Interior designer or decorator? Which one you need, and why
The two words get swapped all the time, and in Britain one of them can bring a painter to your door. Here’s the difference, and what each will cost you.
Rachel Hannah
Interior designer or decorator? It’s one of the first questions people ask when a room isn’t working, and it’s a fair one, because the two words are used as if they meant the same thing. They don’t, quite. Knowing the difference saves money, and it means you hire the right person for the job you actually have.
The short answer
An interior designer plans how a space works: the layout, where the furniture goes, the lighting, and often the bones of the room, such as joinery or a new kitchen. A decorator works on how a finished space looks: colour, fabrics, furniture and the final styling. Many designers do both. Most decorators stick to the second.
What an interior designer does
The Society of British and International Interior Design (SBID) describes an interior designer as “responsible for the layout of the internal space”. The National Careers Service says designers advise on the use of space, colour schemes, fabrics, fittings and furniture, and can draw up instructions for builders or manage a project from start to finish.
In practice that means measured floor plans, furniture layouts drawn to scale, lighting plans, and decisions about what goes where before anything is bought. It’s the right choice when a room has a problem to solve: an awkward shape, a kitchen that doesn’t flow, a living room that never feels cosy however many cushions it gets.
What an interior decorator does
A decorator dresses a space that already works. SBID notes that decorators don’t need to know building regulations, and usually style a room once any building work is done. Think paint colours, curtains and blinds, rugs, furniture, art and accessories, all chosen to pull a room together.
One very British word of warning. Ask around for a decorator here and you may well be sent a painter and decorator, a skilled trade that paints and papers walls, rather than someone who chooses the scheme. Both are worth having. They’re just not the same thing.
Is either one a protected title?
No. The British Institute of Interior Design (BIID) says plainly that there is no statutory regulator of interior designers in the UK, so anyone can use the title, whatever their training. The word architect is protected by law, which is different. So look at a designer’s finished work, their training and what they promise in writing, rather than the title alone.
What each costs in the UK
A painter and decorator
MyJobQuote, updated in September 2026, puts painter and decorator day rates at about £150 to £250 outside London, and £250 to £350 in London.
An interior designer
Whito’s October 2026 guide puts interior designers’ hourly rates at about £25 to £150, rising to £180 to £450 for senior designers in London. A day of a designer’s time is about £500 to £1,200. An online design for one room runs from about £195 to £695, and a full-service room, with design, sourcing and oversight, about £2,500 to £5,000.
An interior decorator or stylist
Honestly, there’s no reliable published UK figure. Rates vary so much that the only sensible thing is to ask for a fixed price, in writing, before anything starts.
Which one does your home need?
Choose a designer if
The layout isn’t working, you’re changing a kitchen or bathroom, the room is an awkward shape, you want to know the sofa fits before it arrives, or you’d like the whole home to flow from one room to the next.
Choose a decorator if
The room already works well, and it simply needs colour, softness and the right pieces to make it feel finished.
Choose a painter and decorator if
You know exactly what colour you want, and you’d like it on the walls beautifully.
Where Sunday Ambience sits
I’m an interior designer, working online. Every design starts with a layout drawn to scale from your measurements, then the colour, finishes, lighting and furniture, with a shopping list of real pieces kept to the figure you set. The studio doesn’t manage builders, so you bring the design to life with your own trades, at your own pace.
Room Ambience is £495 for one room, and Sunday Signature is £1,495, with photorealistic visuals of your finished room. There’s more on pricing in How much does an interior designer cost in the UK?
Or simply send me a few photographs and tell me what isn’t quite working. I design everything online, from your photos and measurements, I read every message myself, and there’s no obligation of any kind.