What is the cost of a Croydon rear extension in 2026?

A high-specification single-storey rear extension of 25–35m² on a Croydon family home typically runs £95,000–£175,000 including bespoke kitchen. Combined loft + rear extension programmes typically run £220,000–£380,000. We publish a fixed-price contract before commit.

Do you handle planning permission for Croydon Council?

Yes. We handle Householder Planning Applications and Lawful Development Certificates in-house, including drawings, design and access statements, and the coordination with the council through determination.

Can you deliver a bespoke new build in Croydon?

Yes. We've delivered new builds on infill plots in CR0 and CR2. Contact us with your site details for a scoping conversation and a scheme design.

Will your Croydon finish match your central London projects?

Yes. The same in-house joinery, the same MEP standard, the same interior finish tier. Our Croydon pricing reflects efficient logistics on larger plots — not a compromised specification.

Croydon residential street — Prime Build Design

Large-Scale Renovations & Value-Driven Construction · CR0 / CR2

Builders in
Croydon.

Croydon is one of South London's most under-appreciated postcodes for family construction. The larger plots of Addiscombe, Selsdon, Sanderstead and Purley — many with generous side and rear gardens — offer scope that central London simply can't. That's exactly why our Croydon practice specialises in the bigger project: double extensions, combined loft and rear-extension programmes, whole-home renovations and new builds, all delivered under a single fixed-price contract with the same considered craftsmanship our clients receive across the rest of London.

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Section · 01

CR0 and CR2: bigger plots, bigger projects

Croydon's family homes typically have 20–30% more usable footprint than an equivalent house in Zone 2 or 3 West London. That means the projects our clients commission here tend to be more ambitious: not a modest side-return, but a double-storey rear extension; not a single loft dormer, but a combined loft conversion and full rear extension delivered in one programme; not a piecemeal upgrade, but a whole-home renovation that brings insulation, wiring, heating and interior finish up to modern standards while adding significant floor area. Croydon Council's planning approach is generally more permissive than central boroughs, but Article 4 directions apply in some conservation areas — particularly around Croham Hurst, Waddon and parts of South Croydon — and we handle those planning submissions in-house.

Section · 02

Croydon landmarks and neighbourhoods we serve

We're regularly on-site around Addiscombe, Selsdon, Sanderstead, Purley, South Croydon, Coulsdon and Shirley, and we take projects across CR0, CR2 and into the adjoining CR3, CR4 and CR5 postcodes. Homeowners in these neighbourhoods often come to us because they've seen the price-per-metre value that Croydon plots deliver — the same £250,000 that funds a modest kitchen extension in Chiswick will fund a full loft-and-rear extension programme in Sanderstead. Local landmarks that shape our schedules include the good schools around Addiscombe and Selsdon, the ridge of Croham Hurst, and the family-focused character of the South Croydon end of the borough.

Section · 03

Services we deliver in Croydon

Our most frequent Croydon briefs are combined loft and rear extension programmes — often adding 60–90m² in a single 20–28 week project; double-storey side or rear extensions delivering a family-scale kitchen-diner below and additional bedrooms above; whole-home renovations that reconfigure floor plans, replace MEP end-to-end, and re-specify interior finish; and bespoke new builds on infill plots. Every project is delivered under a fixed-price contract with staged payments tied to milestones, coordinated by a single project lead, and covered by our 10-year structural guarantee. Where planning permission is required, we handle Croydon Council submissions in-house.

Section · 04

Why Prime Build for your Croydon home

Croydon clients typically come to us for the combination of premium craftsmanship and honest, cost-engineered pricing. They want the finish level of our central London work — bespoke kitchens, high-specification bathrooms, thoughtful joinery and detailed decoration — at a competitive Croydon rate. We do this by running larger programmes efficiently: one contract covers a loft conversion, a rear extension and a whole-home refurbishment; one project lead coordinates every trade; and in-house joinery lets us deliver bespoke kitchens and fitted furniture at a fraction of what a specialist supplier alone would cost. The result is a Croydon home that competes with anything you'd see across the river — for real value.

Popular services in Croydon

What we typically build in CR0 / CR2.

Service

Loft Conversions

Turn unused roof space into a master suite, home office or family room. We design and build dormer, mansard, hip-to-gable and L-shape loft conversions across London — from structural opening to finished ensuite.

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Service

House Extensions

From single-storey kitchen extensions to full double-storey side-returns, we design and build extensions that add space, value and light to your London home — completed on time, on budget and to a 10-year structural guarantee.

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Service

Full House Renovations

A whole-home renovation is the deepest, most transformative project we deliver — and the one we love most. From strip-out and structural openings through MEP, joinery, kitchens, bathrooms and finishing, you get one accountable team and one contract.

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Service

New Build Contractors

Ground-up domestic new builds, from the first site survey and foundations through to handover. We work with your architect and design team or our own design partners — delivered with the same rigour, transparency and craftsmanship as every Prime Build project.

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FAQs · Builders in Croydon

Answers for Croydon homeowners.

Yes — this is one of our most common Croydon programmes. We deliver both extensions under a single fixed-price contract, sequenced so scaffolding, roofing and structural steel work are efficiently phased. Typical programme is 20–28 weeks for a combined project.

Serving Croydon