How to Approach a Single Storey Extension in Cardiff
October 2026 4 min read Cardiff & Caerphilly
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Transforming your home with a single storey extension is a practical way to increase your living space without the upheaval of moving. This is especially relevant for Cardiff homeowners looking to adapt their properties to meet changing needs. Whether it's a larger kitchen, an extra bedroom, or an open-plan living area, knowing the ins and outs of a single storey extension can help you make informed decisions.
What is a Single Storey Extension?
A single storey extension is an additional structure built onto the existing property that only has one level. It is a popular option for homeowners who want to add more space to their home without the need for extensive renovations or moving. This type of extension can vary in design, from a simple side extension to a more complex rear extension.
What Are the Costs of a Single Storey Extension in Cardiff?
The cost to build a single storey extension in Cardiff typically ranges from £1,200 to £2,500 per square metre, depending on several factors:
Design complexity: Unique and bespoke designs often cost more due to the increased time and materials required.
Materials used: Options include brick, render, and timber—each carries different price points.
Location and access: Difficulty accessing the site can add to costs, especially in densely populated areas.
It’s crucial to plan your budget thoroughly, taking into account hidden costs such as planning fees, building regulations, and design fees. A detailed breakdown should include:
Architectural design fees: Typical costs range from £500 to £3,000 depending on the project size.
Project management: This can be handled in-house or outsourced, impacting overall costs.
Finishing touches: Kitchens, bathrooms, or flooring can significantly affect your budget.
How Long Does It Take to Complete a Single Storey Extension?
The timeframe for completing a single storey extension can vary based on the project's scale:
Planning and design: This may take from a few weeks up to several months.
Construction: Typically, the construction phase takes around 8 to 12 weeks for a standard extension. However, more elaborate designs may require additional time.
Be aware of unexpected delays, which can happen due to weather conditions, supply chain issues, or even changes in your requirements during the process.
What Materials Should You Consider?
Choosing materials for your single storey extension is crucial and depends on factors like aesthetic preferences, insulation needs, and durability. Here’s a list of common materials you could consider:
Brick: A traditional choice that blends well with most Cardiff properties.
Render: Offers a modern finish, suitable for contemporary designs.
Timber: Great for eco-friendly builds but requires more maintenance over time.
How Do You Ensure Your Extension Meets Local Regulations?
A single storey extension in Cardiff must comply with the Building Regulations and may require planning permission, especially if:
It is significantly larger than the original footprint.
It affects the privacy of neighbouring properties.
There are restrictions on the type of property.
Before starting any extension project, it’s vital to check the regulations through Cardiff Council. This process can save you time and potential fines later on.
What Common Mistakes Should Be Avoided?
When planning your single storey extension, consider avoiding these common pitfalls:
Underestimating the budget: Ensure your budget includes all potential costs, not just construction.
Neglecting the design: Don't rush into decisions; proper design impacts functionality and aesthetic appeal.
Ignoring neighbours: Informing them and considering their concerns can prevent disputes.
What Should You Look for When Hiring a Construction Company?
Choosing the right builders in Cardiff is crucial for a successful project. Here are key tips:
Verify credentials: Ensure the company is insured and licensed for your project.
Review past work: Check their portfolio for similar projects to get a sense of their style and quality.
Seek recommendations: Ask for references and feedback from past clients to understand their reliability.
Frequently Asked Questions
How much does a single storey extension typically cost in Cardiff?
Costs can range from £1,200 to £2,500 per square metre, depending on materials and design complexity.
Do I need planning permission for a single storey extension?
It often depends on the size and design; it's best to check with Cardiff Council regarding your specific project.
How long does it take to build a single storey extension?
Construction generally takes 8 to 12 weeks but can vary by project size and complexity.
What materials are best for a single storey extension?
Common choices include brick, render, and timber, each varying in cost and maintenance needs.
What should I check before hiring builders in Cardiff?
Verify all credentials, check past work, and read client references before hiring.
Can I live in my house while the extension is being built?
Yes, but it may cause some disruption; clear plans can help mitigate this.
For a successful single storey extension project, proper planning and understanding of the local landscape are key. This approach not only optimises your living space but also adds value to your home.
