Do I Need an Architect for Permitted Development?

If you’re considering making changes to your home under permitted development rights, you might be wondering whether you need an architect. The short answer is no, there is no legal requirement to hire an architect for a permitted development project. However, working with a design professional can help ensure that your project is well-planned, maximises your space effectively, and avoids costly mistakes.

Extension pictured above by Michael, architect in North London. See his profile on Design for Me and shortlist him for your project.

What is Permitted Development?

Permitted development (PD) allows homeowners to undertake certain types of home improvements without needing full planning permission. These include:

• Small rear and side extensions
• Loft conversions
• Garage conversions
• Garden rooms

Each of these projects must still comply with Building Regulations and other legal constraints, such as party wall agreements and covenants. Read more about permitted development rules here.

Why Consider Hiring an Architect for Permitted Development?

Even though permitted development removes the need for planning permission, there are several reasons why working with an architect can be beneficial:

1. Design Expertise

An architect can help you create a layout that maximises natural light, enhances flow, and ensures your new space integrates seamlessly with your existing home.

2. Ensuring Compliance

Even if your project qualifies as permitted development, it must still meet Building Regulations. Architects ensure designs meet safety, insulation, and structural integrity requirements.

3. Certificate of Lawful Development

If you want to be certain your project qualifies as permitted development, you can apply for a Certificate of Lawful Development from your local council. An architect can prepare the necessary drawings and documentation for this application.

4. Detailed Construction Drawings

Clear, precise plans help builders provide accurate quotes and avoid disputes during construction. Most builders prefer working from architect-prepared drawings to ensure the project runs smoothly.

Can I Go Straight to a Builder?

Yes, but it may not always be the best approach. Builders will need detailed drawings to price and execute the work correctly. If you don’t hire an architect, you may need an architectural technologist or experienced builder with design skills to prepare these plans. Some homeowners also opt for design and build companies, which handle both design and construction in-house.

Read more about working directly with a builder here.

Alternative Design Professionals

If you decide not to hire an architect, you could consider:

• Architectural Technologists – Experts in the technical aspects of building design and regulatory compliance.
• Interior Designers – If your project focuses on reconfiguring internal space rather than major structural changes.
• Builders with In-House Designers – Some building firms offer design services, though quality varies.

Do I Need a Structural Engineer?

If your project involves removing load-bearing walls, altering the roof structure, or underpinning foundations, you will need a structural engineer. They ensure your design is structurally sound and compliant with regulations.

Key Takeaways

• You do not legally need an architect for permitted development, but their expertise can help optimise your project.
• Building Regulations approval is still required for most permitted development projects.
• Hiring an architect or design professional can help create a well-thought-out design, prevent issues, and streamline the construction process.
• Other professionals, such as architectural technologists or builders with design capabilities, may be suitable alternatives.

Need Help Finding the Right Design Professional?

Emily  Design for Me