House Extension Plans – Free Quote & Online Consultations
Thinking about extending your home? Whether you’re adding space for a growing family, creating a dream kitchen, or building a home office, house extension plans are key to getting the most out of your project. But where do you start? In this guide, we’ll walk you through the entire process, so you can approach your home extension with confidence.
In This Article
1. What are House Extension Plans?
2. Why You Need House Extension Plans
3. Key Steps in Creating House Extension Plans
4. Do You Need Planning Permission?
5. Budgeting for Your Extension
6. Choosing the Right Architectural Designer
7. Ready to Get Started?
What Are House Extension Plans?
Simply put, house extension plans are detailed drawings and documents that outline your home extension. These plans include the design, layout, and construction details that will guide the builders through the project. They are essential not just for construction but also for securing planning permission and ensuring your project complies with building regulations.
House Extension Plans Example – In & Out House
Why You Need House Extension Plans
Proper house extension plans are more than just a formality—they’re the blueprint for your entire project. Here’s why you need them:
- Accurate Design: They ensure that every detail, from room dimensions to window placement, is planned out before construction begins.
- Planning Permission: Most extensions need approval from your local council. House extension plans are a requirement for this.
- Smooth Building Process: Clear plans prevent confusion during construction, ensuring that builders know exactly what to do.
- Avoid Costly Mistakes: With everything laid out beforehand, you reduce the risk of delays, miscommunications, or expensive errors.
Key Steps in Creating House Extension Plans
Creating house extension plans involves several key steps. Here’s what to expect:
- Initial Consultation: Your architect or designer will visit your home to understand your needs and assess the space. They’ll discuss your ideas and provide advice on what’s feasible.
- Concept Design: After the consultation, the designer will create initial sketches or concepts, giving you a visual idea of what the extension could look like.
- Detailed Drawings: Once the concept is agreed upon, detailed architectural plans are drawn. These include exact measurements, materials, and construction details.
- Planning Permission: If your extension requires planning permission, the detailed plans will be submitted to the council for approval. This can be done via the planning portal, though we’d recommend appointing the services of a practice like is who are familiar with the process.
- Building Regulations Drawings: Separate from planning permission, these ensure your extension meets building safety standards. These more technical plans are essential for getting the green light for construction, and following completion the final building certificate.
House Extension Plans Example – Dash House
Do You Need Planning Permission?
Planning permission depends on the size and scope of your extension. If you’re building a small, single storey extension that meets certain guidelines, it may fall under Permitted Development Rights. This means you won’t need full planning permission. However, for larger projects, or if you live in a conservation area, you’ll likely need approval from your local council.
When planning permission is required:
- The extension significantly alters the exterior.
- It exceeds the limits of Permitted Development (such as extending more than 6 metres from the original house).
- Your home is in a protected area, like a conservation zone.
Even if you don’t need planning permission, it’s advisable to apply for a Lawful Development Certificate. This gives legal confirmation that your extension complies with regulations and can be useful if you sell your property later.
Home Extension Section Example – Monument House
Budgeting for Your New Extension
Budgeting is a critical part of your home extension project. Costs vary depending on factors like size, materials, and the complexity of the build. On average, a standard house extension can cost between £2,500 to £3,500 per square metre.
When planning your budget, consider:
- Architectural Fees: Typically, architects charge a percentage of the project cost or a flat fee for creating house extension plans.
- Planning Fees: If your project requires planning permission, there will be submission fees.
- Unexpected Costs: It’s wise to set aside 10-15% of your budget for unexpected costs or changes during the build.
For more details on house extension costs, read our full blog HERE!
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Traditional Wraparound Extension – Walnut House
Choosing the Right Architectural Designer
A well-designed extension starts with the right architectural designer. When selecting a designer, consider the following:
- Local Knowledge: It’s beneficial to work with designers who are familiar with your area’s planning regulations. At DeVis Architecture, we have extensive experience working in Surrey and Greater London.
- Portfolio: Review past projects to ensure the designer can deliver the style and quality you’re looking for.
- Clear Communication: The right team will keep you informed throughout the process, ensuring everything is on track.
At DeVis Architecture, we specialise in crafting bespoke house extension plans that meet our clients’ needs and make the planning process as smooth as possible.
Meet the DeVis Architecture Team – Zak Gilby & Lina Luzina
Ready to Get Started?
House extension plans are the foundation of a successful home extension. Whether you’re at the early stages of planning or ready to get started, the right guidance can make all the difference. At DeVis Architecture, we’re here to help you every step of the way—from the initial consultation to the final build.
Ready to turn your dream extension into a reality? Contact us today for a free consultation and let’s get started on your house extension plans!
