Supply & fit
Aluminium bifold doors
Open up kitchens, extensions and garden rooms with properly surveyed aluminium bifold doors.
Explore options →Windows, doors and bifolds across London and the Three Counties
Windows, doors and bifolds — surveyed properly, supplied carefully, fitted cleanly.
Premium supply & fit and fit-only installation across Greater London, Hertfordshire, Bedfordshire and Buckinghamshire. Practical advice, careful measuring and clear compliance guidance before you order.
Survey-led installation with the compliance route explained before ordering.
Survey-led quotes
Supply & fit or fit-only
Compliance route explained
Real project photos
Workmanship terms explained
What we install
Better products. Better planned. Better fitted.
Choose the product around the opening, the property and the route to compliant paperwork — not just a frame colour from a brochure.
uPVC & aluminium
Replacement windows
uPVC and aluminium replacement windows fitted with clear guidance on ventilation, energy performance and certification.
Explore options →
Entrance upgrades
Composite front doors
Composite front doors, French doors, back doors and entrance upgrades fitted cleanly and carefully.
Explore options →
Trade-friendly
Fit-only installation
Professional fitting for suitable customer-supplied products, subject to checks before booking.
Explore options →Why choose Green Property?
Not a sales showroom. A proper installation team.
The quality of a window or door installation starts before anything is ordered. We check measurements, access, thresholds, ventilation, glazing requirements and the likely certification route so there are fewer surprises on installation day.
Start with a quoteMeasured before ordering
We check openings, access, thresholds and product suitability before committing to the job.
Compliance-aware
We explain the route for Building Regulations, Part L, Part F and safety glazing where relevant.
Fitted cleanly
Careful removal, alignment, sealing, trimming and handover.
Decision guide
Choose the right product for the opening
Bifolds, sliding doors, composite doors and replacement windows all solve different problems. Send photos if you are not sure what route suits the property.
Not sure? Send us photosMaximum garden openingBifold doors
Larger glass panelsSliding patio doors
Secure front entranceComposite front door
Practical replacementuPVC windows
Slim modern framesAluminium windows
Product already suppliedFit-only installation
Process
A clear process from first photos to final handover
1
Send photos or plans
We check the basic opening, product type and area.
2
Initial guidance
You get practical advice on likely options.
3
Measured survey
We check sizes, thresholds, ventilation and details.
4
Supply and install plan
Products, colours, hardware and lead times are confirmed.
5
Installation and handover
We fit, align, seal, test and leave tidy.
Compliance
Compliance explained before you order
We explain the compliance route before you order, not after the job is finished. Replacement windows and doors may need the correct Building Regulations route, including a Competent Person Scheme or Building Control where required.
Read our certification guidePart L energy performance
Explained in plain English before products are ordered or installation is booked.
Part F ventilation
Explained in plain English before products are ordered or installation is booked.
Safety glazing
Explained in plain English before products are ordered or installation is booked.
Certification route
Explained in plain English before products are ordered or installation is booked.
Proof plan
Project cards stay as proof slots until real evidence is verified.
These are not presented as completed case studies. They show the type of evidence the section needs before final public launch: real photos, product details, location permission and customer wording.
Hertfordshire
Bifold proof slot for a Hertfordshire extension
Use this slot for a verified rear-opening project once real photos, specification, location permission and customer wording are available.
Open proof checklist →Greater London
Replacement window proof slot for a brick home
Reserved for a verified window replacement showing ventilation decisions, finish details and the agreed certification route.
Open proof checklist →London and the Three Counties
Composite front door proof slot
Reserved for a verified entrance upgrade with frame size, threshold, glazing safety and hardware choices documented.
Open proof checklist →Areas covered
Windows, doors and bifolds across London and the Three Counties
Greater London
North London, North West London, West London, South West London, Harrow and Barnet
View area hub →Hertfordshire
Borehamwood, Watford, St Albans, Hemel Hempstead, Harpenden and Hitchin
View area hub →Bedfordshire
Luton, Dunstable, Bedford, Leighton Buzzard, Ampthill and Flitwick
View area hub →Buckinghamshire
High Wycombe, Aylesbury, Amersham, Chesham, Beaconsfield and Marlow
View area hub →Helpful guides
Answer the quote and compliance questions before the customer asks.
Guide links give the windows and doors section a clearer education journey from product choice to survey-ready enquiry.
What to send for an accurate quote
Photos, measurements and project details that help us give useful first guidance.
Read guide →Bifold vs sliding doors
A practical comparison for rear extensions, patios and garden openings.
Read guide →Do you need a FENSA certificate?
A cautious guide to certification routes before replacing windows or doors.
Read guide →Low threshold vs standard threshold
How threshold choice affects access, weathering, drainage and compliance.
Read guide →Start here
Ready to price your windows, doors or bifolds?
Send your postcode, a few photos and any rough measurements or drawings. We’ll tell you what we need to check and explain the likely route before you order.