Whether it's repainting the hallway or turning a spare bedroom into a bespoke office, there's nothing quite like the feeling of transforming a space you've fallen out of love with in your home. But while it's tempting to breathe new life into your property with a few minor - or major - adjustments, experts warn that not all renovations are worth the investment.Some can even reduce your home's value, make it harder to sell or put off potential buyers altogether - leaving you spending far more on a renovation than you will ever recoup.And with sleek, minimalist interiors and modern concepts like open kitchen shelving and paving over front gardens with concrete dominating trends, it's worth keeping in mind that what looks stylish now may not appeal to everyone.Jordana Ashkenazi, Founder and Design Director of Element One House, said: 'If this is genuinely your forever home, then absolutely do what you want. Wallpaper the ceiling, have a red kitchen, create the bathroom of your dreams...'But if there is even a chance you might sell in the short or medium term, you do have to think about the next person through the door. You want buyers imagining themselves living there, not mentally pricing up how much it’s going to cost to undo everything you have done.' If you think a sale could be on the cards, here are 21 renovation choices you may want to think twice about... Looking to sell your home one day? Here are 21 renovation choices you may want to think twice about, as expert Jordana Ashkenazi warns against busy, bold designs like Sir Rod Stewart's... Chopping up space with unnecessary walls According to Jordana, adding walls to create more rooms can make a home feel smaller, darker, more dated and less practical, particularly around kitchens and family spaces.Jordana said: 'Buyers still love open, light filled living spaces. Yes, acoustics and separation matter, but more rooms don't automatically equal more house.' Ripping out period featuresOriginal fireplaces, cornicing, doors and floorboards can actually be some of a period property's biggest selling points, so removing them can strip away much of its character. According to Jordana, the key is finding a balance between old and new.She said: 'If your Victorian cornicing has survived 150 years, perhaps don’t be the person who finally kills it. 'Obviously, if something is genuinely beyond repair, that's different. But otherwise, work with the history rather than removing it. Old meets new can be beautiful. Old meets skip outside the house, less so.'Replacing original windows with cheap uPVC Swapping original windows for cheap, poorly proportioned replacements can undermine the character of an entire property - even if the interiors have had an expensive makeover.The expert added: 'You can spend a fortune on your interiors and completely undermine the exterior with chunky, poorly proportioned replacement windows.'New windows don’t have to be traditional, but they do need to respect the architecture.'Expressive kitchens and bathrooms According to Jordana, bold kitchens, bathrooms and laundry spaces like Stacey Solomon's can be fun, but with these being some of the most expensive rooms to replace, very strong design choices could put off future buyersAccording to Jordana, bold kitchens, bathrooms and laundry spaces like Stacey Solomon's can be fun, but with these being some of the most expensive rooms to replace, very strong design choices could put off future buyers.But the expert isn't against colour entirely. Instead, she suggests ways says to embrace it without going overboard.She said: 'Your lime green kitchen may bring you enormous joy. The next buyer may see a very expensive problem.'Rather than screaming yellow, perhaps butter, ochre or mustard. Instead of fire engine red, perhaps terracotta or clay.'Colour is fabulous. Colour that enters the room five minutes before you do can be more challenging.'High gloss interiors High-gloss kitchens and ultra-trendy finishes can quickly look dated, making more timeless materials a safer choice for costly features designed to last. Jordana added: 'For expensive permanent elements, I tend to favour materials with more longevity and bring personality in through things that are easier to change.' Rooms with every shade of grey Grey may be a classic, but covering every room and surface in the same shade - as seen in Colleen Rooney's family mansion - can leave a property looking stuck in a particular era - echoing the haunting crushed velvet trend from nearly a decade agoGrey may be a classic, but covering every room and surface in the same shade - as seen in Colleen Rooney's family mansion - can leave a property looking stuck in a particular era - echoing the haunting crushed velvet trend from nearly a decade ago.Jordana said: 'Grey is not illegal. But the grey floor, grey sofa, grey kitchen, grey bathroom, grey walls and chrome everywhere look has definitely had its moment.'When every permanent finish follows one trend, the whole house can date at exactly the same time. Warm neutrals, stone, timber, texture and subtle colour tend to create much more depth.'Replacing a home's only bath with a shower A walk-in shower may be a dream for some, but getting rid of every bath could immediately make a family home less appealing to buyers with young children. Jordana recommends keeping at least one.She said: 'You can have all the beautiful showers you like elsewhere, but removing every bath can rule a property out for families before they have even reached the second viewing.'Sacrificing a bedroom for a permanent dressing room A glamorous dressing room might be tempting, but turning a whole bedroom into one can reduce the property's appeal when buyers are searching specifically by bedroom number.Jordana said: 'If you’re turning bedroom four into your Carrie Bradshaw moment, try to keep the design reversible.'Buyers search by bedroom count, and a four-bedroom house becoming a three-bedroom house can have a very real impact on who even comes to view it.'Bespoke joinery - everywhere Bespoke storage can add value and character, but overly elaborate or trend-led joinery may be difficult for buyers to look past - particularly if it takes up large amounts of usable space.According to the expert, expensive doesn’t always mean desirable to everyone.She warned: 'If you’re going to invest in bespoke pieces and there’s a chance