A behind-the-scenes look at a high-end refurb with real lessons.
If you think half a million buys you a hassle-free build… think again.
This was one of our biggest residential projects to date at A2 Builders in London. A large Victorian home in a leafy part of South London. Great bones. Great location. And a long list of upgrades.
The owners wanted more space. Better flow. Cleaner finishes. A proper family home with the kind of layout that works when you’ve got kids, guests, and no time to trip over clutter.
We’re talking about:
– A full loft conversion
– Rear extension
– Kitchen overhaul
– Utility room
– Three bathrooms
– New electrics and plumbing
– New roof
– Garden landscaping
– And yes, re-plastering every single wall
Here’s the honest breakdown. What worked. What didn’t. And what we’d never, ever do again.
What worked
The loft conversion
No question—this was the biggest win of the whole project.
It turned a dusty storage space into a proper guest suite with a walk-in shower and amazing views over the city.
The best bit? We planned it early. That meant the steels went in before we touched the rear extension, avoiding rework or clashes.
Tip: If you’re doing both a loft and an extension—do the loft first. It makes everything else easier.
The open-plan kitchen
Not every house suits open-plan. But here, it made sense.
We knocked through the rear wall and added big sliding doors to the garden.
Natural light. Extra space. And a kitchen island big enough for six.
The clients spend most of their time here now. It’s the social heart of the house.
We used simple units, solid worktops, and clever storage—nothing flashy, but it looks sharp and works hard.
The decision to rent elsewhere
This one saved everyone’s sanity.
The clients moved into a short-term rental while we gutted the place. It cost them extra—but paid off ten times over.
No delays from working around them. No dust in the furniture. No stress from living on a building site.
If you’ve got the budget, do it.
What didn’t
Starting the landscaping too early
Here’s the mistake: we brought in the landscapers before the rear extension was 100% watertight.
A storm hit. The site flooded. And the new turf turned into a swamp.
We had to dig it all out and start again—costing time and money.
Lesson learned: finish the house before you tackle the garden. No exceptions.
The “trendy” lighting
The client fell in love with a designer lighting system.
Smart dimmers. Colour zones. Fancy fittings.
It looked good—until it didn’t work.
The app crashed. The wiring confused the electrician. And no one knew how to fix it.
In the end, we had to replace half of it with standard fittings.
Modern features are fine. But if no one on-site understands how to install or maintain them, they become a problem—not a perk.
Letting the client source their own bathroom fittings
Everyone thinks they’ll save money this way.
But what actually happened was delay after delay.
Wrong size basins. Taps with no fittings. Vanities with no brackets.
Meanwhile, the plumber sat around waiting.
Next time? We’ll insist on approving all client-supplied goods before anything gets ordered.
What we’d never do again
Skip a full-site survey at the start
We did the usual visual inspection. We poked at the walls. Took measurements. Everything looked fine.
But we missed a blocked drain under the rear extension.
We only found it when digging the foundations. By then, it was too late to shift the design.
Cue new plans. New schedule. New costs.
That one error pushed us back two weeks.
Never again. From now on, full CCTV drain survey before we break ground. No matter what.
FAQs
How long did this renovation take?
Just under 6 months, start to finish. But that included delays from supplier issues and the blocked drain.
Was £500K enough for all the work?
Yes—but only just. The clients were organised and had a small buffer. Without that, we’d have run into problems.
How much did the loft conversion cost?
Roughly £75K. It included insulation, staircase, en-suite, and two dormers. Money well spent.
Is it worth doing everything in one go?
If you can afford it, yes. It’s cheaper and faster than doing rooms one at a time. And you avoid living in a never-ending project.
What should people budget for unexpected costs?
10% minimum. 15% is safer. Things will go wrong. You want to be ready.
Pick The Right Team
Big budgets don’t make problems disappear. They just change the type of problems you’ll face.
What matters is planning. Picking the right team. Being realistic about time and money. And learning from people who’ve done it all before—mistakes and all.
If you’re thinking about a full refurb, or even just a loft conversion, talk to builders who tell you the truth, not just what you want to hear.
