Benefits and Disadvantages of a Design and Build Firm For Your House Extension.
Many house extension companies provide a Design and build service to the homeowner
suggesting the ‘one stop shop approach‘. This can seem beneficial at first sight as the design is built to a known
budget rather than the other way around.
Loft conversion specialists are probably the most exploitative of this type of building contract. It can seem
very appealing at first site but it is not a guaranteed method of success.
Many government projects are built this way & most end up still over budget with a bland simple style of
non-engaging building. Building to a price can be good if you can establish with the Designer exactly what you are
getting for your money. However, the Building Designer in this case is not looking after your interests but that of
the builders so you will not be obtaining independent advice.
A design and build house extension company still usually engage external home extension designers but they will
be paying their fee not you or rather you are but it is within the builders quote somewhere (no such thing as a
The other potential downside is that you do not know if you are receiving value for money as you have not
obtained a competitive tender on a pre-agreed design. A home owner often needs time and a selection of options form
their own home extension designer in order to establish the best design for their needs. This important design lead
in time is often missing for the design & build companies.