A budget-friendly renovation isn’t about doing less — it’s about being deliberate with where the money goes. The projects that come in on budget share the same habits at the planning stage, long before a contractor sets foot on site.
Five things to get right early
- Set a clear brief before you start. Changing your mind once work is underway — moving a doorway, reconsidering a layout, adding a feature mid-build — is the single biggest driver of overspend. Time spent settling the brief properly at the drawing stage is cheaper than any change made once a contractor is on site.
- Spend on what’s hard to redo later. Structural work, drainage, insulation, and anything buried in the walls or floor deserve the budget, because correcting them after the fact is expensive and disruptive. Finishes — worktops, tiles, ironmongery — are where you can flex without compromising how the space actually works.
- Build in a real contingency. 10–15% of your build cost, set aside and genuinely untouched until it’s needed. Older properties in particular tend to turn up at least one surprise once walls are opened up, and a contingency that’s actually protected is the difference between a manageable hiccup and a stressful one.
- Sort permissions before you start, not during. Planning permission, building control sign-off, and party wall agreements all take time. Resolving any of these mid-build is one of the most expensive ways to lose momentum — and money — on a project.
- Consider going open plan. Removing a wall to open up a kitchen, dining, or living space is often far more cost-effective than building outward, while still transforming how a home feels — more light, more flow, and a layout that tends to add real value to the property.
Strip away what you don’t need
One of the most effective ways to keep a renovation affordable is to question whether a layer of finish is actually necessary. On a recent scheme for an industrial-style flat in Peckham, rather than boarding out the existing block walls and plastering over them, we kept them exposed and simply had them painted. It removed a whole stage of work and material cost, while giving the space more character than a standard plastered finish. Working with what’s already there, rather than covering it by default, is often where real savings live.
Spend where it changes how you live
The renovations that feel successful years later are the ones where the budget went toward daily life — light, function, flow — not features that looked good on a moodboard but don’t change how the house actually feels to live in. A clear brief, a protected contingency, and the right permissions secured early are what make that possible within a sensible budget.