What You Need to Know About House Extensions
What is the difference between a self build and a custom build?
It varies quite a bit depending on the size, the spec and how complex the build is. As a rough guide, a single storey extension in the UK typically starts from around £1,500 to £2,000 per square metre, though this can go up for more complex builds or higher end finishes. We'll always give you a detailed, transparent quote so you know exactly what you're paying for before any work begins.
What is permitted development for house extensions?
A self build is where you take on the responsibility of managing the project yourself, sourcing your own contractors and overseeing the build day to day. A custom build is where you work with a builder or developer who manages the process on your behalf, while you retain full control over the design and specification. At Rosedale, we work with both, though most of our clients prefer to have us manage the build so they can focus on the decisions that matter most to them.
Do I need planning permission for a new build?
Yes. Unlike some extensions, a new home build will always require full planning permission before work can begin. The process involves submitting detailed plans to your local planning authority, who will assess the application against local planning policies. It can take several months, so it's worth starting the process early. We work alongside architects and planning consultants who can help guide you through it.
Do I need an architect for a custom build?
In most cases, yes. An architect will help you translate your vision into a set of detailed plans that can be submitted for planning permission and used to guide the build. Choosing the right architect is almost as important as choosing the right builder. We work with a trusted network of architects and are happy to point you in the right direction if you're not sure where to start.
How long does a custom build take?
It varies depending on the size and complexity of the project. As a rough guide, most custom home builds take anywhere from twelve months to two years from breaking ground to handover, though the planning and design stage before work begins can add several months on top of that. We'll always give you a realistic timeline from the outset so you can plan accordingly.
What is involved in the planning permission process for a new build?
The planning permission process for a new build typically involves appointing an architect to draw up detailed plans, submitting a planning application to your local authority and waiting for a decision, which usually takes around eight to thirteen weeks. If the application is approved, you'll also need to satisfy any planning conditions before work can begin. Building regulations approval is a separate requirement and covers the technical standards the build must meet. It sounds like a lot, but with the right people around you it's very manageable.
