Whenever you embark on a major home improvement project, ranging from a new bathroom to a building extension, one key issue you will have to address at the outset is that of how to manage the work involved.
What is involved
There are a number of things that need to be done:
Plan the work carefully beforehand to make sure that what is eventually completed reflects your prior vision in its entirety
Arrange for all supplies to arrive on site at a time suitable so that those working are not held up by lack of any materials
Make sure the supplies that are bought and paid for are of the right quality and good value
Ensure you have the best tradespeople to do the job, at the right price
Arrange the order of the work so that different trades can carry out individual stage of the work in the right order
Make sure they all understand exactly what you want done, how it must be done and to what standard
Make sure that everyone turns up when they say they will, does the work they say they will, to the standards you expect
Just as an exercise, work out exactly what the stages are in building a new bathroom, from start to finish.
As you can see, this involves a difficult set of interlocking tasks. It takes a lot of time, it is both intellectually and emotionally demanding and requires someone to have a reasonable knowledge – or be willing to learn – about the building process involved in their particular project.
Who might manage this work? There are a number of options:
Use an architect
If you are looking at a major piece of construction, involving a lot of technical detail, you may need an architect. His or her work may involve not only coming up a plan that meets your desired objective, but piloting it through the local authority’s planning stages, preparing a building contract, hiring a builder and then overseeing the work on the site itself right to the end.
The advantage of this is that it should, in theory, mean a professional is taking care of everything for you – in return for a fee. Moreover, most good architects will have a list of good builders they can call on who are able to out their designs into practice.
Also, they should, using their experience, not only be able to price any labour and materials needed far more accurately than you could, but obtain the best rates for them too. So, in theory, you save money too.
How much does this cost?
For a typical loft conversion, think in terms of 12% to 15% of the overall build cost
For a large extension, the cost is more likely to be about 10% to 12%
A complete home might cost about 8% to 12%, depending on the difficulties involved in the build
Can you get an architect to do it for less? Yes: you just ask them to sort out the drawings and the planning application and then either manage the build yourself or bring in the contractor yourself.
If so, you are looking at paying about half of the above amount.
Hire a main contractor
As we have seen, the process of ensuring all trades come in at different times, some of them at staggered intervals, throughout a building project, can be complicated and time-consuming. Getting it wrong can be costly and lead to long delays.
You can hire a main contractor who will take care of all of it, bringing in each sub-contractor as and when he needs them. The advantage is that everything is taken care of for you. The disadvantage is that you are relinquishing control of the project to someone else, who may not have the same vision as you do.
There is also the issue of cost. A main contractor will expect to make money from:
The wage you pay him
A proportion of the labour costs
A proportion of the supplies that he obtains on your behalf
The overall cost can be between 10% and 15% of what the build cost might involve if you were handling everything yourself. This would be in addition to the architect’s fees, assuming an architect were involved right down to the final stages of the project.
Of course, the contractor can still obtain better prices for materials and also for labour than you might be able to find, so you might never see the savings if you did it yourself. Are there cheaper ways?
Yes, you can still use a main contractor but agree that he is responsible only for the labour and build management while you buy the materials. But you would have to ensure that all materials are available on the site as and when they are needed, or risk fracturing your relationship with the main contractor. You would expect to cut between 30 and 40% of the total contractor’s cost in this way.
Do it all yourself
As we have seen, there are many stages involved in the building or home improvement process. You are likely to have to spend several hours a day on managing each stage.
You will also have to be on the site each day for some of the time to address daily concerns as they arise. If you think you can do that, you should expect to save anything up to 25% of the total cost of the project, although 15% is more realistic.
This depends on how good you are at negotiating daily rates with individual tradespeople and what kind of prices you can get for the materials you are buying. The danger is that of getting it wrong, for example not managing costs properly: in that case the project can end up costing more than if you brought in the professionals.


In summary, if you have trouble saving money, then try to pay you first. Find a way to make automatic and be sure your money is not easily accessible.
