Trusted Oxfordshire Builders for Extensions & Windows

Your local experts for high-quality home extensions, windows, doors, and complete renovations. Professional, reliable, and based in Wantage.

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20+ Years Experience
100+ Projects Completed
4.9★ Rating
Serving All Oxfordshire

Fully Insured & Assured Registered

Assure Certified

Master Builders

Checkatrade

Fully Insured

Our Expert Building Services

Home Extensions

From single-storey additions to full wrap-around extensions, we manage your project from design to completion. We can provide brief advice on planning requirements and direct you to the Planning Portal for formal applications. Our builders in Oxfordshire specialize in creating beautiful, functional spaces that enhance your home's value and livability. Serving Wantage, Oxford, Abingdon, and throughout Oxfordshire.

Windows, Doors and Conservatories

As expert window fitters in Abingdon and across Oxfordshire, we install and replace all types of doors and windows, including uPVC, composite, and timber. As Assure certified installers, we can sign off all installations to building regulations. Energy-efficient solutions that improve security, aesthetics, and reduce heating costs. We also design and install beautiful conservatories in Victorian, Edwardian, and contemporary styles. Professional installation guaranteed by local Wantage builders.

Conversions

Maximize your property's potential with expert conversion services across Oxfordshire. Our garage conversions create functional living spaces, home gyms, or workshops with proper insulation, electrics, and building regulation compliance. We also design and build stunning garden rooms - perfect for home offices, entertainment spaces, or guest accommodations. Whether you need additional living space or want to add value to your property, our conversion specialists deliver quality craftsmanship with full project management from design through completion.

General Building & Renovations

From patios and brickwork to roofing and complete home renovations, our general building work in Didcot and across Oxfordshire is second to none. We handle projects of all sizes with the same commitment to quality craftsmanship, reliability, and customer satisfaction.

How We Work

Our proven 5-step process ensures your building project in Oxfordshire runs smoothly from start to finish, with complete transparency and professionalism at every stage.

1

Initial Consultation

We visit your property in Oxfordshire to discuss your vision, assess the space, take measurements, and understand your budget. This consultation is completely free with no obligation. We'll answer all your questions and provide expert advice on design, planning permissions, and feasibility.

2

Detailed Quote

Within 2-3 days, we provide a comprehensive written quote breaking down all costs including materials, labour, and any additional services. We pride ourselves on transparency - no hidden fees, no surprises. The quote includes a detailed timeline and specification of work.

3

Planning & Permits

If your project requires planning permission or building regulations approval, we handle all applications and liaise with Oxfordshire local authorities on your behalf. We have extensive experience with Vale of White Horse District Council and other Oxfordshire planning departments.

4

Professional Build

Our experienced team begins work with minimal disruption to your daily life. We maintain a clean, safe worksite, provide regular progress updates, and are always available to answer questions. Quality craftsmanship and attention to detail are guaranteed on every project.

5

Final Inspection

We conduct a thorough walkthrough with you to ensure everything meets your expectations and our high standards. We clean up completely, remove all waste, and provide you with all necessary documentation, warranties, and maintenance guidance for your new extension, windows, or conservatory.

Our Guarantee

Every project comes with:

  • Full workmanship guarantee
  • Comprehensive insurance coverage
  • After-care support and advice
  • Compliance with all building regulations
Modern grey composite door installation with professional exterior lighting by CJB Renovations LTD in Wantage, Oxfordshire

Your Local Wantage Builders

Based in the heart of Wantage, Oxfordshire, CJB Renovations LTD is your trusted partner for all building and renovation projects. We are proud local Wantage builders serving homeowners throughout Oxfordshire, including Oxford, Abingdon, Didcot, Bicester, and Kidlington.

With years of experience in home extensions Wantage, window and door installations, conservatories, and general building work, we combine traditional craftsmanship with modern techniques to deliver exceptional results every time.

Why choose CJB Renovations? We are fully insured, Assure registered, and committed to professionalism, reliability, and customer satisfaction. From initial consultation to project completion, we ensure your vision becomes reality with minimal disruption and maximum quality.

Contact Us Today

What Our Customers Say

Don't just take our word for it. Here's what homeowners across Oxfordshire say about working with CJB Renovations LTD.

"Absolutely brilliant service from start to finish. Our rear extension in Wantage was completed on time and to an exceptional standard. The team was professional, tidy, and always kept us informed. Couldn't recommend CJB Renovations more highly!"

SM

Sarah M.

Wantage

"We had new composite doors and windows fitted throughout our Abingdon home. The difference in both appearance and warmth is remarkable. The installation team was respectful, efficient, and the quality is outstanding. Great local builders!"

JD

John D.

Abingdon

"Our beautiful new conservatory in Bicester has transformed our home. CJB handled everything including planning permission. The craftsmanship is superb and we now have a wonderful space to enjoy year-round. Highly recommended!"

LT

Lisa T.

Bicester

20+
Years Experience
100+
Projects Completed
4.9★
Average Rating
100%
Customer Satisfaction

Serving All of Oxfordshire

Based in Wantage, we're your trusted local builders proudly serving homes and businesses throughout Oxfordshire with professional building, renovation, and installation services.

Wantage

Our home base. We provide comprehensive building services including home extensions, loft conversions, and window installations to residents throughout Wantage and surrounding villages.

