Two Storey Extension
double Storey Extension
Expanding your home with a two storey extension or also known as a double storey extension is as one of the most effective methods. By adding an extra two stories to a property, homeowners can add more rooms to their property’s floor plan or expand the size of existing rooms. As a larger-scale project, compared to single-storey extensions, this extension solution can drastically transform a home, creating a larger, more accommodating property.
Different Types of Two Storey Extensions
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Rear Two Storey Extensions
A rear extension is one of the most common types of two-storey additions, extending the home into the garden space at the back of the property. This type of extension is ideal for enlarging key living areas such as kitchens, dining rooms, or family rooms, creating a seamless connection between indoor and outdoor spaces. Many homeowners choose to incorporate large windows, sliding doors, or even a glazed section to bring in natural light and enhance the modern appeal of their home.
Side Two Storey Extensions
If your property has unused space along the side, a side extension is a great way to make better use of the available land. This option is particularly useful for narrow plots, where expanding to the rear may not be practical. Side extensions can provide additional rooms such as utility spaces, home offices, or guest bedrooms, making your home more functional while maintaining its overall footprint.
Wraparound Two Storey Extensions
A wraparound extension combines both rear and side extensions, offering maximum additional floor space for a complete transformation of your home. This type of extension is ideal for creating an open-plan ground floor layout while also expanding upstairs rooms, whether that means adding an extra bedroom, an en-suite bathroom, or even a home office. Wraparound extensions are a popular choice for growing families who need significantly more space but want to avoid moving house.
Contemporary & Glass Two-Storey Extensions
For a sleek, modern look, a contemporary or glass extension is an excellent option. These extensions often feature floor-to-ceiling windows, glass panels, and minimalist architecture to maximise natural light and create a stylish aesthetic. Beyond their visual appeal, contemporary extensions can also be energy-efficient, incorporating double-glazed glass and high-performance insulation to improve a home’s thermal efficiency. Whether used as a bright and airy living space or a modern kitchen-diner, a glazed two-storey extension can make a striking addition to any home.
Two Storey Extension Cost
A two-storey extension is a cost-effective way to add significant space and value to your home. While costs vary depending on size, materials and location, homeowners can typically expect to pay between £65,000 to £100,000, and in some cases £150,000 or more.
Factors Affecting the Cost
- Size & Complexity: Larger extensions or those requiring complex structural work (such as moving load-bearing walls) will increase costs.
- Materials: Choices such as brick, timber, or glass affect both the budget and final aesthetic. High-end materials, like bespoke glazing or premium brickwork, come at a higher price.
- Interior Finishes: Costs will also depend on flooring, insulation, lighting, and fittings. Luxury finishes and smart home integrations will raise the overall price.
- Additional Expenses: Don’t forget extra costs like architect fees, structural engineers, planning permissions, and landscaping, which can add thousands to the total.
Cost Advantages of a Two-Storey Extension
One key advantage of a two-storey extension is that the cost per square meter is often lower than a single-storey extension. Since the foundation and roof are shared across two floors, you gain double the space without doubling the cost, making it a cost-efficient way to expand your home.
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Double-Storey vs. Single-Storey Extensions
Single-Storey:
- More Affordable: Typically smaller in size and not as complex as larger extensions, this is often the most affordable option.
- Quicker Build Times: With a simpler design and smaller footprint, these extensions are typically faster to build.
- Ideal for Small Homes: A single-storey extension is more suitable for smaller households.
- Focused Expansion: If you’re focused on expanding one particular part of your home, this extension type will make the most sense.
- Planning Permission: Many single-storey extensions don’t require planning permission and can be built under permitted development rights.
Double-Storey:
- Double Space: Consisting of two floors, you can add double the space, adding both downstairs and upstairs rooms.
- More Value: As a more desirable home feature, double-storey extensions add more monetary value to a home than single-storey extensions.
- Cost Effective: With a typically lower cost per square metre and over two floors, it could be argued that these extensions provide better value for money.
HOW LONG DOES A TWO-STOREY EXTENSION TAKE TO BUILD?
Factors That Affect Timelines
- Planning Permission & Approvals: If planning permission is required, the process can take 8-12 weeks before construction even begins.
