Introduction

When exploring a home extension in Bognor Regis you may need help deciding between a single-storey and double-storey extension. My extensive experience as a Bognor Regis home builder has enabled me to guide numerous homeowners through home expansion projects while understanding the essential considerations required to make these decisions.

This guide will analyze the financial implications and regulatory requirements for single-storey and double-storey extensions to help you make an informed decision for your home expansion.

What is a Single-Storey Home Extension?

A single-storey extension transforms your ground floor by adding space that typically expands into your garden or the property's side. Homeowners in Bognor Regis frequently select single-storey extensions to expand their kitchen space or create an open-plan living area and home office.

Common Uses for a Single-Storey Extension

✔ Open-plan kitchens – establish a modern and spacious environment for cooking and dining activities.

✔ Larger living rooms – create ideal environments for family gatherings and entertaining guests.

✔ Home offices – provide a separate area for conducting work activities at home.

✔ Extra bedroom & bathroom – offer perfect accommodation space for visitors or aging family members.

Benefits of a Single-Storey Extension

✅ Lower cost –  usually costs less than building a double-storey extension.

✅ Faster construction – results in quicker completion while minimizing disruption to your household compared to more extensive construction projects.

✅ Flexible design – Skylights alongside bi-fold doors and large windows produce a well-lit airy atmosphere for flexible design solutions.

✅ Easier planning permission – often qualify for permitted development status which simplifies planning permission though local regulations should always be verified.

Considerations for a Single-Storey Extension

🔹 Requires outdoor space – A garden area is needed to extend your home space.

🔹 Less space added – A double-storey extension allows for an increased amount of square footage.

🔹 May not increase property value as much – An upstairs bedroom addition typically generates higher property value compared to other types of extensions.

What is a Double-Storey Home Extension?

A double-storey home extension expands living space across two levels which makes it perfect for homeowners who want additional bedrooms, bathrooms, or living areas.

Common Uses for a Double-Storey Extension

✔ Extra bedrooms – Ideal for growing families.

✔ Additional bathrooms – A must for larger households.

✔ Bigger living and dining areas – Expanded living and dining spaces create additional room for both relaxation and social gatherings.

✔ Home office & storage space – The upper floor serves as a functional area for home office work and storage needs.

Benefits of a Double-Storey Extension

✅ Maximizes space – doubling your room area while maintaining the same building footprint.

✅ Better value for money – The initial cost is higher yet it delivers more value on a square meter basis.

✅ Increases property value – Your property's market value will rise when you add new bedrooms and bathrooms.

✅ Retains garden space – Your garden remains intact because adding height rather than spreading out maintains outdoor space.

Considerations for a Double-Storey Extension

🔹 Higher cost – Building a double-storey extension costs more because it requires extra materials and labor.

🔹 Longer build time – The greater complexity of building requires more time which extends the period of disruption.

🔹 Always requires planning permission – Planning permission from Arun District Council is mandatory for double-storey extensions as opposed to some single-storey extensions which may not require it.

🔹 Structural impact – Your home’s foundations need to be sufficiently strong to support the additional weight of a second storey.

Cost Comparison: Single-Storey vs. Double-Storey Extensions

The expense factor stands as one of the main considerations when homeowners in Bognor Regis evaluate their extension options. The pricing structure varies based on material choices and design but this is a general overview of costs:Extension Type

Average Cost (per sqm)

Estimated Total Cost (30 sqm)

Single-Storey

£1,800 - £3,000

£54,000 - £90,000

Double-Storey

£1,500 - £2,500

£90,000 - £120,000

💡 Key Takeaways:

While single-storey home extensions are less costly to build they provide less space for each pound spent compared to double-storey extensions.

Building a double-storey extension usually increases your property's value over time.

The total price of your project will vary based on material costs, labor expenses, design complexity, and necessary structural work.

Planning Permission and Building Regulations in Bognor Regis

Local regulations require examination when planning a home extension in Bognor Regis.

Do You Need Planning Permission?

Single-storey extensions can be built under permitted development rights when they comply with established size limits.

All double-storey extensions need Arun District Council's planning permission.

Factors That Affect Planning Approval:

✔ Size & height restrictions – Home extensions need to comply with established size and height limitations.

✔ Impact on neighbors – The extension must consider potential privacy intrusions and overlooking issues for neighboring properties.

✔ Conservation areas – Residents in Bognor Regis who live in conservation areas will encounter further restrictions.

To check the latest planning rules in Bognor Regis, visit Arun District Council’s Planning Portal.

Choosing the Right Home Extension for Your Needs

A Single-Storey Extension is Best if:

✔ You want a quicker, more affordable extension.

✔ You have enough garden space to extend.

✔ You prefer a bright, open-plan living area.

A Double-Storey Extension is Best if:

✔ You need multiple new rooms (e.g., bedrooms and bathrooms).

✔ You want to increase property value significantly.

✔ You have the budget and time for a larger project.

Final Thoughts: Which Home Extension is Right for You?

Both single-storey and double-storey extensions offer ways to transform your home and improve your living space.

As a trusted home builder in Bognor Regis, I’ve helped many homeowners create the perfect home extension to suit their needs. If you’re considering extending your home, I’d be happy to offer expert advice and a free consultation.

🚀 Contact us today to start planning your dream home extension in Bognor Regis! 🚀