Understanding the Distinction
The terms "interior designer" and "interior decorator" are often used interchangeably, but they describe different services with different scopes, qualifications, and price points. Understanding the distinction helps you hire the right professional for your project.
What an Interior Designer Does
An interior designer works on the spatial and structural aspects of a home alongside the aesthetic ones. Their scope includes space planning and room layout reconfiguration, material and finish specification for all surfaces, lighting design and electrical layout planning, bespoke joinery and furniture design, coordination with architects, structural engineers, and contractors, procurement management and project scheduling, and building regulation and planning constraint navigation.
Designers working on properties in conservation areas — such as those in Hampstead, Belsize Park, and Highgate — also need to understand Article 4 directions and Listed Building Consent processes, which can restrict even internal alterations.
Many UK interior designers hold qualifications from accredited institutions and may be members of professional bodies such as the British Institute of Interior Design (BIID) or the Society of British and International Design (SBID). See BIID interior designer explained for more on what these memberships mean.
What a Decorator Does
An interior decorator focuses on the visual and cosmetic elements of a space. Their scope typically includes colour scheme selection and paint specification, wallpaper selection, soft furnishing choices — curtains, blinds, cushions, throws — fabric selection for upholstery, artwork and accessory sourcing, and furniture selection from existing retail and trade sources.
A decorator does not typically alter room layouts, design bespoke joinery, specify electrical or plumbing layouts, or coordinate with building trades. They work within the existing structure and layout of a property.
Qualifications and Regulation
Interior design is not a regulated profession in the UK, meaning anyone can call themselves an interior designer. However, designers with BIID or SBID membership have met educational and practice standards. Decorators may hold qualifications from short courses, but there is no equivalent professional body with mandatory entry standards.
This distinction matters when the project involves technical specifications, contractor coordination, or planning constraints. A decorator can make a room look beautiful; a designer can make it function better and look beautiful.
When to Hire a Designer
Choose an interior designer if your project involves changing room layouts or removing walls, a kitchen or bathroom requiring new plumbing or electrical layouts, bespoke joinery such as fitted wardrobes or shelving, a period property where original features need careful integration, a large project spanning multiple rooms, or coordination of multiple trades over several months.
Properties in NW London often fall into this category. A Victorian terrace in /interior-designer-belsize-park that needs its ground floor opened up, a mansion flat in /interior-designer-st-johns-wood requiring a complete kitchen refit, or a detached house in /interior-designer-highgate undergoing a whole-home renovation — all benefit from design-level involvement.
When to Hire a Decorator
Choose a decorator if the rooms are staying in their current layout, you already have a builder handling structural works, the budget is under £10,000 for soft finishes only, or you want help selecting colours, fabrics, and accessories. A decorator is also a sensible choice for rental properties or staging for sale.
Fee Comparison
**Interior designers** typically charge 10–15% of the total project cost, a fixed fee based on scope, or £75–£200 per hour. London-based designers working in premium areas charge at the higher end.
**Decorators** usually charge £40–£100 per hour, a flat fee per room (£500–£3,000), or a commission on purchases (15–25%). The gap reflects the difference in scope and responsibility.
The Overlap Zone
Some projects sit between the two. You may need a designer for the kitchen and bathrooms but only a decorator for the bedrooms. Many designers offer flexible packages to accommodate this. When submitting a project brief through Interior Design Hampstead, describe the full scope so we can match you with the right professional.