More space for the way you want to live.
A carefully planned extension can transform far more than the size of your home. It can create a brighter kitchen, bring the family together, make room for working from home, or simply give you the space to stay in the home and area you already love.
At 1 Stop Building Services, we manage the complete project — from your first ideas and drawings through to construction, finishing and handover. With one experienced team coordinating every stage, the process is clearer, simpler and easier to manage.
Drawings to completion · One dedicated team · Southend & across Essex
Extend the home you love.
When your home no longer gives you the space you need, moving is not the only answer.
A well-designed extension can improve the flow of your entire property, bring more natural light into previously dark rooms and give everyday life the space it has been missing. More importantly, it can be designed around you — your routines, your priorities and the way you want to live — rather than around the compromises of another house.
Whether you are imagining an open-plan kitchen and dining space, an additional bedroom, a home office or a complete ground-floor transformation, we can help turn the initial idea into a clear, practical project.
Extensions designed around real life.
Rear extensions
Open up the back of your home to create a generous kitchen, dining or family space, with a stronger connection between your living areas and the garden.
Side-return extensions
Make productive use of the space beside your property. A side-return extension can widen narrow rooms, improve natural light and unlock layouts that previously felt impossible.
Wraparound extensions
Combine rear and side extensions to create a substantial new living area and completely rethink how your ground floor works.
Double-storey extensions
Add valuable space across two floors, creating opportunities for larger bedrooms, additional bathrooms and more flexible family living.
Kitchen extensions
Create a brighter, more sociable heart to your home, with space to cook, eat, relax and spend time together without feeling crowded.
Garden room extensions
Introduce light, views and an easy connection to the outdoors with a modern living space designed to complement the existing house.
Designed to belong.
The best extensions do not feel like an afterthought.
We carefully consider proportions, materials, rooflines, brickwork and the relationship between the new and existing parts of your home. Internally, we look beyond the additional square metres to consider natural light, movement, storage and how each room will actually be used.
The result is an extension that feels settled, coherent and genuinely useful — not simply something added to the back of the house.
One team. The complete build.
Building an extension involves far more than brickwork. Architectural design, planning, structural calculations, building control, plumbing, electrics and finishing all need to come together in the right order.
We coordinate the entire journey, giving you one experienced team and one clear point of contact throughout the project.
Depending on the stage your project has reached, we can help with:
- Initial ideas and practical advice
- Architectural drawings and specifications
- Planning applications and permitted development
- Structural calculations
- Building Regulations and building control
- Groundworks, drainage and foundations
- Structural alterations and steelwork
- Brickwork, roofing, windows and doors
- Plumbing, heating and electrical work
- Kitchens, bathrooms and internal finishes
- Plastering, flooring and decoration
- Final inspections, certification and handover
Whether you are starting with an idea or already have drawings and permissions in place, we can help take your project through to completion.
A clearer way to build.
01 — Listen & explore
We begin by understanding your home, your priorities and what you want the additional space to make possible.
We will talk through practical options, likely costs and the best route forward, giving you a clear understanding of what your project could involve before construction begins.
02 — Design & plan
Your ideas become a clear, buildable plan.
We coordinate drawings, structural requirements, specifications and any necessary permissions, making sure the important details are considered before work starts on site.
03 — Build & manage
Our team manages the construction, specialist trades, materials and day-to-day programme.
We keep you informed throughout the build, so you know what is happening, what comes next and who to speak to if you have a question.
04 — Finish & hand over
We complete the internal finishes, carry out the final checks and make sure everything is ready for handover.
The result is a finished space that feels like a natural part of your home — ready to become part of everyday life.
Capable enough for the whole project. Close enough to care about every detail.
Having building work carried out in your home requires trust.
You need a team that turns up, communicates clearly and treats your property with care — not one you have to chase whenever you need an answer.
With decades of combined experience, full insurance and a long record of successful local projects, 1 Stop Building Services brings together the capability to manage substantial building work with the personal involvement you want when work is taking place in your home.
- One accountable team from beginning to end
- Experienced, qualified tradespeople
- Clear communication throughout the project
- Careful coordination of every stage
- Fully insured and guaranteed work
- An established reputation across Southend and Essex
What our customers say
“The whole process was smooth and stress-free.”
“We used 1 Stop Building for our single-storey rear extension and couldn’t be happier. The team were professional, friendly and kept everything on schedule. The quality of the work is excellent and we’re thrilled with the result.”
— Extension customer, Essex
Frequently asked questions
Do I need planning permission for an extension?
Not always. Some extensions can be completed under permitted development rights, depending on the property and the size and position of the proposed work.
We can help establish which route is likely to apply and coordinate the necessary drawings and applications.
Can you manage the entire extension?
Yes. We can manage the complete project, including drawings, planning, structural calculations, building control, construction, specialist trades and final finishes.
If you already have plans or permissions in place, we can also take the project forward from that stage.
How much does a home extension cost?
The final cost will depend on factors such as the size and structure of the extension, access to the property, the specification and the level of internal finishing required.
Once we understand what you are planning, we can provide realistic guidance and prepare a detailed quotation based on your home and requirements.
How long does an extension take?
Timescales vary depending on the size and complexity of the project.
Before work begins, we will explain the anticipated programme and keep you updated as construction progresses, so you have a clear understanding of what to expect.
Can we remain living in the house during the work?
In many cases, yes.
We will discuss access, temporary services and how the work can be organised to minimise disruption to your household. For more extensive structural projects, there may be stages where alternative arrangements are more practical.
Where do you work?
We build extensions throughout Southend-on-Sea and the surrounding areas of Essex.
Send us your postcode and a brief description of your plans, and we will let you know whether your project falls within our working area.
Have a project in mind?
Let’s create more space for life.
Tell us what you would like to change about your home.
Whether you already have completed drawings or your idea is still taking shape, we would be happy to talk through the possibilities, answer your questions and discuss the best way to move forward.
Start a conversation
07908 430005