House Extensions in Bexley & Kent
Extend Your Home with a Trusted Family-Run Builder
Extending your home is one of the most effective ways to create more space without the stress and cost of moving.
Whether you’re looking to expand your kitchen, add a new bedroom, or open up your living area, a well-designed house extension can completely transform the way you use your home. With the rising property prices across Bexley and Kent, many homeowners are choosing to improve rather than relocate — gaining the extra space they need while increasing the long-term value of their property.
At P J Dunbar Builders Ltd, we’ve been building high-quality extensions for over 30 years, helping families create brighter, bigger, and better homes tailored to their lifestyle. From rear and side extensions to wraparound and double-storey additions, our experienced team handles everything from planning and design to construction and finishing.
Types of House Extensions We Build
Every home is different, which is why we offer a range of extension styles to suit your property, budget, and lifestyle. Whether you want something simple and functional or a large multi-storey addition, our experienced team will guide you through what’s possible and recommend the best solution for your space.
We can work directly with your architect or bring in our own trusted specialists to help design a build that fits your home perfectly.
Benefits of Extending Your Home
Create the Space Your Family Really Needs
From growing families to changing lifestyles, an extension gives you the freedom to add the rooms you’re missing — whether that's an open-plan kitchen, a larger living area, an extra bedroom, or a dedicated home office. It’s the simplest way to make your current home work better for you.
Increase the Value of Your Property
Extensions consistently add long-term value, especially in desirable areas like Bexley, Bexleyheath, and Dartford. A well-built extension not only increases square footage but also enhances layout, natural light, and overall appeal — all key factors buyers look for.
Avoid the Cost and Hassle of Moving
Between estate agent fees, legal costs, stamp duty, removals, and the stress of finding the “right” home, moving can be costly and disruptive. Extending allows you to stay in the location you love while gaining the extra space you need — without compromise.
Tailored to Your Lifestyle and Design Preferences
Every extension is designed around your needs — not a standard template.You can choose layouts, materials, glazing, architectural style, finishing touches, and even energy-efficient upgrades. It’s a chance to create a space that suits your life perfectly.
Modernise and Improve Older Properties
Many homes in Bexley and Kent benefit from modern layouts with better flow, more natural light, and improved insulation. An extension offers the perfect opportunity to open up tight rooms, improve energy efficiency, and bring older homes up to modern living standards.
Build a Space That Works Now — and in the Future
Whether you’re planning for a growing family, working from home more often, or simply wanting more comfortable living space, an extension lets you design for both current needs and long-term plans — making your home more flexible, functional, and future-proof.
Got Questions About Extending Your Home?
If you’re thinking about a house extension but aren’t quite sure where to start, we’re always happy to offer some friendly, no-obligation advice. Whether you want to discuss ideas, ask about planning permission, or simply understand what’s possible with your property, our team is here to help.
Our House Extension Process
With over 30 years of experience, we’ve refined a smooth, reliable process that keeps your project on track from the very first conversation to the final handover.
Whether you’re extending a terraced home in Bexley, a semi-detached property in Kent, or a larger family home in Bexleyheath, our approach ensures clarity, communication, and quality at every stage.
Free Consultation & Advice
We begin with an informal chat about your ideas, budget, and goals.
This is a chance for you to ask questions and for us to understand what you want to achieve. No pressure — just honest guidance from an experienced local builder.
Site Survey & Feasibility Assessment
If you’d like to proceed, we arrange a site visit to assess your property, take measurements, and identify what’s structurally possible.
We’ll talk through extension options, layout ideas, and any planning considerations that may apply in Bexley or Kent.
Architectural Design & Planning Permission
We can work with your architect or introduce one of our trusted partners to create detailed drawings.
From permitted development checks to full planning applications, we ensure everything is handled correctly so your project starts on solid ground.
Pre-Construction Planning
Before work begins, we finalise all specifications, agree on timelines, confirm materials, and set out the construction schedule.
You’ll know exactly what to expect, with clear communication throughout — no hidden surprises.
Construction & Quality Control
Our skilled in-house team carries out the build with care, precision, and respect for your home.
