Glass Extension Design Services
Bring the Garden Into the Room. Sussex & Surrey.
Why Sussex Homeowners Trust ArchEvolve With Glass Extensions
- 15 years of experience
- 350 planning approvals secured
- 500 projects completed
- Revit 3D modelling as standard
- MCIAT-chartered accreditation
Posted on Google Jonathan GilbertTrustindex verifies that the original source of the review is Google. I would highly recommend Alex and his company. He has amazing suggestions as well as taking into account our preferences and ideas too. He is easily accessible and has been so helpful in answering all our many questions! Looking forward to seeing our vision come to life!Posted on Google James RileyTrustindex verifies that the original source of the review is Google. Alex was really helpful throughout the whole process. This was our first ever project like this and he was on hand to answer MANY questions!Posted on Google Nick RutterTrustindex verifies that the original source of the review is Google. Alex was so helpful from start to finish, great communication throughout. Would strongly recommend and will definitely use their services again in the future!Posted on Google arron tullyTrustindex verifies that the original source of the review is Google. Alex at Arch Evolve assisted with obtaining planning permission for a couple of extensions that we were intending on doing. Very professional and offered allot of very helpful advice. Very Happy Thank you.Posted on Google Marcus EatonTrustindex verifies that the original source of the review is Google. I have worked with Alex on many projects over the years and he has always been brilliant! Looking forward to working together again soon. Very professional and smooth process throughout the whole process.Posted on Google Charlotte MorleyTrustindex verifies that the original source of the review is Google. Archevolve has completed a number of plans for us due to changing my mind regularly. They have been consistently patient & listened to my requirements at all time. Alex has then been on hand for our builders if required. Fantastic company & highly recommendedPosted on Google Peter ProtoTrustindex verifies that the original source of the review is Google. Used Alex for our large project, loft conversion, side garage and rear extension. Unbelievable service from start to finish. We are over the moon with the finish. Thank you so much!!Posted on Google Tony MaioTrustindex verifies that the original source of the review is Google. Great service, they had an excellent understanding of my requirements. They applied great attention to detail, with a fast and very efficient service together very reasonable costs. I highly recommend this firm.
Glass Extensions Alongside Related Services
Glass Extensions: Where Structure Meets Solar Performance
Common challenges
- Structural steels sized incorrectly, leaving visible bulky beams
- Overheating in summer from unmanaged solar gain
- Heat loss in winter from poorly specified glazing
- Condensation issues from inadequate ventilation strategy
- Roof glazing and wall glazing not designed as one system
- Planning concerns over the visual impact of large glazed areas
How ArchEvolve solves them
- Structural glazing systems specified to minimise visible steelwork
- Solar control glass and shading strategy modelled at design stage
- Glazing specification balanced for both winter heat retention and summer comfort
- Ventilation strategy designed in from the outset to prevent condensation
- Roof and wall glazing designed as a single coordinated system
- Roof and wall glazing designed as a single coordinated system
How an ArchEvolve Project Works

Initial Consultation


Feasibility Assessment


Concept Design


Planning Application


Building Regulations


Construction Drawings


Construction Support

years of experience
Planning approvals
projects completed
largest construction project developed
Proudly Serving Homeowners Across Sussex and Surrey
A Different Standard of Design for Glass Extensions in Sussex and Surrey
3D Visualisations Included
Every glass extension project is modelled in Revit and rendered in Enscape. You see accurate light, materials and spatial quality before a planning application goes in.
Faster Planning Submissions
Drawings produced in a coordinated 3D environment are more complete and less prone to officer queries, which keeps your glass extension timeline on track.
Local Planning Knowledge
ArchEvolve has submitted glass extension applications across West Sussex, East Sussex and Surrey planning authorities. Your submission is prepared for the specific council from day one.
End-to-End Service
From feasibility through to construction drawings, Alex Page manages every stage of your glass extension project personally. No handoffs, no junior staff taking over mid-project.
Glass Extension Design Across Sussex and Surrey
This depends on size and position rather than the amount of glazing itself, so many glass extensions follow the same permitted development rules as a standard rear extension. ArchEvolve confirms your specific position at the free initial consultation.
Glass extensions typically cost more than a standard extension of the same size due to the glazing specification and structural requirements. See our house extension cost guide for general extension cost context.
Only if the glazing specification and shading strategy are not properly designed. ArchEvolve models solar gain at concept stage and specifies solar control glass and shading where needed to keep the room comfortable year-round.
Yes, provided the glazing specification addresses both winter heat loss and summer solar gain. This is a core part of the design brief for every glass extension ArchEvolve delivers.
Yes. Large spans of glazing need to be supported by carefully sized structural elements, ideally minimised so they do not interrupt the glazed effect. ArchEvolve coordinates this directly with a structural engineer during design.
The service covers feasibility assessment, structural glazing coordination, 3D concept design with Enscape visualisation, planning application, full Building Regulations drawings, and construction drawings for your builder.
ArchEvolve covers West Sussex, East Sussex and Surrey, including Worthing, Horsham, Chichester, Crawley, Guildford and Brighton, with a free initial consultation offered throughout the region.
Frequently Asked Questions
Start Your Glass Extension Design Today