you may sell, I would usually lean towards something more timeless and architectural.'And be careful with endless shelving and niches. There was a period where every wall seemed to have shelf after shelf after shelf, and eventually you start wondering how many books, vases and ornaments one person is expected to own just to make it all look finished.''If your buyer walks in and immediately thinks, good grief, how am I going to fill all of that, the joinery is probably doing too much.'Giant media walls and TVs A huge media wall - a focal point Amanda Holden's home - can quickly become the dominant feature of a room and may be difficult to remove or adapt when tastes changeA huge media wall - a focal point Amanda Holden's home - can quickly become the dominant feature of a room and may be difficult to remove or adapt when tastes change.Jordana said: 'Media walls can work beautifully when they are subtle and properly integrated, but huge fake chimney breasts, endless niches, strip lighting and a television the size of a cinema screen can completely dictate the room.'Design the room first. The television is allowed to be a supporting character.'Open kitchen shelving replacing actual cupboards Open shelving can look beautiful when carefully styled, but replacing too much traditional storage can make the space far less practical for everyday life.Jordana says there needs to be a balance between aesthetics and the realities of living in the space.She added: 'Open shelving looks fantastic when it has three artisanal bowls and a beautifully placed olive oil bottle.'Real families also own cereal, mugs, vitamins, children’s cups, a blender and approximately 400 mismatched Tupperware lids. Buyers do, eventually, need somewhere to hide the Weetabix.' Minimalist interiors While minimalist interiors may look great in photographs, as seen in Danielle Lloyd's property, homes still need plenty of practical storage for the clutter that comes with everyday life. Jordana said: 'Coats, suitcases, linen, toys, shoes and all the unphotogenic bits of real life have to live somewhere.'I either meet clients who want a cupboard on every available wall or people who apparently own nothing. The sweet spot is somewhere in between.'Cheap flooring in an expensive house Flooring covers a huge amount of visual space, so choosing a cheap-looking option can undermine even the most expensive kitchen or interiors. According to Jordana, it's about finding something that suits the property without necessarily spending a fortune. She said: You don’t have to spend an absurd amount, but it needs to suit the value and architecture of the property. And please think twice before ripping up beautiful original timber and replacing it with something pretending to be timber.' Badly designed extensions Adding extra square footage doesn’t automatically make a property more desirable. In fact, a poorly planned extension can affect natural light, flow and how the original house works. Jordana said: 'I've seen enormous extensions that leave the entire middle of the original house looking like dusk at 11am. A bigger house that feels worse is not an upgrade.'Removing walls for open-plan living Open-plan living can be appealing, but knocking down walls - as Kanye West once did in his Malibu mansion - without considering furniture placement can leave a space awkward and difficult to use. Jordana says homeowners should think about the practicalities before reaching for the sledgehammer. She cautioned: 'Before knocking down a wall, ask a revolutionary question. Where will the sofa go? Where will the television sit? Where does the artwork hang?'A fabulous architectural opening is less fabulous when every piece of furniture ends up floating awkwardly in the middle of the room.' Dramatically changing the front of the house Modernising a property's exterior can give it a fresh look, but dramatic changes that clash with its original architecture could put potential buyers off before they even step inside. Jordana said: 'The front elevation is your property’s first handshake. Modernise it, absolutely. Just don’t make your Georgian house look as though it's wearing a spaceship.'Busy wallpaper or wall design - and lots of it Wallpaper and bold colour - much of which can be seen in Amanda Holden's home - can transform a room, but using strong patterns and saturated shades throughout the house can make it harder for potential buyers to picture themselves living thereWallpaper and bold colour - much of which can be seen in Amanda Holden's home - can transform a room, but using strong patterns and saturated shades throughout the house can make it harder for potential buyers to picture themselves living there. Jordana says the impact goes beyond simply whether someone likes the colour, adding: 'You want a buyer thinking "I could live here", not feeling as though they’ve been attacked by a giant tropical leaf.' Concreting over the front garden Off-street parking is valuable, particularly in cities, but paving over an entire front garden - as done by many celebrities, including TOWIE star Billie Faiers - can leave a property feeling harsh and uninviting.Jordana said: 'You can park the Range Rover and still have a hydrangea. Even a little planting, hedging, a tree or some greenery can make an enormous difference.'Overcomplicated lighting A well-lit home needs layers, but an excessive number of fixtures and switches can make a room unnecessarily complicated and restrictive. According to the expert, there's a difference between considered lighting and simply adding more of it.She said: 'I’ve walked into homes with so many switches that you need an induction course before turning on the sitting room.'Wall sconces everywhere, strip lighting everywhere, fixed picture lights, floor lights, stir lights, ceiling lights. Eventually the buyer starts wondering which electrician they will need on speed dial.'Layered lighting is gorgeous. Over-engineered lighting can become restrictive.'Downlights all over the ceiling Rows of downlights can make a home feel clinical rather than cosy, particularly when they are used across every room without much thought. Jordana joked: 'Your sitting room is not Heathrow Terminal 5. Downlights are brilliant when they're positioned where they are actually needed.'Use pendants, lamps, wall lights and discreet architectural lighting to create atmosphere.'