Ask most people how to make a home smell good and they'll reach for a candle or a reed diffuser. It's a reasonable instinct, but it treats smell as decoration rather than what it actually is: information about how well a house is working.
A home that consistently smells fresh and clean has usually got there by design. That may be as simple as the paint on your walls or as intentional as how air moves from room to room. It's not very glamorous, but it's arguably doing more for your wellbeing than anything you can buy in the home fragrance aisle.
So how far can you design a home to smell good, rather than manage it after the fact? I put the question to architects and designers.
What causes bad smells in a home?
Most bad smells in a home come down to the same handful of causes. There are cooking odours that haven't been extracted before they settle into soft furnishings, there's damp or moisture sitting in a room with nowhere to go, and then there's stale air that simply isn't being replaced often enough. But it's important to note that none of these are solved by masking them with fragrance. They'll only be solved by fixing what's causing them.
That distinction – between masking a smell and actually purifying the air – is one Zaeem Chaudhary, MCIAT and director of AC Design Solution, is blunt about. "Scent should not be used to disguise poor ventilation, damp or high-emission materials," he says. "A genuinely pleasant-smelling home is normally the result of good airflow and materials that age well, rather than added fragrance."
In other words, a scented candle can make a room smell nice for an hour but it won't fix poor kitchen ventilation, a floor void that carries those cooking smells up into a bedroom, or a bathroom that never fully dries out. Those are design problems, and they have design solutions, from the materials you choose to how a home is ventilated and laid out.
Zaeem Chaudhary, MCIAT, is director of AC Design Solution, a multidisciplinary practice delivering architecture, structural engineering, and party wall services across London and the UK
Select materials that breathe, not just look good
The way a home ends up smelling is decided long before anyone's living in it, right down to what goes into the walls, floors and finishes during construction. Get that stage right and ventilation and layout have far less work to do later.
Synthetic materials and off-gassing
Most of us have lived through the smell of a new material without knowing what it was. Paints, adhesives, flooring and insulation are typically manufactured with volatile organic compounds locked into them, and those compounds leach out slowly, sometimes for years, which is the actual chemistry behind that "just renovated" smell that lingers however many windows you open.
What's more, high humidity speeds up how fast those chemicals are released, so a freshly plastered bathroom or a newly floored kitchen can smell faintly synthetic for longer than a drier room would.
If you're mid-renovation and thinking about how to reduce toxins during the build, material choice at that stage does more long-term work than any amount of airing out afterwards, says Zaeem Chaudhary. The materials that do the most for how a room smells, he adds, are the ones that manage moisture rather than trap it.
Natural materials and finishes that regulate scent
Lime plaster is a good example of what Zaeem Chaudhary means. It doesn't just tolerate moisture, it actively pulls it in when the air is damp and lets it back out again once things dry, working almost like a sponge rather than a barrier. That's a large part of why older, lime-rendered houses rarely develop the trapped, stale smell that newer builds sometimes do.
Paint a wall like that in something non-breathable (vinyl-based finishes are the usual offenders) and you cut that process off entirely, sealing moisture inside the wall instead of letting it pass through, which tends to be where musty smells and damp patches start, and often where that lingering paint smell comes from too.
Eloise Pfeiffer, interior designer at Pfeiffer Design, sees the same principle at play across a wider range of materials. "Incorporating natural materials such as wood, stone and linen not only adds warmth, texture and authenticity to interiors but they tend to breathe better than synthetic or man-made materials, helping to regulate scents in your home," she says. "They also don't release any potential chemical odours either, so your home feels healthier from the outset."
Based in Sussex, Pfeiffer Design was founded by Susie Pfeiffer and has over 30 years of experience in the high-end residential and boutique commercial sectors. The close-knit, multi-disciplinary team of designers, project coordinators and technical specialists work together to create inspirational spaces in the home counties, London and even abroad
Use ventilation to stop a house smelling bad
Newer, well-insulated homes tend to trap more smells precisely because they're built to retain heat. Older houses lost heat and smell alike through gaps around windows, doors and floorboards, letting air trade places without anyone designing for it.
A modern, airtight home doesn't have that accident to rely on, so ventilation has to be built in deliberately or smells simply have nowhere to go.
Natural ventilation
The simplest fix is still opening a window. Natural ventilation costs nothing and works well for everyday household smells, letting stale air out and pulling fresh air in without any mechanical help at all. But it's only as good as the air coming in. A window facing a busy road can let in as much smell as it lets out, so if that's your situation, natural ventilation alone won't solve it.
Mechanical ventilation
According to UK Building Regulations Part F, extract ventilation is required from rooms where water vapour or pollutants are likely to be released (kitchens and bathrooms specifically) before they can spread through the rest of the home.
In practice that means a kitchen extractor fan fitted directly above the hob and vented outside needs to shift at least 30 litres of air a second, rising to 60 litres a second if it's mounted elsewhere in the room. Bathrooms need 15 litres a second on an intermittent fan, or a lower continuous rate if the fan runs constantly rather than switching on and off.
MVHR applies this principle to the whole house. Rather than individual fans working room by room, a single system continuously draws stale, moist air out of kitchens and bathrooms and replaces it with fresh, filtered air, recovering most of the heat in the process. It's increasingly standard in new, airtight homes for exactly this reason, and MVHR can often be retrofitted into an older property too, usually as part of a wider renovation.
