How Much Does a Double Storey Extension Cost?

Double Storey Extension Costs: Pricing, Planning & Essential Considerations

Find out how much a transformation costs and how it can boost your property's value. From design to construction, we break down the expenses and potential savings per square metre. Unveil the true cost of your dream home upgrade!

In this Price Guide, we will cover:

1. Why A Double Storey Extension?
2. Double Storey Extension Costs
3. Labour Costs
4. Material Costs
5. Hidden Costs
6. Save On Your Extension
7. Find Verified Extension Builders with MyBuilder
8. Common Questions

Why Consider A Double Storey Extension?

Double storey extensions are excellent for homeowners seeking to increase their living space without sacrificing garden areas. They provide additional rooms and the potential to enhance the property's market value.

Adding a double storey extension also means you can enjoy more room for diverse functionalities, such as extra bedrooms, a larger kitchen, or a home office. They are an effective way to enhance your living space, particularly in densely populated urban areas where space is limited.

Wishing for a bigger kitchen? See how much you should expect to budget with our kitchen extension cost price guide.

Save time, energy, and money on your extension by hiring a professional tradesperson, ensuring efficiency and quality workmanship! Post your job on MyBuilder to compare quotes from verified extension builders and find the right fit for your project today!

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How Much Does a Double Storey Extension Cost Per m²?

Understanding the cost per square metre is crucial when considering a double storey extension. This calculation forms the baseline budgeting tool, offering a clearer picture of financial planning required for such a substantial home improvement.

Here's the typical costs for different types of extensions per square metre:

Extension Type	Cost per m²
Standard Quality	£1,650 - £2,150
Good Quality	£1,830 - £2,350
Excellent Quality	£2,150 - £3,000

Don't forget: Costs encompass not just construction, but also detailed expenditures like foundations, architect fees, and labour.

Discover the different types of foundations used in building.

Side Extensions vs. Rear Extensions: Key Differences in Cost and Considerations

When deciding between a side or rear extension, it's important to understand how each option impacts cost, space and design.

Side extensions may cost more than rear extensions due to any additional structural work required, such as reinforcement. If the extension is near a shared boundary, planning permission could be required. Additionally, side extensions might reduce natural light in the home, so incorporating features like skylights or larger windows can help brighten the space.

Rear extensions are generally simpler and, in some cases, may cost slightly less than side extensions due to fewer structural challenges. They cause less disruption to neighbours but can reduce garden space; however, features like bifold doors or open-plan designs can effectively link indoor and outdoor areas.

Discover how much a house extension costs with our price guide.

Labour Costs: Hiring the Right Team For Your Double Storey Extension

Labour costs are a major part of your extension budget, varying based on location, project complexity and required tradespeople. For double-storey extensions, expect average labour costs between £1,200 and £1,800 per square metre, covering construction, electrical work and plumbing.

The daily rates for tradespeople depend on their experience and location. Here’s a breakdown of the typical costs:

• Builder: £150 – £250 per day.
• Electrician: £50 – £120 per hour.
• Plumber: £35 – £45 per hour.
• Plasterer: £30 – £50 per hour.
• Decorator: £20 – £50 per hour.
• Joiner: £35 – £45 per hour.
• Roofer: £30 – £40 per hour.

Don't commit to a double storey extension without first gathering detailed quotes from available professionals. Discover local extension builders near you on MyBuilder, and post your job today to find the right offer!

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Double Storey Extension Construction and Material Costs

When planning a double storey extension, the choice of materials plays a crucial role in determining the overall expenditure. Selecting the right materials not only impacts the initial budget but also affects long-term maintenance and energy efficiency. Quality materials can enhance the durability and aesthetics of your extension.

Don't forget: The cost of materials varies widely, making it essential to compare options.

Here are some common materials and their average costs:

• Brick: Durable, traditional choice with good insulation (£300 per 1,000 bricks).
• Concrete Blocks: Cost-effective option for structural walls (£1.50 per block).
• Roofing Tiles: Aesthetic choice that complements various designs (£0.90–£2.00 per tile).
• Timber: Versatile and sustainable building material (£25–£35 per square metre).

MyBuilder Tip: Always consult with a building professional to ensure the selected materials are appropriate for your home's design and location.

Hidden Costs of a Double Storey Extension: What To Consider

When budgeting for a double-storey extension, it’s important to watch out for hidden costs that can inflate your expenses. Planning ahead helps you stay on track. Here are some common unforeseen expenses that may arise, and how much you should expect to spend on them.

Common Hidden Costs & Price Estimates

• Planning Permissions: Needed for extensions exceeding permitted development rights, costing £200–£500.
• Building Regulation Fees: Inspections to meet safety standards, ranging from £500–£1,500.
• Party Wall Agreements: Required for shared walls or foundations, costing £700–£2,000.
• Utility Upgrades: For water, gas, electricity or drainage, costing £1,000–£5,000.
• Structural Changes: Reinforcing foundations or altering load-bearing walls can start from £2,000.
• Contingency Fund: Allocate 10-15% of your budget for unexpected expenses.

Don't forget: Adequate planning and consultation with professionals can help you avoid costly surprises.

Think you may need planning permission? Learn more with our planning permission costs guide.

Ways to Save on Your Extension: Cost-Effective Strategies

Saving on your double storey extension is possible with the right strategies. By making informed choices, you can achieve significant savings without compromising on quality.

Here are some effective methods to help you maximise your budget:

• Consider a simplistic design.
• Recycle and reuse existing materials where possible.
• Source materials locally.
• Plan your project during off-peak seasons when builders may offer lower rates.
• Manage parts of the project yourself if you have the skills and time, such as painting or landscaping.

Expand Your Living Space: Find Verified Extension Builders with MyBuilder

Unlock more space without the hassle! Explore the possibilities of a double storey extension with transparency and ease on MyBuilder. Don’t just dream - post your job now to find the right building professional!

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FAQs: Common Questions About Double Storey Extension Costs

How does the cost of a side double storey extension differ from other types?

A side double storey extension may differ in cost compared to rear or wrap-around extensions due to property layout, existing structural considerations, and potential planning restrictions. Side extensions often require more structural work to integrate with the existing building, which can increase costs.

What are the financial benefits of investing in a double storey extension?

Investing in a double storey extension offers several financial benefits, including an increase in property value, enhanced living space without the need to move, and the addition of versatile living areas.

What challenges might I face in managing the costs of a double storey extension?

Key challenges include budget overruns, material shortages, and logistical challenges.

How can I minimise expenses when planning to build a double storey extension?

Consider using a simpler design with less complex structural work, and choose cost-effective materials without compromising on durability.

What impact does the choice of materials have on the overall cost of a double storey extension?

The choice of materials has a significant impact on the total cost, as premium materials can increase the budget. However, investing in materials that require less upkeep can reduce long-term costs.