Are you dreaming of adding extra space to your home? A single-storey extension can be the perfect solution. Whether you're expanding your kitchen, adding a home office, or creating a larger living area, extending your home is a major decision that can enhance both your living experience and your property value.
However, before you dive in, it's essential to understand the key aspects of building a single-storey extension. In this blog, we'll guide you through everything you need to know to ensure a smooth, stress-free project.
1. Planning Permission and Regulations
One of the first steps in any extension project is determining whether you need planning permission. In the UK, many single-storey extensions fall under permitted development rights, which means you won't need formal permission if your project meets specific criteria:
The extension must not exceed 50% of the land surrounding your home.
The maximum height must be four metres for a single-storey extension.
The extension should not extend beyond the rear wall of the original house by more than six metres for a semi-detached house, or eight metres for a detached house.
You must use materials that match the existing property.
However, rules vary depending on the area, such as if your home is in a conservation zone or listed. It’s always best to check with your local authority or hire a professional to handle the legal side.
2. Budgeting for Your Extension
Budget is a critical factor when planning your extension. Costs can vary significantly depending on the size, design, materials, and location of the extension. Generally, the cost of a single-storey extension ranges between £1,200 and £2,500 per square metre.
Here’s a basic breakdown of costs to consider:
Design and planning: Hiring an architect or designer to draw up plans.
Materials: High-quality materials like bricks, roofing, and windows can increase costs.
Labour: The cost of builders, plumbers, and electricians.
Finishes: Flooring, tiles, paint, and fixtures add up.
Unexpected expenses: Always allow 10-15% extra for unforeseen issues.
Be realistic with your budget and plan carefully to avoid costly surprises during the build.
3. Choosing the Right Builder
Your builder will play a crucial role in the success of your extension project. Look for a contractor who has experience with extensions, particularly with projects similar to yours. Here are some tips for finding the right builder:
Check qualifications: Ensure the builder is licensed and accredited.
Look at past work: Ask for references and visit past projects if possible.
Get multiple quotes: Compare at least three quotes to ensure you’re getting a fair price.
Ask about insurance: Make sure your builder has the right insurance in case of damage or accidents.
Don’t rush this step—taking the time to find the right builder will pay off in the long run.
4. Design and Layout
The design of your extension should complement your home’s existing layout. Work with a professional architect or designer to create a plan that not only adds space but also improves functionality. Here are some things to consider when designing your extension:
Natural light: Incorporate large windows, bi-fold doors, or skylights to maximize natural light.
Future-proofing: Think about your long-term needs. Will you need extra space in the future?
Building materials: Choose materials that match or complement the existing structure to maintain the aesthetic appeal.
5. Building Control and Inspections
Even if your project doesn’t require planning permission, it will need to meet building regulations. These rules ensure that your extension is safe, energy-efficient, and built to a high standard. Key areas covered include:
Structural integrity: Foundations, walls, and roof must meet certain safety standards.
Energy efficiency: Insulation, heating, and ventilation must comply with modern energy standards.
Fire safety: Fire-resistant materials and smoke alarms may be required.
A building control officer will inspect the work at various stages to ensure compliance, so it's essential to hire professionals who understand these requirements.
6. Timeline and Disruption
A single-storey extension typically takes three to six months from start to finish, depending on the complexity of the project. However, there may be some disruptions during the construction phase, especially if you're staying in the house while the work is being carried out.
Consider these factors to minimize disruption:
Temporary accommodations: You may want to move out during key phases, such as when the walls are being knocked through.
Access to utilities: Plan for any disruption to water, gas, or electricity.
Neighbours: Notify your neighbours about the building work, especially if the construction will affect their property.
7. Increase in Property Value
An extension can significantly boost your property’s value, but how much will depend on the quality of the build and the local market. On average, a well-executed extension can add 5-15% to the value of your home. For the best return on investment, focus on high-demand areas such as open-plan living spaces or a modern kitchen extension.
Final Thoughts
Building a single-storey extension can transform your home, giving you more space and increasing your property’s value. However, it's essential to plan carefully and consider all the legal, financial, and practical aspects before starting. From obtaining planning permission to hiring the right builder, taking the time to get everything in order will ensure a successful and stress-free project.
Looking for a reliable contractor to bring your extension vision to life? Contact HM Building Projects today for expert advice and high-quality craftsmanship.
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