- Structural & Foundational Requirements: Two-storey extensions often require deeper foundations and additional structural reinforcements, which can extend the project timeline.
- Material Availability & Weather Conditions: Delays in sourcing materials or poor weather can slow down progress, especially for exterior work like roofing and bricklaying.
The Importance of Project Planning
A well-planned extension ensures minimal disruptions and a smoother construction process. Our team prioritises clear timelines, regular updates, and efficient project management to keep your extension on track and deliver the best results within a realistic timeframe.
Planning Permission for a Two Storey Extension
Extending your home with a two-storey addition requires careful consideration of planning regulations. While some extensions fall under permitted development rights, others will require planning permission based on their size, location, and impact on the surrounding area.
Do You Need Planning Permission?
A two-storey extension may require planning permission if:
- It exceeds permitted development limits, such as extending more than 3 metres from the rear of the original house.
- It is higher than the existing property’s eaves or exceeds the maximum height restrictions.
- Your home is in a conservation area, a designated greenbelt, or is a listed building.
- The extension is too close to a boundary or significantly impacts a neighbour’s privacy or access to light.
Key Factors to Consider When Choosing a Two Storey Extension
Even if your extension meets permitted development criteria, additional regulations may apply:
- Overlooking & Privacy: Windows or balconies overlooking a neighbouring property could lead to planning objections.
- Building Codes & Zoning Laws: Local authorities have specific rules regarding structural safety, energy efficiency, and drainage.
- Boundary Distances: Generally, two-storey extensions should be set at least 2 metres from the boundary to avoid planning complications. However, this may vary depending on local regulations and whether the extension affects neighbouring properties.
How Close Can You Build to a Boundary?
For single-storey extensions, you may be able to build up to the boundary under permitted development. However, two-storey extensions often require a greater setback to prevent overshadowing or disputes. In the UK, if your extension is within 2 metres of a boundary, the eaves height must not exceed 3 metres. Additionally, a Party Wall Agreement may be required if the extension affects a shared boundary with a neighbouring property.
Let Us Handle the Planning Process
Navigating planning permission can be complex, but our team is here to simplify the process. We handle all planning applications, liaise with local authorities, and ensure your extension complies with regulations. From initial design to securing approvals, we’ll guide you every step of the way to create a seamless and stress-free extension project.
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Faq
IS £50K ENOUGH FOR AN EXTENSION?
A budget of £50,000 may be enough for a small, simple extension, such as a modest single-storey extension, but a two-storey extension will typically cost more. The final cost depends on factors like size, materials, location, and whether structural changes are needed.
HOW CLOSE TO THE BOUNDARY CAN I BUILD A TWO-STOREY EXTENSION?
The distance you can build from the boundary depends on planning regulations and local authority guidelines. In most cases, a two-storey extension should be at least two metres from the boundary to comply with planning rules and avoid issues like overshadowing or privacy concerns.
DO I NEED AN ARCHITECT FOR AN EXTENSION?
While an architect is not legally required for every extension, their expertise can be invaluable in designing a space that is both functional and visually appealing. For complex extensions, such as two-storey builds or those requiring planning permission, an architect can help with design, structural considerations, and ensuring compliance with building regulations.
WILL A TWO-STOREY EXTENSION ADD VALUE TO MY PROPERTY?
A well-designed two-storey extension can significantly increase your property’s value by adding extra living space and improving its overall functionality. The added value depends on factors such as location, build quality, and how well the extension complements the existing property. Extensions that create additional bedrooms, open-plan kitchen spaces, or home offices tend to have the highest return on investment.
DO I NEED AN ARCHITECT FOR A TWO-STOREY EXTENSION?
For a two-storey extension, hiring an architect is highly recommended, as these projects are more structurally complex than single-storey builds. An architect can help create a design that meets both your needs and planning regulations while ensuring proper integration with your existing home.
HOW DEEP DO FOOTINGS NEED TO BE FOR A DOUBLE-STOREY EXTENSION?
The depth of footings for a two-storey extension depends on factors like soil type, ground conditions, and local building regulations. Generally, foundations should be at least 1 metre deep, but in areas with softer ground, they may need to be deeper.
