Contemporary Rear Extension
Barnet, North London
- Project Size
- 120 m²
- Completion
- 16 Weeks
ARZ Construction Ltd · Croydon & South London
Loft Conversions & House Extensionsin Croydon & South London
We build loft conversions, house extensions, kitchen and bathroom renovations, and handle electrical work — all across Croydon and South London. One team, one point of contact, and a finish you'll actually be proud of.
✓Send us a message — we'll get back to you within 24 hours, guaranteed
- 10+ Years in South London
- 5★ Google Rated
- Free Quote in 24 Hours
- No Hidden Extras
Who We Are
Croydon's Local Construction Team — Not a Big Firm, Not a One-Man Band
ARZ Construction has been working with homeowners across Croydon and South London for over a decade. We're not a large national contractor passing your job to whoever's available — we're a tight team of experienced tradespeople who take on a limited number of projects so every one gets proper attention.
- We manage the whole build — no coordinating separate trades yourself
- Fixed-price quotes with no surprise extras at the end
- You'll have one project manager's direct number from day one
ARZ Construction in numbers
10+Years Experience
100+Projects Completed
5★Customer Satisfaction
100%Commitment to Quality
Featured Project
Contemporary Rear Extension
A beautifully designed rear extension created to provide additional living space while connecting the home with its garden.
- Project Size
- 120 m²
- Completion
- 16 Weeks
What We Do
Loft Conversions, Extensions & More in Croydon
10 services under one roof — from full house renovations and loft conversions to roofing, plastering and decorating. Based in South London, with 10+ years of completed projects.
Latest Project
Full House Renovation
Complete property transformation including structural improvements, new interiors, a modern kitchen, bathrooms, flooring, decorating and finishing.
- Complete renovation
- Modern interior finishes
- Professional project management
- High-quality materials
How We Build
We Plan It Properly Before We Touch a Wall
Rushed starts cause most build problems. We take time upfront to plan the programme, sort materials and coordinate trades — so the build itself runs smoothly and you're not constantly firefighting.
- 01An Experienced Team You Can TrustOur core trades have worked together for years. You get experienced hands on your job, not whoever was free this week.
- 02Materials Specified and Sourced ProperlyWe don't leave material choices to chance. Everything is specified correctly and ordered from suppliers we have long relationships with.
- 03One Manager Responsible for EverythingOne person runs your project from first visit to final walkthrough. They're accountable for the programme, the quality and the communication.
Our Standards
Good Enough Isn't Good Enough for Us
Most complaints about builders come down to the same things — they cut corners, they don't communicate, and they disappear when something goes wrong. We've built our business on doing the opposite.
Quality You Can See
We check our own work at every stage before moving on. You shouldn't have to point out problems — we find them first.
We Show Up When We Say We Will
Agreed start date, consistent hours, site kept clean and safe. Basics that too many builders get wrong.
Fully Insured and Certified
All work is carried out by insured trades and signed off properly. You get the paperwork at handover — no chasing for certificates.
Recent Work
View All Projects Projects We've Completed in South London
Every photo below is from a real ARZ Construction project. No stock images, no renders — just finished work in people's homes.
Full House Renovation
Ealing, West London
- Property
- 4 Bed
- Completion
- 22 Weeks
Luxury Kitchen Installation
Richmond, South West London
Bathroom Renovation
Croydon, South London
Dormer Loft Conversion
Walthamstow, East London
Modern Interior Refit
Islington, Central London
Before & After
This Is What a Proper Renovation Looks Like
Drag the slider to see the difference. Same room, same house — completely transformed. This is the kind of result we aim for on every project.
Why ARZ?
Why Croydon Homeowners Choose Us Over Other Builders
We're not going to tell you we're the best — our clients' reviews say that. Here's what they actually tell us made the difference.
Proper Tradespeople
Not subcontractors hired last minute — our core team has worked together for years and knows what a good finish looks like.
You'll Always Know What's Happening
One project manager, one phone number. Weekly updates as standard — no chasing, no silence.
We Stick to the Programme
We plan the build properly before we start, so the timeline we give you is one we can actually keep.
The Details Matter to Us
Level lines, neat junctions, tidy reveals. The things you notice up close are the things we care about most.
One Team, Everything Covered
Structure, plumbing, electrics, plastering, decorating — all under one contract. No coordinating separate trades yourself.
We're Not Done Until You're Happy
We walk every finished job with you. If something's not right, we fix it. That's not a policy — it's just how we work.
How It Works
From First Call to Finished Build — Here's What Happens
No mystery, no vague timelines. Here's exactly how a project with ARZ Construction runs from start to finish.
- 01.
Consultation
We listen to what you want to achieve and set out realistic options.
- 02.
Site Assessment
We survey the property and identify anything that affects cost or programme.
- 03.
Planning & Quotation
You receive an itemised written quotation with a clear build programme.
- 04.
Construction
One project manager coordinates every trade and keeps you updated weekly.
- 05.
Final Inspection
We walk the finished work with you and complete a full snagging list.
Google Reviews
5.0 ★ Google Rating · 47+ ReviewsDon't Take Our Word for It
These are real reviews from homeowners in Croydon and South London — verified on Google, unedited.
"ARZ Construction built our rear extension and the result is stunning. From the first visit right through to handover, the team were professional, tidy and kept us informed every step of the way. The finish is exactly what we asked for. Would not hesitate to recommend."
Rear House Extension
"We had a dormer loft conversion done and the whole process was smooth. Very competitive price and the quality of the work is excellent. Our project manager was on site regularly and always available on the phone. The new bedroom and en-suite look brilliant."
Loft Conversion
"Complete kitchen renovation including moving the layout, new plumbing and electrics, tiling and full installation. Fantastic attention to detail — the worktops are perfectly level and the tiling is immaculate. Finished on time and within budget."
Full Kitchen Renovation
Where We Work
Based in Croydon, Building Across South London
We're a local team — not a national company dispatching crews from a depot. Most of our work is within 30 minutes of our base, which means we're on site when we say we will be.
North London
Barnet · Enfield · Haringey · Islington
West London
Ealing · Hounslow · Hammersmith · Brent
South London
Croydon · Bromley · Lambeth · Merton
East London
Hackney · Newham · Redbridge · Waltham Forest
Central London
Camden · Westminster · Southwark · Kensington
Surrounding Areas
Hertfordshire · Essex · Surrey · Kent
Ready To Transform Your Home?
Tell us about your project and receive a free quotation.
Get in Touch
Tell Us About Your Project — We'll Take It From There
Fill in the form and we'll come back to you within 24 hours. If you'd rather talk first, just call or WhatsApp — no scripts, no sales pressure, just a straight conversation about what you're looking to do.
- Phone
- +44 7860 135189
- Message us on WhatsApp
- Business Hours
- Mon – Fri: 8:00 – 18:00 · Sat: 9:00 – 14:00
- Areas Covered
- London & surrounding counties