
the budget or finance you have.
Therefore you need to have some idea of the estimated costs based upon your
requirements. This can be combined with interviewing a number of home extension designers or architects for some
initial advice. Each one should be able to give you an idea of the home extension cost based upon your verbal
description of the intended works.
Another route to obtaining an idea of estimated costs is to consult with a few
builders but many are reluctant to offer a home owner budget costs estimates for a home extension as they do
not know the full extent of your intended works.
Homeowners often forget that any extension work will involve some degree of
repairs, making good, remodelling of the existing house layout or other overlapping works that can be hard to
identify at the very start. Most builders like to price from the detailed building regulations construction
level drawings and specifications rather than some verbal description.
Therefore, do not be surprised if the site visiting builder is unresponsive
or reluctant to discuss costs and those that do will usually get it wrong by a considerable margin. One way
around this is to just ask the builder to estimate the build costs purely for the new built frame of the extension
and exclude client selected items like bathrooms, en-suites, kitchens and other internal remodelling. That
way the site visiting builder should be able to get a better handle on the those costs. You can then add in
the extra costs you think relevant for the home owner selected items.
Some professional bodies (RICS) will publish estimated building costs on per
square metre basis for various types of new build work. These can be difficult to use or locate the correct
information but this is another tool for you to pool all three sets of estimated build costs in order o obtain a
possible average, minimum or maximum cost of your home extension.