There’s a moment in every renovation where it suddenly feels very real. The drawings are done, you’ve imagined the finished space, and then the builders’ quotes arrive. Often they’re higher than you expected, or wildly different from each other. If you’re staring at three numbers wondering what on earth is going on, take a breath. This stage is emotional, but it can be approached logically.
Variation Is Normal
It’s completely normal for quotes to vary. Even significantly. That doesn’t mean one builder is greedy and another is a bargain.
Differences usually come down to:
• Assumptions about finishes and specification
• Different levels of experience
• Different overheads
• Different ways of structuring the price
One builder might assume a bespoke staircase. Another assumes a standard one. Same project. Different allowance. It’s usually about scope, not hourly rate.
Budget, Estimate, Quote
These are not the same thing.
A budget is an early guide.
An estimate is still approximate.
A quote should be detailed and specific.
If you receive one lump sum for a substantial renovation, pause. Without a breakdown, you can’t compare properly or adjust costs clearly later. A proper breakdown protects both sides.
Where Homeowners Often Get Caught Out
Provisional sums
These are allowances, not fixed prices. The more you have, the more uncertainty you carry.
Supply versus install
Some contractors supply and fit kitchens, doors and flooring. Others only install. That alone can make quotes look very different.
VAT
Never assume it’s included.
Scaffolding and preliminaries
Skips, parking permits, site setup, site management. These are real costs and they vary.
Foundations
This is a big one. Many builders assume standard foundations at around 900mm deep. If there are trees nearby or tricky ground conditions, you may need deeper foundations or even piling.
If you want clarity before committing, you can arrange for a trial hole. That reduces the risk of a surprise variation once work has started.
How to Compare Properly
Tender review is not about choosing the cheapest number. It’s about comparing like for like.
Line the quotes up side by side. Structure. Roofing. Plumbing. Electrics. Finishes. Once you account for missing items and remove extras you didn’t ask for, prices are often closer than they first appear.
The biggest mistake is assuming the lowest number is the best value without interrogating what’s included.
The One Question to Ask
Ask: What is not included in this price? It’s simple, but it surfaces assumptions quickly.
When It Still Doesn’t Make Sense
If the figures are still completely unfathomable, particularly on a larger project, you might consider speaking to a quantity surveyor. They can prepare a cost plan or bill of quantities so contractors are pricing exactly the same scope. It brings structure and clarity.
It’s worth knowing that some builders are less keen to respond to formal tender documents, and it can sometimes add a small premium. But on significant projects, it can be very helpful.
Receiving quotes is the moment your renovation turns into a financial commitment. It’s normal to question everything at this stage. The way through it is not reacting to the headline number. It’s calmly working through the detail. Clarity now saves stress later.
