Teesside's Expert Windows & Doors Specialists
With over 30 years of combined experience, Transform UK Developments Ltd supplies and fits premium composite doors, uPVC windows, bi-folds, French doors and sliding patio doors across Teesside and the North East — all backed by our full 10-year guarantee.
Transform UK Developments Ltd
Family-Run Business • Serving All of Teesside
"At Transform UK Developments, with over 30 years of combined experience, we supply and fit quality uPVC and aluminium windows and doors that enhance homes and spaces — backed by our full 10-year guarantee."
Everything Your Home Needs In One Place
From energy-efficient window replacements and bespoke composite doors to bi-folds, French doors and roof lanterns.
Windows & Glazing
Energy-efficient A+ rated uPVC and aluminium casement, tilt & turn and vertical sliders.
Composite & uPVC Doors
Bespoke composite doors available in any custom colour of your choice, plus French & bi-folding doors.
Bi-Fold, French & Patio
Open up your home to the garden with aluminium bi-folds, French doors and smooth sliding patio doors.
Project Gallery
Browse real Transform UK installations across Teesside — front doors, windows, bi-folds and patio doors we've fitted.
On The Road Across Teesside Every Day
Our fully liveried vans and experienced fitting teams supply and fit premium windows and doors to homes across Redcar, New Marske, Saltburn, Guisborough and the wider North East — backed by over 30 years of combined installation experience and our full 10-year guarantee.
30+ Years Combined
uPVC & Glazing Expertise
CERTASS Certified
Building Regs Approved
Selecta Systems
British A+ Rated uPVC
10-Year Guarantee
On Every Installation
Tell Us What You're Looking For
No pushy salespeople. Just a friendly chat about your project with a free, no-obligation home survey across Teesside and the North East.
1. What home improvement products do you need?
Select all that apply — you can pick more than one.
Serving Redcar, New Marske, Saltburn & All Teesside
Based in New Marske, Transform UK Developments Ltd supplies and fits premium uPVC and aluminium windows and doors with over 30 years of combined installation experience — backed by a full 10-year guarantee on every fitting.
Redcar
Local Redcar Window & Door Fitters
Our home turf. We supply and fit uPVC windows, composite front doors, French doors and bi-folds across Redcar and the surrounding coast.
Fast local response & free home surveys
New Marske
Our Home — New Marske HQ
Our main operational base. Fitting uPVC windows, composite front doors, French doors and bi-folds across New Marske and the surrounding area.
Our home turf — fastest response times
Saltburn-by-the-Sea
Coastal Glazing & Weatherproof Doors
High-grade uPVC windows, composite doors and aluminium bi-folds designed to withstand harsh coastal weather and sea salt air.
Marine-grade fittings & seals for the coast
Guisborough
Heritage & Modern Glazing Solutions
Period sash windows, flush sash timber-look frames and composite doors in any custom RAL colour for traditional and modern Guisborough homes.
Custom door colours & traditional finishes
Middlesbrough
Full Residential Window & Door Fitting
Complete double glazing installations, composite entrance doors, bi-folding doors and sliding patio doors for homes across Middlesbrough.
CERTASS certified window replacements
Stockton-on-Tees
Windows, Doors & Sliding Patio
Upgrading tired windows, installing sliding patio doors, French doors and energy-efficient window systems across Stockton and Billingham.
Free no-obligation quotes available
Hartlepool
Windows, Doors & Glazing
Expert uPVC specialists providing window replacements, composite door fitting and energy-efficient glazing across Hartlepool.
Full glazing & workmanship guarantee
Our Recent Work Across Teesside & Redcar
Craftsmanship you can see. Explore our real customer installations in windows, doors and glazing across Teesside.
On-Site Installation Team & Branded Transport Fleet
The Transform UK Developments family fitting team on site in Teesside with our fully equipped liveried service vehicle.
Anthracite Composite Door & uPVC Windows Suite
Modern anthracite grey composite entrance door with decorative obscure glazing and multi-point high security locking mechanism.
Energy Efficient uPVC Window Replacements
High performance A+ energy rated uPVC casement windows installed across the front elevation.
What Our Customers Say
Read real feedback from local families in New Marske, Redcar, Saltburn, Guisborough & Middlesbrough.
"I have used Transform UK, Redcar before and wouldn't use anyone else. Had a new back door fitted and absolutely love the look and quality. The guys keep in touch every step of the way, nothing is too much trouble, and they work quick, clean and friendly!"
Dorothy McKenna
Redcar, Teesside
"Had Gareth and Paul round fitting a new door for me. Great service and price. I honestly can't complain, cleaned all mess left and very happy with my new door!"
Harry Boyes
New Marske, Redcar
"Had Harry and Paul round to repair my composite door which was fitted by another company. Transform booked me in quickly and fixed it perfectly so no draft comes through for winter. Very friendly, quick and efficient!"
Local Homeowner
Saltburn-by-the-Sea
"This company was fabulous, I love my windows and doors! I had every window and door newly installed by them. Everything was done as I asked and nothing was too much for them. Totally nice bunch of guys to have around your home."
General Window Client
Guisborough, Cleveland