helping you grow your home
why stay dry extensions?
- Local Experts – Based in Oxfordshire, serving surrounding towns across Buckinghamshire & Oxon.
- Fully Insured & Accredited – Work completed to current UK building regulations.
- Weather-Resistant Builds – Our name says it all — we focus on waterproofing and durability.
- Quality Guarantee – Peace of mind for years to come.
- Transparent Quotes – No hidden costs or surprises.
- Personal Service – From a family-run team that treats every home like our own.
Ready to create your dream home extension?
Got any questions? Let’s plan it together.
Call us today: 0800 124 4646
Email: info@staydryextensions.co.uk
Or request your free quote online – we’ll reply within 24 hours.
Local – Affordable – Professional
Improving Your Home without breaking the bank
Stay Dry Extensions Limited provide amazing value for money property extensions in Oxford & Buckinghamshire.
We create beautifully crafted home extensions that fit the way you live — not the other way around.
Our team handles everything: from architectural design and planning applications to project management and construction.
We’re fully insured, FMB-accredited, and passionate about energy-efficient, watertight builds that enhance your property and your lifestyle.
At Stay Dry Extensions, we help homeowners transform their properties with stunning, durable, and energy-efficient extensions — all built to last through the British weather. From first design sketch to final handover, our experienced local team manages every detail — planning permission, structural work, waterproofing, and finishes — so you can relax knowing your project is in trusted hands.
We’re committed to craftsmanship, communication, and customer care. Whether you’re extending for more family space or future investment, we’ll deliver your dream build on time and on budget.
Popular Types of Affordable Extensions
Rear Extensions
Open up your living space and flood your home with light. Perfect for creating open-plan kitchen diners and family rooms that connect seamlessly to your garden.
Can add between 10 – 20% to the value of your home.
Wrap-Around Extensions
Make the most of every corner with an L-shaped wrap-around design — ideal for Victorian or semi-detached homes in Oxfordshire and Buckinghamshire.
Can add between 15 – 20% to the value of your home.
Side Return Extensions
Transform under-used side passages into bright, modern living areas. Gain valuable square footage and enhance your property’s flow and functionality.
Can add between 8 – 15% to the value of your home.
Kitchen Extensions
Upgrade your home with a spacious, stylish kitchen that’s perfect for family life and entertaining. Designed to your needs, built with precision.
Can add between 15 – 25% to the value of your home.
Design & Build Packages
We handle every stage — design, planning, permissions, and build — so you have a single, reliable point of contact throughout your project.
Double-Storey Extensions
Open up your living space and flood your home with light. Add new bedrooms upstairs and new rooms downstairs – really maximise the value of your home.
Can add between 25 – 35% to the value of your home.
Over Garage Extensions
Make good use of that space above your garage — ideal for homes with front garages in Oxfordshire and Buckinghamshire.
Can add between 15 – 20% to the value of your home.
Basement Extensions
Create excavated space in your home — ideal for homes short on footprint in Oxfordshire and Buckinghamshire.
Can add between 20 – 30% to the value of your home.
Design & Build Packages
We handle every stage — design, planning, permissions, and build — so you have a single, reliable point of contact throughout your project.
Rear Extensions
Open up your living space and flood your home with light. Perfect for creating open-plan kitchen diners and family rooms that connect seamlessly to your garden.
Can add between 10 – 20% to the value of your home.
Conservatory Extensions
Add a beautiful conservatory to your home — ideal for homes with rear gardens in Oxfordshire and Buckinghamshire.
Can add between 5 – 10% to the value of your home.
Orangery Extensions
Add a beautiful orangery to your garden — ideal for homes with rear or side gardens in Oxfordshire and Buckinghamshire.
Can add between 5 – 10% to the value of your home.
Design & Build Packages
We handle every stage — design, planning, permissions, and build — so you have a single, reliable point of contact throughout your project.
Call us : Monday to Saturday : 8 am – 6 pm
0800 124 4646
0800 124 4646
Covering all Oxford & Buckinghamshire
We proudly serve homes throughout Oxfordshire and Buckinghamshire, including:
Oxford, North Oxford, Summertown, Headington, Thame, Witney & Eynsham, Bicester, Henley-on-Thames, Kidlington, Chipping Norton & Burford, Beaconsfield, Marlow, Gerrards Cross, Princes Risborough, Banbury, Abingdon, Aylesbury, High Wycombe, Wendover, Great Missenden, Chalfont St Giles / St Peter and Amersham.
Oxfordshire
Buckinghamshire
Bicester
Banbury
Abingdon
Aylesbury
High Wycombe
Marlow
Amersham
Thame
Oxford
Didcot
Abingdon-on-Thames
Witney
Carterton
Kidlington
Wallingford
Henley-on-Thames
Beaconsfield
Gerrards Cross
Great Missenden
Chalfont St Giles
Chalfont St Peter
Princes Risborough
Wendover
Buckingham
Watlington
Summertown
Headington
Eynsham
Henley-on-Thames
Chipping Norton
Burford
Princes Risborough
Great Missenden
Frequently Asked Questions about Extensions
In most cases, yes. Experienced Oxford and Buckinghamshire builders can phase construction so you remain in your home with minimal disruption — especially for single-storey rear or side extensions.
If you would like to have a chat with us, ask any questions or get a quote, just call us free on 0800 124 4646
Prices vary by complexity, but most Oxfordshire builders charge between £1,800–£2,800 per m² for complete extensions. Get detailed, itemised quotes to compare finishes, labour, and materials.
If you would like to have a chat with us, ask any questions or get a quote, just call us free on 0800 124 4646
Absolutely. Many Buckinghamshire builders collaborate with architects and planning consultants to produce 3D designs, layout drawings, and planning submissions. Ask for a design-and-build package for smoother communication and cost control.
If you would like to have a chat with us, ask any questions or get a quote, just call us free on 0800 124 4646
Most professional Oxford extension builders manage the full process — from planning applications to building regulations and final completion. Many have in-house architects or work with local design partners familiar with Oxford City Council requirements.
If you would like to have a chat with us, ask any questions or get a quote, just call us free on 0800 124 4646
You can usually extend up to 3 m (terraced) or 4 m (detached) without permission, provided you don’t exceed 50% of your garden area and use similar materials. Always confirm with your council before you start.
If you would like to have a chat with us, ask any questions or get a quote, just call us free on 0800 124 4646
Yes most definitely — even a 10–15 m² side or rear extension can transform space usability and add up to 20% to property value when well-designed.
If you would like to have a chat with us, ask any questions or get a quote, just call us free on 0800 124 4646
Most single-storey extensions take 10–14 weeks from groundwork to completion. Two-storey or complex designs can take up to six months, depending on planning approval and weather.
If you would like to have a chat with us, ask any questions or get a quote, just call us free on 0800 124 4646
The average house extension in Oxford or Buckinghamshire costs between £1,800–£2,800 per m², depending on design, materials, and size. Single-storey builds start around £45,000, while two-storey extensions often exceed £80,000. For an accurate quote for your extension please contact us.
If you would like to have a chat with us, ask any questions or get a quote, just call us free on 0800 124 4646
For more FAQs on Planning & Regulations, Costs of Extensions, and General questions view our Frequently Asked Questions page.
Local – Affordable – Professional
Home Extension Options
You have many options for extending your home, these range from adding basements, to conservatories, through to full multi storey extensions.