Trickle vents – the small adjustable openings built into window frames – do a version of the same job on an ongoing basis, and are required under the same regulations for exactly that reason.
Voted the best bathroom extractor fan by our editors, this model can remove 26 litres per second and has been awarded Quiet Mark accreditation.
Understand how layout can impact smell
Your home layout decides whether a smell stays put or spreads through the whole house. For example, knock through between a kitchen and living room and you lose the barrier that used to stop last night's dinner following you onto the sofa – a real trade-off with open-plan kitchens.
Older houses avoided this by keeping the kitchen behind its own door, a solution some newer builds are bringing back without giving up the open feel. Internal glazing and glazed partitions keep daylight moving through the house while giving the kitchen a door to actually close when something's on the hob. Crittall-style doors do the same job with a bit more presence, and pocket doors that slide fully into the wall offer the closed-off option without ever looking like a divider when they're open.
Layout works vertically too. A floor void or an old chimney breast can carry smell upward more efficiently than any open door downstairs, so a kitchen sitting beneath a bedroom can end up sharing more than anyone intended, and it's rarely obvious until you're living with it.
The fix depends on the cause. If the void is just a route, sealing gaps around skirting boards, pipes and joists usually solves it. If the void itself is damp or stagnant, sealing it first only traps the problem, it needs proper ventilation, working air bricks that aren't blocked or painted over, before anything gets sealed. Either way, raise it with an architect at the layout stage.
Create a strong connection to the garden
Design doesn't stop at the back door, says interior designer, Eloise Pfeiffer. "Framing nature, such as your garden design or the surrounding area, paired with carefully positioning your windows, will help with better airflow and a feeling of freshness in your home," she says. She recommends positioning dining tables, sofas and armchairs near open windows, so they get "more direct access to fresh air and natural scents from the gardens."
David Denyer, florist and gardening expert at Eflorist, takes this further: "A simple way to make your home smell naturally beautiful is to stop thinking of your garden and your house as two separate spaces, and instead design your planting areas around the parts of your home that open onto the garden and outdoor areas," he says. "This will help to create natural flows of floral fragrances that drift indoors with open windows and doors."
Scented plants positioned just outside kitchens, living rooms and bedrooms let warm summer breezes carry fragrance in, Denyer adds, an effect French doors and bifolds only amplify. He favours jasmine and roses for a layered floral note, tuberose for something richer, and sweet peas for lighter, nostalgic scent that's good for cutting. Herbs earn a place too. "Herbs like thyme, rosemary, mint and lemon balm release scent whenever they're touched or warmed by the sun, so are ideal to place around doorways, garden paths and outdoor seating," he says.
Cut flowers can stand in where outdoor space is limited. Denyer recommends scented bouquets in entrance halls, dining spaces or living rooms, cut early in the morning when fragrance is strongest. "It's an effortless way to make a home feel welcoming without relying on artificial air fresheners."
With over 35 years of floristry experience, David Denyer is a renowned master in his field. His talent has earned him numerous accolades and awards, establishing him as one of the florist industry's leading figures.
Focus on improving indoor air quality
Everything above assumes you're building or renovating a home, but most people aren't. If you're already living with a smell rather than designing it out, the fastest route to fixing it is improving your indoor air quality directly.
Treat underlying causes of damp or musty smells
Air purifiers and diffusers can clear and mask musty smells circulating in a room right now, but they can't stop mould or mildew producing more of it. Treating the smell without treating the source just means running a purifier indefinitely rather than fixing the problem once. So, make sure you tackle the root cause of mould and stay on top of ventilation and moisture control rather than relying on scent to paper over it.
In practice, this might look like running extractor fans in the kitchen and bathroom for longer than feels necessary, wiping down condensation on windows each morning, and keeping an eye on any recurring damp patches.
Purchase an odour-neutralising air purifier
The right air purifier can help improve indoor air quality, but not every model is built for smell. A true HEPA filter captures fine particles such as pollen, dust and mould spores. That's useful for allergens, but most household smells are a gas, not a particle, so HEPA alone won't touch them. Activated carbon does the job instead, absorbing smell-causing molecules rather than trapping dust.
When choosing the best air purifier for the job, carbon quantity matters more than the label. A thin carbon layer will saturate within weeks, whereas a deep carbon bed keeps working for months. Check the actual volume of carbon rather than assuming any "carbon filter" does the same job.
To get the most out of your unit, keep it running continuously, even on low, to prevent odours building up rather than just clearing them after the fact. Placing the unit near the source, by the kitchen rather than in a hallway, also tackles the smell at its strongest point.
The 360-degree air intake ensures efficient purification from all angles, providing clean air throughout the space, making it a great solution for pet owners and neutralising odours.
With its built-in anti-odour technology, this compact air purifier neutralises bad smells caused by cooking, while releasing a fresh scent as it cleans the air.
If your home is on a busy road, closing the windows during rush hour will do more for your home's air quality than leaving them open. Our guide to improving indoor air quality covers the wider habits that are worth building into your routine if bad smells keep returning.
