Garage Conversion Design Services
Existing Footprint, New Living Space. Sussex & Surrey.
Why Sussex Homeowners Trust ArchEvolve With Garage Conversions
- 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.
Garage Conversions Alongside Related Services
Garage Conversions: Where Damp and Building Regs Get Overlooked
Common challenges
- Damp proofing overlooked until problems appear after completion
- Floor levels that do not match the rest of the house
- Insufficient insulation leaving the room cold and unusable
- Structural openings left unresolved where the garage door was
- Drainage and services not accounted for in the design
- Assuming no planning permission or Building Regulations are needed
How ArchEvolve solves them
- Damp proof course and floor build-up specified correctly from the outset
- Floor levels designed to tie in seamlessly with adjoining rooms
- Insulation specification meeting current thermal standards
- Structural infill of the garage door opening designed and calculated
- Full Building Regulations application prepared and submitted
- Full Building Regulations application prepared and submitted
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 Garage Conversions in Sussex and Surrey
3D Visualisations Included
Every garage conversion 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 garage conversion timeline on track.
Local Planning Knowledge
ArchEvolve has submitted garage conversion 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 garage conversion project personally. No handoffs, no junior staff taking over mid-project.
Garage Conversion Design Across Sussex and Surrey
Most internal garage conversions that do not change the external appearance fall under permitted development. If you are altering the garage door opening, adding windows to a side elevation, or the property is in a conservation area, full planning permission may be required. ArchEvolve confirms your specific position at the free initial consultation.
Yes, in all cases. Garages are not built to habitable room standards, so Building Regulations approval covering damp proofing, insulation, ventilation, fire safety and structural work is always required, regardless of whether planning permission is needed.
Costs depend on the condition of the existing structure, floor build-up requirements and specification. Our garage conversion cost guide sets out typical UK price ranges.
Yes, integral garages are usually the most straightforward to convert since they already share a wall with the main house, simplifying access, services and structural connections.
Damp. Garages are rarely built with the same damp proofing as habitable rooms. ArchEvolve specifies the correct damp proof course and floor build-up as standard, so this does not become a problem after the room is finished and decorated.
In some cases, a partial conversion retains a smaller storage area while converting the rest to habitable space. ArchEvolve assesses this option at the feasibility stage based on your garage dimensions and storage needs.
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
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