Home Extensions in Oxfordshire & Buckinghamshire
Local – Affordable – Professional
Transform Your Home with Stay Dry Extensions
At Stay Dry Extensions, we design and build beautiful, durable, and energy-efficient home extensions across Oxfordshire and Buckinghamshire. Whether you’re outgrowing your space, modernising your layout, or increasing your property’s value, our experienced local team delivers seamless results — from first design sketch to final handover.
We specialise in planning, waterproofing, and building regulations compliance, so you can relax knowing every detail is handled by trusted professionals. Scroll down for options…
Local – Affordable – Professional
Our home extension services
Every home and family is different — that’s why we tailor each extension to your property, lifestyle, and budget.
So what are the options and what kind of value will they add to my home? Lets see…
Rear Extensions
The most popular way to expand your home. A rear extension extends your property into the garden, creating bright, open-plan living spaces perfect for modern family life.
Ideal for: kitchen-diner layouts, bi-fold doors, and improving indoor-outdoor flow.
Can add from 10% – 20% to the value of your home
Side Return Extensions
Transform your unused side passage into practical, stylish living space. Side return extensions are perfect for Victorian and Edwardian homes in Oxford, Aylesbury, and High Wycombe.
Ideal for: kitchens, dining rooms, or utility areas.
Can add from 8% – 15% to the value of your home
Wrap-Around (L-Shaped) Extensions
Combine a rear and side extension for maximum space and impact. Our wrap-around builds create stunning open-plan kitchen-living areas and add up to 25% to your home’s value.
Ideal for: semi-detached and period properties across Bucks and Oxon.
Can add from 15% – 20% to the value of your home
Double-Storey Extensions
Need more bedrooms or a home office? A double-storey extension adds living and sleeping space in one go — increasing comfort and boosting long-term resale value.
Can add from 25% – 35% to the value of your home
Kitchen Extensions
The heart of the home deserves room to breathe. We design kitchen extensions that blend functionality, style, and natural light — perfect for entertaining and family life.
Can add from 15% – 25% to the value of your home
Garage Conversions
Make the most of your existing footprint. Add an extra bedroom, office, or studio with smart conversions that enhance both usability and property value.
Can add from 15% – 20% to the value of your home
Local Extension Experts
We proudly serve homeowners across Oxfordshire and Buckinghamshire, including:
Oxford, Bicester, Banbury, Abingdon, Aylesbury, Thame, High Wycombe, Amersham, and surrounding villages.
Our team understands local architecture, planning authorities, and building regulations — making your project smooth from start to finish.
Passionate – Dedicated – Professional
Frequently Asked Questions
Here are some questions that home owners in Oxfordshire & Buckinghamshire often ask about the cost of adding a home extension, or about planning and regulation requirements, and other generl home extension questions.
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
Many small extensions fall under permitted development rights, but if your property is listed or in a conservation area, you’ll likely need full planning permission. Always check with your local council (Oxford City Council or Buckinghamshire Council) before starting work.
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
A side return extension fills the narrow alley beside a semi-detached or terraced house, while a wrap-around combines a side and rear extension to form an L-shape — ideal for open-plan kitchen-diner layouts.
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
Each district (e.g., Aylesbury Vale, Cherwell, South Oxfordshire) has slightly different guidelines. Generally, extensions must not exceed half the original house’s footprint and should be built with materials matching the existing property.
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
Expect to pay between £1,800–£2,800 per m² for standard builds, and up to £3,000/m² for premium finishes or complex structures like basements.
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 — a two-storey extension generally offers better value per square metre, since the roof and foundation are shared.
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
Simplify the layout, avoid bespoke glazing, reuse existing foundations if possible, and hire an experienced local extension builder such a Stay Dry Extensions Limited to minimise delays.
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
Open-plan kitchen-diner layouts with large bifold doors are currently trending.
Many Oxfordshire homeowners combine rear extensions with skylights or vaulted ceilings to maximise natural light.
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
Use insulated timber frames, triple glazing, and solar or heat-pump systems. Local architects in Oxford and Buckinghamshire can advise on sustainable planning 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
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
If your extension work affects a shared wall or boundary, you must serve a party wall notice to neighbours at least two months before starting work.
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 — Buckinghamshire has many reputable contractors serving Aylesbury, High Wycombe, and Amersham. Always choose builders with recent local case studies, transparent pricing, and verified public liability insurance.
Stay Dry Extensions Limited provide services in your area and are highly recommended.
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
Start by checking local, well-reviewed builders in Oxford who specialise in home extensions. Look for reviews on Trust-a-trader, and Google Maps. Local Oxfordshire specialists understand planning rules and can deliver faster, more compliant results.
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
Expect a lead time of 6–10 weeks from quote acceptance to project start. Demand in Oxford is high, especially in spring and summer, so booking early ensures availability.
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
Often yes. Local builders in Oxford and Buckinghamshire have lower overheads and better supplier relationships, meaning more competitive pricing and faster turnaround times. This is certainly the case for Stay Dry Extensions Limited who can offer you a great deal.
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
Yes — most local builders in Oxfordshire and Buckinghamshire offer free, no-obligation quotes and site visits. This helps you compare options and check compatibility before committing.
If you would like to have a chat with us, ask any questions or get a free quote, just call us free on 0800 124 4646
Request a fixed-price contract with all materials and planning fees listed. Transparent builders will include groundwork, electrical, and plumbing costs upfront. It is really important to discuss this sort of thing with the company you use 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
Many do. Full-service design-and-build companies manage everything — from initial plans and planning permission to structural work, electrics, and finishing. This saves time and reduces communication gaps between trades.
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 around 12–14 weeks, while two-storey builds can take up to six months depending on design and weather conditions.
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
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
Always confirm. Reputable builders include building control inspections and certification in their total quote. These approvals are essential for resale and insurance compliance.
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
Verify the builder’s Company House registration, insurance documents, and Trust-a-Trader membership. Review their Google Business Profile for consistent address details and client reviews.
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
Professional builders typically offer a 10-year structural warranty, alongside guarantees for specific elements like roofing or electrics. Always get these in writing.
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
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?
Let’s plan it together.
Call us today: 01234 567 890
Email: info@staydryextensions.co.uk
Or request your free quote online – we’ll reply within 24 hours.
Passionate – Dedicated – Professional
Extension Options & insights
Useful information on the various types of home extensions that are popular in Oxford & Buckinghamshire
