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Interior Designer Clair Strong shares the top 20 interior design rules she swears by when designing a home

As an interior designer my job is to help you make your space look its best while reflecting your personal sense of style. Done well and you’ll end up with a beautiful, functional home that makes you feel happy every time you open the front door. Done badly and your home could end up a mix of furniture, fabrics and paint colours that don’t work together and make you feel stressed. I have some rules I swear by that will help you create your perfect home. Although my biggest tip is to use an interior designer to help you with your project! 

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Clair Strong 


Start with measuring 

Before you start designing, measure the length, width and ceiling height of every room. It’s also a good idea to measure window openings and doorways. Having these measurements to hand will help you with everything from how much paint to buy, to fabric requirements for window dressings, and ordering things like flooring, radiators and even light fittings. It will also make sure you don’t buy furniture that’s too big (or small) for your space or that won’t fit through doorways. 


Create a floorplan

Interior designers always start with a floor plan. It’s simple to do at home; just transfer your measurements onto some graph paper with a pen and ruler. I use specialist CAD programmes and can provide 2D furniture layouts, room elevations and 3D perspective drawings so you can really know the space. 


Once you have a floorplan, you can start experimenting with the placement of furniture. Draw the furniture to scale to match the size of your floorplan.

Create a mood board

For interior designers a mood board is the go-to tool for the initial planning phase of a space. It helps me visually communicate my ideas to my clients and make sure that my choices of furniture, paints and fabrics work well together.


Gather all your decorating ideas together. These can be images torn from magazines, natural materials, fabric swatches, paint samples, wallpaper samples, images from interiors brochures, tiles or pieces of flooring and paint samples. Stick them all in a large A3 sketchpad so you have all your

ideas and inspiration together in one place. Now you can see what works and what doesn’t to help you plan your scheme.

Have a theme to pull your scheme together

If you have a pattern or a colour that you carry through from room to room, your home will look more cohesive. It could be a colour or pattern that runs through each room or a material or wood. It will make your home look more considered and stylish. 


Imagine how this might look – perhaps a home with a dark navy kitchen in an otherwise white room, blue velvet sofas in a dark moody room, China blue walls and marble in a zen-like bathroom and a sky blue and pink bedroom. 

Plan storage early

Make every inch of each room work hard with clever and space-saving storage solutions and you will create a harmonious home.


Shelving in alcoves, built in wardrobes, dressing rooms and cubbyholes in the bathroom wall will all create space in your home. Design a new kitchen with storage solutions in mind. Build cupboards up to the ceiling and think about a bespoke utility area or larder cupboard. 


Create a focal point in every room

Every room should have a focal point so think about whether you are drawing your eye to the right place in each room. Typical focal points are fireplaces, mirrors, artwork, windows or the TV!  Focal points tend to be at eye level to attract the attention of the viewer so move things around to create the most interesting effect. If all your furniture is facing the TV, move it around to face the fireplace. If you have a beautiful garden, make sure your furniture is arranged to appreciate the view. 


If a room doesn’t have a focal point, you need to create one.  A stunning headboard in the bedroom, a dramatic piece of artwork in the hallway or an elegant mirror in the bathroom can all be beautiful focal points that give your room drama and style. 


Pay attention to lighting

Lighting in a room isn’t just functional; it can add a beautiful design element to your space too. Whether you are looking at under cabinet LED lights in your kitchen, adding some mood lighting in the sitting room or installing a statement chandelier in your hallway, don’t underestimate the power of changing your lighting. A backlit mirror, a picture light over a statement piece of art or dimmer switches in the kitchen can make a huge difference to the atmosphere of a room. Lamps aways create interesting lighting in a room.


Use the 60-30-10 rule

The 60-30-10 rule is a timeless rule to use to make sure your colour palette is balanced. 


The 60% is the main colour in a room like the walls or floors. This colour anchors the space and acts as a backdrop for the other colours in the scheme.


The secondary colour takes up 30% of the space and supports the main colour but is different enough to set give the room interest. It could be your curtains or sofas, for instance.


The accent colour is the boldest shade and takes up 10% of the space. For a living room, this could be your cushions or in a bedroom the lampshades. 

Focal points tend to be at eye level to attract the attention of the viewer so move things around to create the most interesting effect.

Embrace the power of colour

When choosing colours remember that colours create a mood. Greens are soothing colours, reds are passionate, yellows are uplifting, and pinks are delicate and feminine. 


Colours are also warm or cool. In our minds, we perceive reds, oranges, and yellows as warm like the sun and fire and blues and green as cool because they remind us of water, sky, and trees. A mix of cool and warm colours often creates balance in a colour scheme.

You should always consider the shape of the space, the quality of light and the function of the space when deciding which colour is best.