Oxford

From historic city center properties to modern suburban homes, we handle all building work in Oxford with expertise in both traditional and contemporary construction methods.

Abingdon

Specialist window fitters and door installers serving Abingdon. We offer energy-efficient uPVC, composite, and timber installations with professional fitting guaranteed.

Didcot

General building work specialists in Didcot. From patios and driveways to full home renovations, we deliver quality craftsmanship on every project, large or small.

Bicester

Conservatory installation experts in Bicester. We design and build Victorian, Edwardian, and contemporary conservatories, managing planning permissions and complete construction.

Kidlington

Complete building and renovation services for Kidlington homes. Our local knowledge and expertise ensure projects are completed to the highest standards.

We Also Serve

Witney • Banbury • Thame • Henley-on-Thames • Wallingford • Faringdon • Carterton • Grove • Chipping Norton • Woodstock

And all surrounding villages and towns across Oxfordshire. If you're in Oxfordshire and need builders, we can help.

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Frequently Asked Questions

How much does a home extension cost in Oxfordshire?

The cost of a home extension in Oxfordshire typically ranges from £1,200 to £2,000 per square metre, depending on the complexity, size, and materials used. Single-storey extensions generally cost between £20,000 and £50,000, while two-storey extensions can range from £40,000 to £100,000. At CJB Renovations LTD, we provide transparent, no-obligation quotes tailored to your specific project in Wantage, Oxford, Abingdon, or any area across Oxfordshire. Factors affecting cost include planning permissions, structural work, and finishing standards.

How long does a conservatory installation take?

A typical conservatory installation in Bicester or elsewhere in Oxfordshire takes between 4 to 8 weeks from start to finish. This includes 1-2 weeks for base and foundation work, 2-3 weeks for frame construction and glazing, and 1-2 weeks for finishing touches including electrics, flooring, and decoration. Victorian and Edwardian designs typically take 5-6 weeks, while bespoke contemporary designs may require 7-8 weeks. CJB Renovations LTD manages the entire process, including planning permissions if required, ensuring minimal disruption to your home.

Do I need planning permission for an extension in Wantage?

Many home extensions in Wantage and Oxfordshire fall under Permitted Development rights and don't require full planning permission. Single-storey rear extensions up to 6 metres (8 metres for detached homes) typically don't need planning permission. However, you'll need permission if your property is in a conservation area, is a listed building, or if your extension exceeds permitted development limits. CJB Renovations LTD offers a free consultation to assess your project and advise on planning requirements, and we can manage the entire planning application process on your behalf if needed.

What types of windows and doors do you install?

As experienced window fitters in Abingdon and across Oxfordshire, we install uPVC windows and doors (excellent value, low maintenance, energy-efficient), composite doors (superior security, aesthetically appealing, highly durable), timber windows and doors (traditional appearance, sustainable, customizable), and aluminium frames (modern, slim profiles, maximum glazing). All our installations meet current Building Regulations for thermal efficiency and security standards. We provide A-rated energy efficiency as standard and offer a comprehensive guarantee on all installations.

Why choose CJB Renovations LTD for building work in Oxfordshire?

CJB Renovations LTD is your trusted choice for building work in Didcot, Wantage, Oxford, and throughout Oxfordshire because we are fully insured and Assure registered, providing complete peace of mind. We are local Wantage builders with extensive knowledge of the area and local building regulations. We offer transparent, competitive pricing with no hidden costs, maintaining high-quality craftsmanship on every project regardless of size. Our professional project management ensures minimal disruption to your daily life, and we have an excellent reputation built on customer satisfaction and quality work. We handle everything from initial consultation and planning to final completion and cleanup.

What areas in Oxfordshire do you serve?

CJB Renovations LTD proudly serves all of Oxfordshire, with our base in Wantage. We regularly complete projects in Wantage, Oxford, Abingdon, Didcot, Bicester, Kidlington, Witney, Banbury, Thame, Henley-on-Thames, and surrounding villages throughout Oxfordshire. As local builders, we understand Oxfordshire's unique architectural styles, local planning requirements, and the needs of homeowners in the area. No project is too far within Oxfordshire - contact us today for a free quote.

How quickly can you provide a quote?

We aim to provide initial quotes within 48 hours of your enquiry. For straightforward projects like window replacements or standard extensions, we can often provide an estimate over the phone or via email on the same day. For more complex projects requiring a site visit, we'll arrange a convenient time to visit your property in Oxfordshire, take measurements, discuss your requirements, and provide a detailed written quote typically within 2-3 working days. All our quotes are free, with no obligation, and completely transparent with a full breakdown of costs.

Get in Touch

Get your free, no-obligation quote today. We serve Wantage, Oxford, Abingdon, Didcot, Bicester, Kidlington, and all of Oxfordshire.

Opening Hours

Monday - Friday: 8:00 AM - 6:00 PM
Saturday: 9:00 AM - 2:00 PM
Sunday: Closed

We respond to enquiries within 2 hours during business hours

Call Us

01235 123 456

Email Us

info@cjbrenovations.ltd

Address

CJB Renovations LTD
41 Hamfield, Wantage
Oxfordshire, OX12 9EQ

Send Us an Enquiry