7a, Grand Parade, Green Lanes, London, N4 1JX Directions

Tel 07525 326737
   Open today 08:00 - 18:00

Business overview

Your highly recommended local timber window and door company.

Acorn Sash Windows is a FENSA-registered company based in north London. We repair, draught proof, double glaze and install timber sash windows, casement windows and doors. We provide free surveys and comprehensive guarantees.

We're a local company - personable, attentive and skilful, and competitive without offering disingenuous discounts. We're obsessed with quality and attention to detail. We run a tight ship, communicate clearly and price keenly.

We use FSC-certified timber, jump on new technology and offer comprehensive guarantees. We use green utilities and donate £1,000 per year from profits to rainforest conservation.

The idea is that we're a superb choice - the full package. We hope that you agree.

Dominic Grant, Director


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Products & Services

FENSA-registered company

Insurance-backed guarantees

Free surveys and fully itemised quotations

Sash window repairs

Sash cord replacement

Sash window renovation and draught proofing

Double glazed sliding sashes

Complete FENSA double glazed sash windows

Timber sash window installation

Casement window repairs

Casement window renovation and draught proofing

Double glazed casement sashes

Complete FENSA double glazed casement windows

Timber casement window installation

Door repairs

Door renovation and draught proofing

Double glazed doors

Complete FENSA double glazed doors

Timber door installation

Coloured, textured, toughened, acoustic glass

Leaded stained glass


Locks and security

Painting and decorating

Spray painting


My experience was exemplary and I am delighted with Acorn Sash Window company

I couldn't be happier with my newly installed Acorn Sash Windows. They are fantastic and I am completely delighted with the service I received. I would highly recommend using this company. Dominic, the managing director was amazing in his thorough and clear communication and was wonderful in his follow through. Both of the workers were polite, friendly, professional, tidy, punctual, efficient and produced excellent work. The windows are beautiful and we are so very happy with them!
From beginning to end, the communication, service and product provided by Acorn was exemplary and I plan on using them again. 5 stars!
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Great service and superb craftsmanship

We were very pleased with the work recently done by Acorn Sash Windows. One was a new mini French door to a terrace; another was a refurbished sash window. I was informed of times of arrival and departure each day. The craftsmen who worked on the windows did an exceptional job. They cleaned up at the end of each day. There were a few tiny details to iron out and they were sorted immediately. The painter also worked flat out and finished the job with beautiful results. Very good communication from Zac and the office about each step in the process. I would not hesitate to recommend Acorn to anyone needed sash windows refurbished or replaced.
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Replaced and renovated windows and doors.

Acorn worked with us to make sure we had exactly the replacement windows and doors that we needed. They were extremely detailed in the way they measured up and prepared for the job. They were also diligent about checking the quality and finish of all the work carried out and that we were happy with the end result. We are! Neighbours have commented on how good the work looks too.
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Truly outstanding

I would give more stars if I could! Professional from beginning to end and a delight to work with. I had 2 windows draught-proofed and restored, and 2 replaced. The product is beautiful and incredibly high quality. They listened to my concerns and developed a solution that was sensible and worked for me.
They even finished a day early, which was amazing.
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Beautiful French Windows

I am delighted with my new doubled glazed French Windows. The workmanship was excellent and I was amazed that they had my old set and the new in, in just a day. I also think they were really good value for money.
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