Extensions · Cambridge & the Fens
House Extensions in Cambridge:More Space.Built Properly.
Single and double storey extensions taken from footings to finished rooms by one firm, with fixed-price quotes, staged payments, and the carpentry at the heart of the build done by an NVQ Level 2 qualified carpenter.
Free site visits across Cambridgeshire · £5m public liability cover · 5.0 on Google
Free Site Visit & Quote Fixed price, no obligation
Staged Payments 25% deposit, milestones, balance at the end
£5m Public Liability Insured on every job
NVQ Level 2 Qualified Carpentry & joinery certified
Workmanship Guarantee On every job we complete
01The Service
What Our Extension Service Covers
A complete extension service: the groundworks and footings, the structural shell, roofing, the first and second fix carpentry, and the internal finishing that turns new square footage into a room that belongs to the house. Kitchen extensions, rear extensions, side returns, garden rooms and double-storey additions, planned, priced and built by one firm.
This service is for homeowners who need more space but don't want to move: a bigger kitchen, an extra bedroom, a proper family room. Around Cambridge, where moving house is expensive and period layouts are often tight, extending is frequently the smarter investment. We also take on extensions for landlords improving a property's layout and value.
You need a builder-carpenter rather than a general builder alone when the heart of the project is timber: roof structures, floor joists, studwork, staircases, and the second fix finishing that makes the new space feel like it was always there. That's precisely the work Charlie is NVQ Level 2 qualified in, and it's the work most extension problems trace back to.
Every extension starts the same way: a free site visit, an honest conversation about what's possible on your plot and your budget, and one fixed price quoted in stages so you always know where you stand.
02Why It Matters
What a Badly Built Extension Costs You
An extension is the biggest purchase most homeowners make after the house itself, and the least forgiving of poor workmanship. Footings skimped or ground not assessed properly lead to movement and cracking. Roof structures built carelessly leak for years. Timbers installed out of square leave a legacy of bouncing floors, sticking doors and cracking plasterboard that no amount of decoration will hide.
The financial exposure is why the payment structure matters as much as the building. Firms that want large sums up front, or vague 'supply and labour' estimates with no fixed figure, are asking you to carry all the risk. Our extensions are quoted at one fixed price, paid in stages, a 25% deposit, further payments at agreed milestones, and the balance on completion, so you only ever pay for work that has actually been done.
Then there's the disruption: months of a building site attached to your home. It will never be invisible, but a firm that is punctual, tidy and communicates honestly, the words our reviewers use, unprompted, makes the difference between a stressful ordeal and a manageable project.
Common Mistakes Homeowners Make
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01
Choosing a builder on a vague estimate rather than a fixed-price quote:'estimates' have a habit of growing.
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02
Paying large sums up front with no staged payment structure, your money should follow the work, never lead it.
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03
Assuming the cheapest quote covers the same scope, groundworks, roofing, first fix and finishing are all places where corners hide.
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04
Not asking who does the structural carpentry, the roof, joists and studwork decide how the extension behaves for decades.
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05
Starting without checking whether the project needs planning permission or building regs sign-off, we flag this at the site visit.
03How It Works
How Your Extension Runs
01
Free Site Visit
Charlie visits, looks at the plot, the existing structure and access, and talks honestly about what's possible for your budget: including planning and building regs considerations. It costs nothing and obliges you to nothing.
02
Fixed-Price, Staged Quote
You get one clear, fixed price for the project with a staged payment plan: 25% deposit, further payments at agreed milestones, and the balance on completion, so you always know what is due and when.
03
Groundworks & Shell
Footings, foundations and the structural shell go in, with the timber work, roof structures, joists and studwork, carried out by an NVQ Level 2 qualified carpenter.
04
First Fix to Finish
Roofing, first fix, plastering coordination and second fix carpentry, doors, skirting, flooring and the finishing that ties the new space into the old house.
05
Handover & Guarantee
The finished extension is walked through with you, the site is left clean, and the balance is only due on completion. The work is covered by our workmanship guarantee, terms vary by job type, so ask when we quote.
04Why CV Carpentry
What You Get With CV Carpentry
An extension is a serious commitment. Here's how we make sure it's a safe one.
One Fixed Price, Paid in Stages
25% deposit, milestone payments as work completes, balance at the end. Your money follows the work, and the price we quote is the price you pay.
Payment Spread Across the Build
Extensions are paid in stages: a 25% deposit, further payments at agreed milestones, and the balance on completion, so the cost is spread across the programme rather than falling in one lump.
Carpentry at the Core
Roof structures, joists, studwork and second fix done by an NVQ Level 2 qualified carpenter, the structural heart of your extension in qualified hands.
One Point of Contact
Charlie runs your project from first site visit to final walkthrough. You always know who's on site, what's next and what it costs.
Public Liability Insured
Public liability cover up to £5 million on every project, serious cover for serious work on your home.
Finished Like It Belongs
The second fix is where an extension becomes part of the house, matched skirting, true-hung doors and finishing that makes the new space feel original.
05In Detail
Extensions in Detail
The types of extension we build, what each involves, and how the work is structured across Cambridge and the Fens.
Single Storey Extensions
The most popular way to transform a ground floor: bigger kitchens, open-plan family rooms, utility space and garden rooms. Single storey extensions typically involve groundworks, a structural shell, a flat or pitched roof, and full internal finishing.
The carpentry core, roof timbers, joists, studwork and second fix, is done in-house by an NVQ Level 2 qualified carpenter, which is where the long-term quality of the build is decided.
Double Storey Extensions
Adding bedrooms and bathrooms above new living space is the most cost-effective square footage you can add to a house, the groundworks and roof are shared across two floors of new space.
Double storey work demands more of the structure and the planning. We'll tell you honestly at the site visit what's realistic on your plot, what the planning picture looks like, and what it will cost, one fixed price, quoted in stages.
Kitchen & Living Space Extensions
The most life-changing extensions are the ones that give a family room to breathe: a kitchen big enough to eat in, a living space that opens to the garden, a ground floor that finally works. These projects combine the full build, groundworks, shell and roof, with the internal finish that makes the space usable.
That interior finish is handled in-house through our carpentry and second fix work, doors hung true, skirting matched to the existing house, flooring laid properly, so the new room ties into the old one seamlessly.
Planning, Regs & Payment Structure
Many extensions fall within permitted development, but not all, we'll talk through the planning and building regulations picture at the site visit so you know where you stand before committing to anything.
Payment is always staged on extensions: a 25% deposit, further payments at agreed milestones, and the balance on completion. Bank transfer, cash and card accepted.
Questions
Extension Questions, Answered Straight
Get Started
Get the Space Your Home Is Missing
Free site visit, one fixed price with staged payments, and a workmanship guarantee on the finished build. Call Charlie directly, or send the details and we'll come to you.
Free site visit & fixed-price quote
£5m public liability cover
Workmanship guarantee