Double storey extensions in Essex & East London
Double Storey Extensions in Essex & East London
A double storey extension adds space to your ground floor and upper level at the same time, so you can expand living areas downstairs and add bedrooms or bathrooms upstairs.
It is a popular, cost-effective alternative to moving across Essex and East London, giving growing families far more flexibility.
- Free survey and quote
- Fixed, itemised pricing
- 10-year structural guarantee
How it works
What is a double storey extension?
A double storey extension is a two-level addition, usually to the rear or side of your property. It typically includes:
- A ground floor expansion, such as an open-plan kitchen or living area
- A first floor expansion above, such as bedrooms or bathrooms
- A pitched or crown roof designed to blend with the existing roofline
- Brickwork, render and windows matched to the original house
Compared with a single-storey extension plus a separate loft conversion, a double storey extension is often the most cost-effective way to gain space, because the foundations and roof serve two floors.
Benefits
Why homeowners choose double storey extensions
Double storey extensions suit homeowners who love their location but have outgrown their home.
- A large increase in floor space across two levels
- Cost-effective per square metre
- The chance to redesign living and sleeping areas
- Avoids the costs and hassle of moving
- Adds substantial value to your property
Uses
What can a double storey extension be used for?
Because it spans two floors, a double storey extension offers plenty of options.
- Open-plan kitchens and family rooms
- Extra bedrooms
- New bathrooms or ensuites
- Home offices
- Larger landings and storage
Planning & regulations
Planning permission
Double storey extensions usually need a full planning application, although some may fall under permitted development. It depends on:
- The depth and height of the extension
- The location of the property
- Whether the property is in a conservation area
- Previous extensions or alterations to the home
Where required, planning permission is obtained as part of the project preparation. Whatever the planning position, all work must comply with Building Regulations, including structural integrity, fire safety, insulation and access.
Our process
A straightforward approach from start to finish
Great projects are built on clear communication, careful planning and a commitment to quality.
Initial Consultation
We visit, survey the property and talk through your ideas, needs and budget.
Quote & Programme
An itemised quotation plus a programme of works showing each stage.
Construction
Our experienced team builds to the agreed programme, keeping the site tidy.
Completion & Handover
Quality checks, a walk-through, documentation and a 12-month defects period.
Related services
Other extension options
FAQs
Double storey extension questions
Can’t see your question? Call us on 020 3488 1988 or send us a message and we’ll be happy to help.
Do double storey extensions need planning permission?
In most cases, yes. Two-storey extensions usually need a full planning application because of their size and impact on neighbours. We prepare the drawings and handle the application as part of the project.
How much does a home extension cost in Essex?
The cost depends on the size, design and specification. In the UK, extensions typically cost around £1,800 to £3,000 per m², so a 30m² extension could cost roughly £60,000 to £90,000+ depending on finishes and structural requirements.
How long does it take to build a home extension?
Most home extensions take 10 to 18 weeks to complete, depending on the size and complexity of the build, planning approvals and the weather.
Can I live in my home during the build?
In most cases, yes. Structural work is completed externally first, before we break through to the existing house.
Do extensions need Building Regulations approval?
Yes. All home extensions must comply with UK Building Regulations, covering structural stability, insulation, fire safety, ventilation and drainage.
Is a double storey extension cheaper than a single storey extension plus a loft conversion?
Often it is more cost-effective per square metre, because the groundworks, foundations and roof cover two floors of new living space. We give you an itemised quote so you can compare options.
Discuss your double storey extension
We can advise on feasibility, design options and the construction process. Call 020 3488 1988 or request a free quote.