With a commitment to providing exceptional quality products at a high standard, Dolphin are one of the best home improvement companies in North London. We also supply A-rated products to ensure that your home improvement offers the best security, energy efficiency and performance possible.

Why choose Dolphin?

Friendly, no hassle approach to business
Family-run, family owned business
Extensive range of high quality windows, doors, conservatories
No pushy salesmen: instead all sales visits are conducted by either out Managing Director or General Manager
Network Veka approved installer, FENSA and Trustatrader accredited
A-rated products as standard, for exceptional performance and energy efficiency

Contact Details

  City Chingford
  Postcode E4 9LN
  Address 2 Winchester Road
  Phone Number 0208 1273937

Products & Services


Dolphin’s quality range of replacement windows are a cost-effective solution if you want to enhance the aesthetics of your home externally, whilst creating internal benefits too. Our windows boast a range of benefits for you and your home:

Style: our replacement windows can be matched seamlessly to the rest of your property and help to enhance its character. Or, if you want to create a focal point, opt for coloured windows or an elegant bay replacement.
Energy efficiency: all of our replacement windows are installed with thermally efficient double glazing as standard. This keeps your window looking clean and shiny, and will help to reduce your heating bills.
Security: any style of window can be fitted with high-performance locking systems. Windows are often the first point of entry for thieves, but choosing replacement windows from Dolphin can give you peace of mind that your home won’t be targeted.


Replacement doors are small change that can make a big difference. Increase security, improve insulation and add a touch of personality to your property. A quality door will look stylish and benefit your home – you don’t need to choose between style and function with Dolphin.


Conservatories have been a feature of the most elegant homes for hundreds of years. Nowadays, a conservatory is the perfect way to increase the amount of space and natural light in any size property.
Our top of the range uPVC conservatories offer high thermal. Developments in glazing technology mean that we now use solar reflective glass for conservatory windows and roofs, for a comfortable room all year round.

Bi-folding doors

A luxury, top-end home improvement product, bi-folding doors are one of the most sought-after doors currently available on the market. At Dolphin, we offer sleek bi-fold doors made using modern aluminium or uPVC and high performance glazing that can reach up to an A energy rating.

Customer Testimonials

Really professional install in my Victorian terrace, they were able to harmonise the design and detailed work with the original features of my house. Whole house fitted, including a new backdoor, in three days. Excellent work, thanks

While they weren't the very cheapest of the quotes we got, the whole process of getting our windows replaced from Dolphin stood out from the competition from our very first contact. Paul, Joel and the whole team did an outstanding job of working with us to get new windows and a new front door which we are really happy with. It was reassuring dealing with the very experienced general manager and owner of the company which itself is well established and has a deserved good reputation. We were really impressed with the quality of the product and none of the other companies who sent surveyors / salespeople bought a sample window to show us or left us with product literature or schematics of the proposed job. The turnaround time to install was really quick as we got the work done at a relatively quiet time of year, and the difference it has made to the appearance and energy efficiency of the house is fantastic. The installation team and everyone we dealt with was very knowledgeable, warm and friendly and we will happily recommend their services to our family and friends.

Social Activity

Once enjoying the many benefits #IntegratedBlinds from Dolphin have to offer you’ll wonder how you ever coped without them, especially if you’ve had previous bad experiences with window blinds in the past.
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Controlling natural light entry has never been so convenient with our range integrated blinds!
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Never neglect the power of #AluminiumWindows, they may hold the secret to improving your home! Here's how:
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Sometimes it's the simplest option that is often the best! #CasementWindows #DoubleGlazing
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Our #CompositeDoors always place security first, thanks to the beauty of the Ultion lock!
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The first 2 of 9 #CompositeDoors going into retirement flats. 5 more expected from impressed neighbours.
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Our gorgeous selection of high performance French doors will never fail to make your house guests exclaim: "Ooh La La!"
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What does it mean to be a member of the Guild of Master Craftsmen? Find out here:
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