The extension you'll never outgrow.
Firtree builds premium extensions, loft conversions and full renovations across North London, Enfield and Hertfordshire. One team from the first drawing to the moment you turn the key, so nothing gets lost between design and delivery.
We know letting a builder into your home feels like a risk
You have heard the stories. The job that ran months over. The budget that quietly doubled. The builder who stopped answering the phone. When it is your home and your money, choosing wrong is not a small mistake. It is a year of your life and thousands of pounds you do not get back.
A home that finally fits your life
With Firtree, your project is handled properly from the first conversation to the day you move back in.
Design shaped around how you live
Every plan starts with your family, your routines and the way you actually use the space. Not a template lifted from the last job.
Pricing you can plan around
An itemised quote at the start, and an honest conversation if anything shifts. No creeping extras, no vague line items.
A site you can live next to
Clean, considered and managed daily. Neighbours stay onside and your home stays liveable while the work happens.
Craft built for a lifetime
Materials, joinery and finishes chosen to hold their look and their value for decades. Built by tradespeople who take the detail seriously.
We know letting a builder into your home feels like a risk
It is your biggest investment and your family’s daily routine. We take that seriously, which is why we plan carefully, communicate constantly and treat your home the way we would treat our own.
Hi, I’m Matt Carter and i run Firtree Build, a family business in Enfield, specializing in home improvements including loft conversions, extensions, refurbishments, and new builds. I am personally involved in every project, ensuring high standards and client satisfaction.
The Firtree journey
Three simple steps to your new space
01
We come and listen
An unhurried visit to your home. We walk the space with you, understand what is missing and what matters, and leave you with a clear sense of what is possible.
02
A design and a real number
You receive an itemised quote alongside drawings that reflect the conversation we had. No template plans, no guessing, no pressure to sign on the spot.
03
We build. You watch it happen.
Weekly updates, a tidy site and one point of contact throughout. On handover day the house is finished properly, snags included.
Firtree Build is a North London building company delivering premium extensions, loft conversions, refurbishments and new builds for homeowners investing in the home they intend to stay in. We work across North London, Enfield, Hertfordshire and the parts of Essex inside the M25, handling projects from considered £100k renovations through to full homes worth up to £750k. As experienced North London builders, we manage every project end to end so you deal with one accountable team from first drawing to final handover.
What we build
Five services, one accountable team
LOFT CONVERSION
Dormer, Mansard & Hip to gable
Turning unused roof space into a proper room.
REFURBISHMENTS
Kitchens, bathrooms & full refurbishments
Bringing a dated property back to life, room by room.
RENOVATIONS
Whole Home Renovations
Managed end to end, first fix to final decoration.
New Builds
Ground Up Residential Builds
Delivered to a high standard, start to finish.
What we build
Work that speaks for itself
“Matt and his team built a rear ground floor extension for us in Islington. The price was competitive, Matt was quick to reply to any questions and helpful with suggestions and ideas. The quality of the work is excellent, Claud and Wojtek are highly skilled builders and we are very happy with the finish. Matt also coordinated well with other trades that were involved and the project progressed as expected. We had some minor delays as there were some complications with the piled foundations but Matt managed this well and minimised the impact on our project. I would highly recommend Firtree to anyone planning to build an extension.”
- BARNEY DINES
GOOGLE REVIEW
Cost calculator
What might your project cost?
Answer a few quick questions and get a guide price range for your extension, loft conversion or refurbishment. It takes about a minute.
Your project
Guide figures only, shown excluding VAT. Every home is different, so we give you a clear, itemised quote after a site visit.
FREQUENTLY ASKED QUESTIONS
Good to know before you get in touch
What areas do Firtree Build cover?
North London, Enfield, Hertfordshire and Essex inside the M25.
What size projects do you take on?
Home renovation and extension projects from around £100k up to full homes worth about £750k.
Do you handle planning permission?
Yes, where a project needs planning or a party wall agreement we manage it for you.
How do I get a quote?
Send your project details through the contact form and we will arrange a consultation.
Ready when you are
Ready to talk about
your project?
Tell us what you have in mind and we will come back with honest advice and a clear quote.