Builders in Barnet | Extensions, Loft Conversions & Renovations North London
Design. Construct. Deliver.
Premium builders crafting extensions, renovations, loft conversions and new build homes across Barnet and North London. Fully managed, on time and on budget.
Building Services, Beautifully Delivered.
We deliver a comprehensive range of services for residential and commerical clients. Whether creating a premium home extension or an elite full-property renovation, our team provides a stress-free, end-to-end service delivered by a team with over 25 years of combined industry experience.
Home Renovations
Full-property and room-by-room renovations across Barnet and North London—from period restorations to contemporary refits.
Loft Conversions
Dormer, hip-to-gable, mansard, and L-shape loft conversions across Barnet and North London—adding luxury living space.
Home Extensions
Looking for experienced extension builders in Barnet? The Construction Collective designs and delivers fully managed home extensions across North London and Hertfordshire, including rear, side-return, wrap-around, kitchen, single-storey and double-storey extensions.
Kitchens & Bathrooms
Bespoke kitchen and bathroom design, supply, and installation—featuring premium finishes and trusted trades.
Refurbishments
Residential and commercial refurbishments—structural alterations, full strip-outs, replastering, and decoration.
Garden Rooms
Insulated, year-round garden rooms—premium home offices, studios, and gym spaces designed and built to last.
New Builds
End-to-end premium new-build homes—from groundworks and structural build through to luxury interior handover.
Healthcare & Specialised
Healthcare fit-outs and specialised construction—dental, GP, and clinic environments delivered to strict compliance.
How We Work
No surprises. No jargon. Just a clear process from day one.
- 1
Free Consultation
We come to you, understand the project, and give honest advice — no pressure, no sales pitch.
- 2
Detailed Quote
You receive a clear, itemised quote with no hidden costs. We walk you through every line.
- 3
Design & Planning
Our team handles plans, permissions and scheduling so you don't have to think about it.
- 4
The Build
Our in-house team gets to work. You get regular updates and one point of contact throughout.
- 5
Handover
We don't leave until the job is finished to your complete satisfaction — then we stay in touch.
- 1
Free Consultation
We come to you, understand the project, and give honest advice — no pressure, no sales pitch.
- 2
Detailed Quote
You receive a clear, itemised quote with no hidden costs. We walk you through every line.
- 3
Design & Planning
Our team handles plans, permissions and scheduling so you don't have to think about it.
- 4
The Build
Our in-house team gets to work. You get regular updates and one point of contact throughout.
- 5
Handover
We don't leave until the job is finished to your complete satisfaction — then we stay in touch.
Featured projects.
Single-Storey Rear Extension & Structural Renovation
Ground Floor Rear Extension & Residential Reconfiguration
Ground Floor Extension & Renovation
Category 3 Dormer Loft Conversion Above Commercial Premises
Single Storey Rear Extension
Full Property Renovation
How much will your project cost?
Get an instant cost estimate for your extension, loft conversion, renovation or new build — tailored to your project in under 60 seconds.
A Fully Accredited Building Company in Barnet Serving North London & Herts
We are a Barnet building company with a real High Street presence — our office is at 230 High Street, Barnet EN5, so you can visit us in person. Our team brings over 25 years of combined industry experience and manages every project end to end, from groundworks and structure through to turnkey finishes and final Building Control sign-off.
Builders you'll actually want in your home.
We work with homeowners who want the job done properly and want to enjoy the process. Here's what makes the difference.
25+ Years Experience
Delivering high-quality home renovations, extensions and new builds across Barnet and North London.
Fully Managed Service
From initial planning through to completion — one team, one point of contact, one seamless process.
Trusted Local Builders
Established builders in Barnet, known for reliability, quality workmanship and attention to detail.
On Time, On Budget
Fixed quotes and transparent scheduling. No vague timelines, no surprise invoices.
A New Chapter for The Construction Collective
The Construction Collective was built on a simple promise: deliver exceptional work, every time. Now, as our founding CEO steps back from day-to-day operations, Parsa Salimbayat is leading the business into its next era — bringing fresh energy, a client-first mindset, and the same uncompromising standards the company was founded on.
Book a Consultation with Parsa"Every client deserves to feel their project is in the best possible hands — from the first call to the final handover."
Frequently Asked Questions
Everything you need to know before you start your project.
Across North London & Hertfordshire.
Based in Barnet and proud to work across the surrounding areas. Not sure if we cover you? Give us a call.
See all locations- IslingtonN1
- Crouch EndN8
- TottenhamN17
- SouthgateN14
- Palmers GreenN13
- Winchmore HillN21
- EdmontonN9
- Friern BarnetN11
- Waltham CrossEN8
- BarnetEN4 / EN5
- FinchleyN3 / N12
- HampsteadNW3
Ready to build something exceptional?
Book a free, no-obligation consultation. We'll visit your home, listen to your brief and tell you honestly what's possible.
Or message us directly on WhatsApp — we typically respond within the hour.