Cost guide
Extension costs in Kent — realistic budgets for Medway homes
Online averages rarely match your house. Here is how we think about extension costs in Kent, what quietly pushes budgets up, and how to get a quotation you can actually plan around.
What drives the price
Size is only the start. Ground conditions, drainage diversion, steel spans, roof type, glazing, kitchen supply and how much of the existing house needs making good often decide the real number.
A compact side-return can look cheap per square metre until you add a structural opening and a premium kitchen. A larger rear extension with sensible finishes can work out better value once you are living in it every day.
- Foundations and ground conditions
- Structural steelwork
- Glazing and roofing systems
- Kitchen and utility fit-out
- Electrics, heating and flooring
Indicative ranges
As broad guidance only, quality single-storey extensions around Medway commonly start in the mid-tens of thousands and climb with glazing, kitchens and complexity. Two-storey schemes and heavily glazed kitchen-diners sit higher still. VAT, design fees and kitchens may sit outside a build-only figure.
We would rather survey and quote properly than publish a fixed price that falls apart after the first site visit. If a quote looks dramatically cheaper than everyone else, ask what has been left out.
How to control cost without looking cheap
Spend on structure, weatherproofing and the rooms you use daily. Keep one-off details intentional rather than accidental. We help you decide where quality shows — and where a simpler detail still lasts.
Staging works can help cashflow, but breaking a project into too many phases often costs more overall because scaffolding, trades and making good get repeated.
Getting a useful quotation
Bring sketches, photos and a clear idea of how you want the space to work. We will walk the property, talk through options, and follow up with a staged quotation so you can see where the money goes.
Call 07591 484 863 or 07828 333 390 if you want an honest first conversation before drawings are locked.
FAQs
Frequently asked questions
Do your quotes include VAT?
We spell out VAT on every quotation so you can compare like with like. Build-only figures and kitchen packages are itemised clearly.
Are planning and structural engineer fees included?
Professional fees are usually separate. We flag likely third-party costs early so they do not appear as a surprise mid-project.
Can I stage payment?
Yes. Payments typically follow agreed milestones linked to progress on site — not a huge upfront lump with nothing to show for it.
Why do quotes vary so much between builders?
Specification, contingency, insurance, waste, making good and how optimistic the programme is all change the number. Always compare the same scope, not just the bottom line.
Ready to discuss your project? Call us or request a free estimate today.
Contact Napwood