A dedicated project lead oversees progress, keeps you updated, and ensures work meets our highest standards. We manage everything — structure, electrics, plumbing, finishes, and more.
Final Sign-Off & Aftercare
Once the build is complete, we walk you through the finished extension, make sure you’re 100% satisfied, and handle any final touches.
Our work is guaranteed, and we’re always here if you need support or further improvements in the future.
Trusted Local Builders With Over 30 Years of Experience
Since 1994, P J Dunbar Builders Ltd has been delivering high-quality house extensions across Bexley, Kent, and South East London.
Our longevity comes from doing things properly — using skilled tradespeople, providing clear and honest advice, and building every extension with the care and attention it deserves. Most of our work comes from personal recommendations, and our clients choose us because they know their home is in safe, experienced hands.
If you want a builder who turns up, communicates clearly, and takes pride in every detail, we’re here to help.
Decades of Experience
Established in 1994, our team brings more than 30 years of proven building knowledge to every project, large or small.
Family-Run & Local Since 1994
As a Bexley-based company, we value personal service, clear communication, and genuine care for every client’s home.
Complete Design-to-Build Service
From initial design to final construction, we manage every stage in-house to keep your project organised, efficient and stress-free.
Transparent & Honest Pricing
We believe in honesty from start to finish. You’ll always know what you’re paying for — no hidden extras or unexpected costs.
Trusted by Homeowners Across Bexley & Kent
For over 30 years, we’ve built our reputation on quality, reliability, and customer satisfaction. Here’s what our clients have to say about working with us.
Recent House Extension Projects
Take a look at some of the house extensions we’ve recently completed across Bexley, Bexleyheath, Dartford, and the surrounding areas of Kent. From modern kitchen extensions to spacious double-storey additions, each project reflects our commitment to quality, craftsmanship, and attention to detail.
Every extension is designed around the homeowner’s needs and built by our long-standing, skilled team — ensuring a finish that looks great, performs well, and adds lasting value to the property.
House Extension FAQs
If you’re planning a house extension for the first time, it’s normal to have questions.Here are some of the most common things homeowners in Bexley, Kent, and South East London ask us before starting their project.
Costs vary depending on size, design, materials, and whether the extension is single or double storey. After a site visit, we provide a clear, itemised quote with no hidden extras. If you’d like a more accurate estimate, we’re always happy to take a look at your property.
Many extensions fall under permitted development, meaning planning permission isn’t required — but it depends on the size, height, and location of the extension. We’ll guide you through whether planning is needed and handle the entire application process if required.
In most cases, no. We organise the build so your home remains safe and functional throughout the project. We always keep disruption to a minimum and maintain a clean, tidy worksite.
Yes. From the first consultation and site survey to planning, construction, and final handover, we manage the entire process. You’ll have one point of contact throughout, making the project simple, organised, and stress-free.
A typical single-storey extension takes around 8–12 weeks, while larger or double-storey projects may take longer. Once your plans are finalised, we’ll give you a clear project timeline so you know exactly what to expect.
Yes. We can work with your existing architect or introduce one of our trusted partners. We can also arrange structural engineer reports and building control approvals to ensure everything is compliant and ready for construction.
Yes — a well-built extension almost always increases property value, especially in sought-after areas like Bexley, Bexleyheath, and Dartford. More space, better layout, and modern living areas are highly attractive to future buyers.
Just get in touch. We’ll arrange a friendly, no-obligation chat and, if you’d like, a site visit to discuss ideas and help you understand what’s possible with your home.
Still have questions?
If you didn’t find what you were looking for, our team is happy to help.
Get in touch today for friendly, no-obligation advice about your extension, renovation, or new-build project in Bexley or Kent.
Ready to Start Your House Extension?
If you’re ready to create more space, improve your home, and add long-term value, we’d love to help bring your plans to life. Whether you’re at the early idea stage or already have drawings in place, our team can offer clear guidance, honest advice, and a free, no-obligation estimate.
We’ve been building extensions across Bexley, Bexleyheath, Dartford, and Kent for over 30 years — and we’re here to make your project simple, smooth, and stress-free.