And Why a Detailed Quote After Planning & Building Regs Is So Important
When you’re planning a home extension, loft conversion, garage conversion, or any renovation, it’s natural to start by collecting quotes. But what many homeowners don’t realise is that the initial tender price is often just a ballpark figure — and not the final cost of the project.
Here’s why that matters — and how to make sure you get an accurate, transparent quote you can trust.
What is an Initial Tender?
An initial tender or estimate is usually based on limited information — often just a conversation, rough ideas, or early-stage drawings. It’s a useful starting point to understand ballpark costs and see whether the project is viable for your budget.
However, it’s not a fixed price, and it shouldn’t be treated as one.
Why the Price Can Change
Once detailed architectural plans and building regulations are in place, your builder will be working with a much clearer understanding of the project’s scope. These documents specify materials, structural work, insulation, drainage, steelwork, electrical plans, and more — all of which directly affect cost.
This is when a contractor can give you a realistic and accurate quote.
In fact, some companies give a low initial estimate to win your interest — only for the price to increase significantly later on when the actual detail is revealed. This can cause unexpected costs, project delays, and a lot of unnecessary stress.
Why You Should Always Ask for a Detailed Quote After Planning & Regs
At The Big Conversion Company, we take a different approach.
We know how frustrating price increases can be — which is why we try to give you a realistic and well-considered estimate from the very beginning. We factor in as much detail as possible, even in the early stages, to avoid surprises later.
By the time your final plans and building regs are in place, our official quote usually stays very close to the original estimate — and in many cases, ends up slightly lower.
Why? Because we’d rather be accurate than overly optimistic. It’s all part of our commitment to transparency, trust, and doing things properly.
🔎 Key Things to Check When Comparing Quotes:
- Is the quote based on approved drawings?
- Does it include building control, waste removal, finishes, and project management?
- Is it itemised or just a lump sum?
- Have they explained what might be excluded or listed as provisional?
Final Thoughts
An initial estimate can be a helpful guide, but it’s the detailed quote based on final plans that truly tells you what your renovation will cost. Choosing a builder who’s upfront about this process will save you time, money, and hassle in the long run.
At The Big Conversion Company, we aim to make that process easy and honest — with quotes that reflect the full picture, right from the start.
Need a quote you can trust?
We’d be happy to talk through your plans and provide a clear, honest estimate — and when you’re ready, a fully detailed quote with no surprises.
📞 01202 090 333
📧 hello@thebigconversioncompany
🌍 www.thebigconversioncompany.co.uk
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