Whether it’s a rear kitchen extension or a bathroom remodel, even the most common renovation projects have a habit of going over budget. The reasons vary – from weather delays and material shortages to unexpected structural issues – but in most cases, experts say the builder isn’t to blame.
Renovating is inherently complex. For most homeowners, a major project is a rare undertaking, yet the responsibility for managing costs ultimately sits with them. And as new research suggests, many are struggling to keep spending under control – so much so that a new term has emerged: renoflation.
According to the home improvement platform Checkatrade, a significant share of projects end up costing more than initially quoted. In a poll of homeowners who had undertaken work worth £500 or more in the past three years, 41 per cent said their final bill exceeded expectations.
On average, budgets overshot by 12 per cent. With the average project costing £11,039, that equates to an additional unplanned £1,325. More concerningly, over a third of respondents said they were forced to dip into emergency savings to cover the shortfall.
So why do so many projects spiral out of financial control? Checkatrade points to unrealistic expectations. '[Higher bills are] almost always a result of additional work identified once the job was underway,' says Emma Grant, the platform's head of trade engagement.
Her advice is pragmatic: seek multiple quotes, and for larger projects, commission a surveyor to uncover potential hidden issues before work begins. Crucially, she recommends building in a buffer of at least 10 per cent to cover unforeseen – or changing – costs. 'Those tiles or worktops you have your heart set on could have gone up by 15 per cent since your quote,' she says.
Emotional decision-making is arguably one of the biggest – and most avoidable – culprits when it comes to budgets unexpectedly inflating. DIY expert and Nailed It! author Laura Deller describes the phenomenon as 'reno dopamine' – the temptation to upgrade or add features mid-project. 'Spontaneous decisions to add a few extra flourishes which were not in the original plan mean the final bill can be higher than you expected,' she says.
Even the most detailed budget can unravel without discipline. The DIY expert stresses the importance of sticking to your plan, tracking spend – spreadsheets can be invaluable – and bringing in tradespeople who understand your vision and budget to keep the project on track.
'You cannot plan enough for a renovation,' Laura stresses. 'Open, honest communication helps keep projects aligned and can prevent unnecessary overspend,' she adds.
There are also practical savings to be found. Taking time to look for the best deals on fixtures and fittings can make a big difference, and where possible, doing some of the work yourself – like painting and decorating – can significantly reduce costs.
Ultimately, the most effective safeguard against overspending is preparation paired with restraint. Build in a buffer, expect the unexpected, and resist the urge to upgrade on impulse. Renovation will always carry a degree of financial uncertainty, but with clear planning and firm decision-making, it doesn't have to come at the expense of your financial stability.
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