A double storey extension is one of the most effective ways to increase space and value in your home, especially in areas like Furzedown, Wandsworth where moving house can be expensive and disruptive. Instead of relocating, many homeowners are choosing to extend upward and outward, creating additional living space while staying in a familiar neighbourhood.
From larger kitchens to extra bedrooms, a double storey extension can transform how your home functions. But before starting, there are key planning, design, and construction factors that shape how successful your project will be.
“Did You Know? A double storey extension often costs less per square metre compared to building two separate single storey extensions, making it a more efficient way to gain space.”
Key Takeaways
- Double storey extensions add significant space and value
- Planning permission is usually required
- Design must match the existing property and surroundings
- Building regulations ensure safety and performance
- Costs depend on size, materials, and complexity
- Proper planning helps avoid delays and extra expenses
- Professional support improves project outcomes
Why Choose a Double Storey Extension in Furzedown?
Furzedown is known for its residential streets, period homes, and growing demand for space. A single storey extension may solve short-term needs, but a double storey option offers far greater long-term benefits.
More Space Without Losing Garden Area
By building upward, you maximise floor space without taking too much from your outdoor area.
Increased Property Value
Adding an extra floor can significantly raise the value of your home, especially when it includes additional bedrooms or bathrooms.
Better Layout Options
You can redesign both ground and first floors to create a more practical layout for modern living.
What Can You Add With a Double Storey Extension?
A well-planned extension can completely reshape your home. Common additions include:
- Open-plan kitchen and dining area on the ground floor
- Additional bedrooms upstairs
- Home office or study space
- Extra bathroom or en-suite
- Utility rooms or storage areas
This flexibility makes double storey extensions a popular choice for growing families.
Planning Permission Requirements
In many cases, a double storey extension will require planning permission, especially in a built-up area like Furzedown.
Key Factors Considered by the Council
- Height and scale of the extension
- Impact on neighbouring properties
- Distance from boundaries
- Design compatibility with surrounding homes
- Loss of light or privacy
Rear extensions typically have more flexibility, but side extensions are often subject to stricter rules.
Permitted Development Limits
Some extensions may fall under permitted development, but double storey extensions have tighter restrictions.
For example:
- They must not extend beyond certain depth limits
- The roof pitch must match the existing property
- Materials should be similar in appearance
If your project goes beyond these limits, a full planning application will be required.
Building Regulations and Safety
Even if planning permission is approved, your extension must meet building regulations.
These cover:
- Structural stability
- Fire safety measures
- Insulation and energy efficiency
- Ventilation
- Electrical and plumbing systems
Inspections will be carried out during construction to ensure compliance.
Design Considerations
A successful double storey extension is not just about adding space. It must also feel like a natural part of your home.
Matching the Existing Style
Using similar materials and design elements helps the extension blend in with the original structure.
Natural Light
Large windows, rooflights, and glass doors can improve brightness and make spaces feel larger.
Internal Flow
Layouts should connect smoothly between old and new spaces, avoiding awkward transitions.
Privacy
Upstairs windows should be positioned carefully to avoid overlooking neighbouring properties.
Costs to Consider
The cost of a double storey extension in Furzedown depends on several factors.
- Size and complexity of the build
- Quality of materials and finishes
- Structural changes required
- Professional fees for design and approvals
While costs are higher than single storey extensions, the added space and value often justify the investment.
Timeline for Completion
A typical double storey extension project follows several stages:
- Design and planning: 2 to 3 months
- Planning approval: Around 8 weeks
- Construction: 4 to 8 months
Delays can occur due to weather, supply issues, or changes during construction.
Party Wall Agreements
If your home shares a wall with a neighbour, you may need a party wall agreement before starting work.
This involves notifying neighbours and agreeing on how the work will be carried out to avoid disputes.
Common Challenges
Even well-planned projects can face obstacles.
Planning Restrictions
Strict local policies can limit the size or design of your extension.
Budget Overruns
Unexpected structural issues or material costs can increase expenses.
Disruption During Construction
Living in the property while work is ongoing can be challenging.
Neighbour Concerns
Objections from neighbours can delay approvals.
Being prepared for these issues helps keep your project on track.
Tips for a Successful Project
A smooth extension project starts with the right approach.
- Hire experienced architects and builders
- Get accurate drawings and approvals before starting
- Set a realistic budget with contingency funds
- Communicate clearly with contractors
- Stay involved throughout the process
Good planning reduces stress and improves results.
Ready to Extend Your Home?
A double storey extension can completely transform your living space, but success depends on careful planning and expert guidance. From design to approvals and construction, every stage plays a crucial role.
If you’re thinking about extending your home in Furzedown, now is the time to take the first step. With Studio20 Architects, you get expert support to design, plan, and deliver a space that works for your lifestyle while meeting all local requirements.
Get in touch with Studio20 Architects today and turn your vision into a well-designed, functional home.
FAQ
Do I need planning permission for a double storey extension?
In most cases, yes. Double storey extensions often exceed permitted development limits and require council approval.
How long does a double storey extension take to build?
Construction typically takes between 4 to 8 months, depending on the size and complexity of the project.
Will a double storey extension add value to my home?
Yes, it can significantly increase property value, especially if it adds bedrooms or improves layout.
Can I stay in my home during construction?
Yes, but it can be disruptive. Some homeowners choose to move out during major stages of the build.
What is the biggest challenge in these projects?
Planning approval and budget control are often the most challenging aspects.