Our grey UK climate suits cooler, lighter colours that maximise natural light and space. Much as we’d love bright yellows and oranges in our houses, they are best suited to warm countries with lots of sunshine.


If you aren’t confident about choosing colours, working with an interior designer will help you visualise the finished look and avoid expensive mistakes.

Don’t be afraid of wallpaper

Wallpaper adds instant style to your home. From traditional florals to contemporary geometrics and tropical botanicals or animal motifs, there is something for everyone. Floral wallpaper works with any decorative style – whether it’s vintage, retro or contemporary – although I like to be daring and use bold tropical prints featuring classic palms and exotic botanicals. Geometric prints give instant art deco glamour to bedrooms and bathrooms and nature-inspired papers, featuring bold leaves and ferns, will inject nature into your home all year round and instil a sense of serenity and calm.


Mixing wallpaper and paint is a great way to create contrast and interest in a room. I like to paper one wall in a really gorgeous expensive designer wallpaper and paint the rest of the room in its background colour, so it blends in perfectly. 

Mix patterns

Mixing patterns creates a considered designed look. When you mix patterns, you need the right combination of shape, colour, shade, and size to create a cohesive look. Mix sure all your patterns aren’t the same size - pick a large pattern as the main pattern and then add medium and smaller scale patterns as accents. Keep your colours similar in tone so all your patterns work together. Create some areas of solid colour to break up the lines and shapes of the designs you’ve chosen. 


Mix old and new to add character

Mix vintage or antique furniture with modern pieces. If you have a strong sense of personal style, you’ll probably find everything you like works together. Vintage furniture is a short-cut to a lived-in look, but don’t forget lots of rugs, books and accessories. 

Don’t be afraid to mix periods, so you have some old and some new things, and a few surprising things.  

Go mad for cushions

Cushions are a important part of an interior designer’s work – and life! If you’ve completed the decoration of a room and are looking for something to pull the look together, cushions are a perfect inexpensive way to bring your home to life. Cushions can add texture, creating a cosy feel - and are a great way of changing up the style and feel of your room in different seasons. Cushions are also an easy way to introduce new design trends into your home.


Don’t scrimp on window dressings

How you decide to dress your windows has a dramatic impact on the look of a room and can be a big investment. With so many different fabrics and a wide variety of different styles of window dressing, you have a huge amount of choice to find something that works best for your décor but don’t scrimp on cheap curtains or blinds. Quality workmanship will ensure that your window dressings will last. 


Use plants to add life

Give your home life by adding house plants. They’re perfect for adding texture to your room plus they make your home feel calmer. A big fiddle leaf or Monstera plant can be a real focal point and give a 1970s vibe in a sitting room while a collection of succulents can look great on a floating shelf. Your choice of plant pots is the key. Natural raffia and macrame plant hangings give a boho vibe, while crisp white ceramics in geometric shapes look fresh and contemporary.


Bring art into your home

As someone who studied art early in my career, I always encourage my clients to bring art into their spaces. A stunning piece of artwork can completely transform a room and stamp your personality on the space.


Art can tell a story, add life to a space and bring bold elements into a room. When my clients and I are selecting a colour palette for a room, I often ask them to find a piece of art they love and we use it as the inspiration for the colour scheme. Art can show your creative side and communicate who you are and your tastes.

Think of your ceiling as a 5th wall

A neat trick when designing a space, as well as paying attention to your walls, is to think of your ceiling as a fifth wall. Adding wallpaper or a dramatic accent paint color can make a ceiling come alive.


Mix and match textures

Make sure you combine different textures when decorating your home.  An easy way to do it is with accessories – think about the mix of woollen rugs, velvet cushions, silk lampshades and wooden furniture. 


Don’t worry about having everything matching 

A room decorated with pieces from one shop will look bland and boring.  Use an eclectic approach to decorating to create a home that is stylish and unique.


Add an unexpected accent

Add personality to your space by adding something surprising to give a pop of interest. A piece of designer furniture, an oversized light or a dramatic wallpaper can turn a room from bland to boring.


If you are looking to revamp your space, working with an interior designer will really help you use your budget wisely and create a look that feels cohesive, pulled together and will stand the test of time.

We are a friendly, boutique business based in Bath, providing a range of interior design services for residential and commercial projects. With over 15 years experience, we work with a trusted network of professionals and trades offering complete design and refurbishment. From city centre apartments and retail units to large Georgian houses, our portfolio includes projects of all sizes. Our ethos is to take a collaborative approach with our clients, working with them to create spaces that meet their needs, improve their lives, and exceed their expectations. 

You can see many of the projects I have worked on since 2006 on my website at or click the buttons below.

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