Extend Your Home. Not Your Stress.
Greenways Sussex deliver expertly built home extensions across Brighton, Hove, Worthing and the wider Sussex area. From groundworks to final finish — one trusted team, one fixed price, zero surprises.
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Why extend rather
than move?
The average cost of moving home in the UK — including stamp duty, estate agent fees, legal costs and removals — exceeds £30,000. A well-planned extension gives you the space you need, adds up to 20% to your property value, and lets you stay in the neighbourhood you love.
A single-storey extension typically adds 10–15% to your home's value. A double-storey can add up to 20%.
Open-plan kitchen-diners, extra bedrooms, home offices — an extension is designed around how you actually live.
Avoid stamp duty, estate agent fees and the upheaval of moving. Extend for a fraction of the cost.
Before
After
Every type of home extension, built right
From compact kitchen extensions to full wraparound builds, we handle every stage — groundworks, structure, roofing, glazing and internal fit-out.
Most Popular
Single-Storey Rear Extension
The most common type — extends the back of your home to create a larger kitchen, dining room or living space. Often permitted development, meaning no planning permission required.
- Up to 8m under permitted development (detached)
- Ideal for open-plan kitchen-diners
- Lantern roofs and bifold doors available
- Build time: 10–16 weeks on site
Best Value
Double-Storey Extension
Add a bedroom above and living space below for significantly more space at a lower cost per m² than a single-storey build. Foundations and roof costs are shared across two floors.
- Up to 200% more space for 50–70% more cost
- Planning permission typically required
- Adds a bedroom + downstairs living space
- Build time: 16–24 weeks on site
Side Return Extension
Perfect for Victorian and Edwardian terraces, a side return extension fills the narrow alley beside your home to dramatically transform your kitchen into a wide, light-filled space.
- Transforms narrow terraced kitchens
- Often combined with rear extension (wraparound)
- Rooflights and glazed roofs maximise light
- Build time: 12–18 weeks on site
Maximum Space
Wraparound Extension
Combines a rear extension with a side return to create an L-shaped addition that maximises every square metre of available space. The ultimate transformation for terraced and semi-detached homes.
- L-shaped design maximises ground floor space
- Planning permission usually required
- Ideal for large open-plan living areas
- Build time: 20–28 weeks on site
Kitchen Extension
The most popular reason to extend. Creates the open-plan kitchen-diner that modern family life demands — with room for an island, a dining table, and a direct connection to the garden.
- Bifold or sliding doors to garden
- Lantern or flat roof with rooflights
- Adds up to 10% to property value
- Build time: 10–16 weeks on site
Foundations & Groundworks
Our specialist groundworks team handles foundations, drainage, concrete slabs and substructure work — whether you need us for the full build or just the groundworks stage.
- Strip, raft and pad foundations
- Drainage design and installation
- Concrete slab and DPC installation
- Structural engineer liaison
No obligation. We visit, assess and provide a detailed written quote — usually within 5 working days.
Real projects. Real results. Real reviews.
Homeowners across Sussex trust Greenways to get the groundwork right — and deliver a finish they're proud of.
"Great team - very knowledgeable and went over and above to get the work done. Gave great advice and really a one stop shop for top quality work."
"We had three quotes for our side return kitchen extension. Greenways weren't the cheapest but they were by far the most thorough — they came back with a detailed spec, explained the permitted development rules clearly, and their project manager was on site every day. The result is stunning."
"Fantastic service from Greenways Sussex. Not only was the price spot on, but the after-care and clean-up were absolutely first class. Rhys and the team kept everything running smoothly and finished on schedule, ready for the next stage of the build. I'd happily recommend them to anyone."
Join 500+ Sussex homeowners who've trusted Greenways with their extension
Built for homeowners who want it done properly
We're not a sales company that subcontracts the work. We're a Sussex-based construction team with 30+ years of experience who take personal responsibility for every project.
Groundworks Specialists First
Most builders subcontract their groundworks. We do it ourselves. Our team has specialist expertise in foundations, drainage and substructure — the elements that determine whether your extension lasts 10 years or 100.
Fixed-Price Quotes, No Surprises
We provide fully itemised, fixed-price written quotations. What we quote is what you pay — unless you change the scope. No hidden extras, no retrospective charges, no nasty surprises at the end.
Dedicated Project Manager
Every project has a named project manager who is your single point of contact from first site visit to final handover. You'll always know what's happening, when, and who to call.
Planning & Regulations Managed
We handle permitted development notifications, planning applications and building regulations submissions. You don't need to navigate the council — we do it for you.
Genuinely Local to Sussex
We're not a national franchise. We're a Sussex-based team who know the local planning authorities, the local soil conditions, and the local building styles. Our reputation in this county is everything to us.
Full Certification on Completion
We provide all building regulations completion certificates, structural warranties and documentation on handover — essential for your records and for future property sales.
Answers to the questions every homeowner asks
We've answered hundreds of homeowner questions over 30 years. Here are the ones that come up most often. If yours isn't here, just call us.
Call 01273 569 252Home extensions across Sussex
We build throughout East and West Sussex. If you're not sure whether we cover your area, just give us a call.
Not sure if we cover you?
Give us a call or drop us a message — we'll let you know straight away.
Book your free site visit
The first step is simple. We visit your home, listen to your ideas, assess what's possible and give you honest, practical advice — completely free and with no obligation to proceed.
Tell Us About Your Project
Fill in the form and we'll be in touch within one working day to arrange your free, no-obligation site visit. All enquiries go directly into our job management system so nothing gets missed.
Let's Transform
Your Property
Tell us about your project and we'll arrange a free, no-obligation site survey — honest advice, no pushy sales.
Let's Transform
Your Property
Get a free, no-obligation site survey from our expert team. We cover Brighton, Hove and all of Sussex — honest advice, no pushy sales.
Book Your Free Survey
Fill in the form below and we'll be in touch within one working day to arrange a free, no-obligation site visit. All enquiries go directly into our job management system so nothing gets missed.