If you own a home in London that you want to extend or carry out some structural alterations, you may find, depending on the project that you need or want to use the services of an Architect.

An Architect will give you the benefit of the vast experience he or she has built up during their career and may well come up with ideas that you would never have thought about. They will also help you to avoid errors in a design and they’ll know all about making the most of available space. Most local Architects have a good working relationship with the local planning department and this should mean that any applications are dealt with professionally and without any hiccups.

Step One

Your Architect will start on your project with a feasibility study. You can expect to pay between £600 and £2,000 depending on the budget of your project. The higher your budget costs, the higher the Architect’s fees will be. The feasibility study will include a meeting with you to discuss your own ideas and what you hope to achieve from the project.

Step Two

Plans are then drawn up with design options for you to look at. They can be changed or if you are happy the final design will then go forward for planning permission. The planning application can be in the region of between £850 and £2,500.

Step Three

It will take approximately 8 weeks for a planning decision to be made. If it is successful, the next step is for the Architect to draw up the necessary documents for Building Control Approval. This application will also require a structural engineer to draw up plans for the application. You might be looking at costs of between £1,750 and £4,000 for the Architect as well as the structural Engineers costs which can be anything between £350 and £1,500.

Step Four

The final part will be for the Architect to draw up constructions plans that you will give to your builder, so that the work can begin. These plans can cost between £1,750 and £5,750.


Therefore, a small project with a budget of around £30,000 up to £75,000 will cost between £4,000 and £5,500 and a larger project from £75,000 to £150,00 will be about £6,000 to £8,500 for the Architect. You can also use them to oversee the building project, help you to find a builder and prepare papers for tender. Expect to pay between £60 and £100 pounds an hour for this service.


Always check with your planning department about planning permission. If it isn’t necessary, you won’t have to have an Architect and you can then spend the money on some interior design work to put the wow factor into your completed building work.