Choosing your project: build, renovate or extend

Before you spend any money, you need to know exactly what kind of project you have. A clear idea at the start saves time, money and stress later.

By the end, you will be able to name the main types of building work. You will also be able to write a short project brief that explains what you want and why.

The main types of building work

Building work usually falls into a few groups. Each one has different costs, risks and rules.

• A new build means building a home or other building on empty land, often called a plot.
• An extension adds new space to an existing building, such as an extra room or floor.
• A renovation improves or repairs an existing building, for example a new kitchen, roof or wiring.
• A refurbishment is a lighter renovation, mostly new finishes such as paint, floors and fittings.
• A conversion changes how a space is used, such as turning a garage or roof space into a bedroom.

Some projects mix several types. Knowing which ones you have helps you find the right people and the right advice.

Start with your needs, not your wish list

Write down why you want to build or renovate. Do you need more space, a safer home, lower energy bills or a home to rent out? Your reason guides every later decision.

Then separate needs from wishes. A need is something you cannot live without, like a roof that does not leak. A wish is something nice to have, like a larger window. When money runs short, you can cut wishes and protect needs.

Think about the future too. Will your family grow? Will older relatives live with you? Will you sell in a few years? A home that suits the next ten years is often better value than one built only for today.

Look closely at the property or land

The building or plot you start with shapes what is possible. An old house may hide damp, weak walls or unsafe wiring. A plot may have poor ground, steep slopes or no water or power supply.

Before you commit, ask a qualified surveyor or engineer to inspect it. A surveyor checks the condition of a building or land. A structural engineer checks whether walls, floors and foundations can safely carry the weight you plan to add.

Also find out which services reach the site. Services, sometimes called utilities, include water, drainage, electricity, gas and internet. Bringing them to an empty plot can cost a lot and take time.

Write a simple project brief

A project brief is a short document that explains your project to the people who will help you. It does not need to be technical. One or two pages is enough.

Your brief should cover:

• What you want to build or change, and why.
• How many rooms or how much space you need.
• Any must-haves, such as step-free access or a home office.
• Your rough budget and when you hope to finish.
• What you already know about the site, including any problems.

Share the brief with every designer or builder you talk to. This way, everyone prices and plans the same project. You can learn more about each stage on our building and renovating page.

Common mistakes

• Starting with designs before you know your needs. Write your brief first, then talk to designers.
• Skipping an inspection to save money. Always ask a qualified surveyor or engineer to check the site before you commit.
• Planning only for today. Think about how you will use the home in five to ten years.

Key points

• Know which type of building work you have, because each has different costs, risks and rules.
• Separate needs from wishes so you know what to protect when money is tight.
• A short written brief helps every professional understand and price the same project.