Lean-to greenhouse options

I'm looking to get a lean-to greenhouse installed against the rear wall of my house. Due to lack of space I think I will need to go for a bespoke, designed to fit. My issue is finding a supplier who a)-can supply something to the dimensions I require and
b)-is based in Scotland or Northern England to reduce the delivery costs.

The rough size of the finished item I'm looking for is: 1800mm high, 1800mm in length and 1400mm depth from the wall of the house. Panes to be polycarbonate, guttering to tie in to drain which is just a few cm from site of greenhouse. Usual louvre pane and vented roof (auto temp controlled if possible). Due to the lack of available space for the height of the greenhouse (bottom of windowsill plinth), I'm keen to keep as shallow an angle as possible for the roof so that the height of the doorway isn't only fit for snow white's seven dwarves....

If anyone can recommend a supplier, or suggest who I can contact to get the wheels in motion for this, I'd be ever so grateful.

 

You may be better off asking a local handy man as this is a small structure. Timber frame with poly-carbonate cladding.

 

I dont think any of the big boys are likely to do custom made to those sizes and specification.
If they did it would cost the earth.

 

You can buy louvre units and bayliss automatic vent openers separately, and get your handyman to ensure the frames fit them.

 

Most greenhouse sizes are based around the 2ft x 2ft glazing sheets, so your 1400mm is not a standard size.

You can get 6x2 that would fit direct , just 1840mm high
2x6 Green Halls Wall Garden Lean to Greenhouse Toughened

Though think if you can dig down 300mm+ ( plus base ?) this would be the best fit.
Elite Windsor 4x6 Lean to Greenhouse Polycarbonate

We have an Elite lean to and its stood the test of time.

Other than those is a diy custom build , perhaps you could buy a second hand one, usually plenty on gumtree, and modify it to suit, if you can find someone handy at such metalwork.

A diy wooden one might be an easier way ?