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Transforming Visions into Reality

Expand Your Home: Double Storey Side Extensions! 

Milton Keynes, Buckinghamshire, Hertfordshire, Bedfordshire, and Greater London

Modern home extension with large windows and a brick facade, set in a landscaped garden.

Expand Your Home: Double Storey Side Extensions! 🏡✨

Significantly increase your property's footprint and value with a double-storey side extension in the UK!

Why Build? The Benefits!

  • Maximise Space: Gain substantial additional rooms on both ground and first floors.
  • Less Impact on Garden: Often impacts garden space less than a rear extension, especially if you have a wide side plot.
  • Cost-Effective per m²: Similar to double-storey rear, it's more efficient per square metre than single-storey.
  • Accommodate Growing Families: Ideal for creating new bedrooms, bathrooms, and larger living areas.
  • Improved Layout Coherence: Can lead to a much more integrated and functional layout for your home.

What Can You Create? Ideas for Your New Space!

  • Larger Kitchen/Living/Dining Area: Expand your ground floor for open-plan living.
  • Additional Bedroom(s): Create new sleeping quarters or guest rooms upstairs.
  • En-suite Bathroom/Dressing Room: Add a private bathroom or walk-in wardrobe to an existing or new bedroom.
  • Dedicated Utility Room: A practical space for laundry and storage.
  • Home Office/Study: A quiet, separate area for work.
  • Playroom for Children/Teenagers: A dedicated zone for leisure and activities.

Key Facts & Figures (UK Averages)

💰 Estimated Cost

  • £1,400 - £2,400 per m² (excluding VAT, similar to double-storey rear extensions).
  • For a semi-detached or detached home: Expect £90,000 to £150,000+ (shell cost only).
  • Remember to budget for professional fees (architect, structural engineer) and a 10-20% contingency!

📈 Value Added

  • Can significantly increase property value, often by 10% - 20%, especially when adding bedrooms and bathrooms.
  • Highly desirable for accommodating family growth.

📏 Average Added Space

  • Adds new floor space across two levels.
  • Width typically limited to half the width of the original house under Permitted Development (if applicable).
  • Maximum height generally no higher than the existing house.

🗓️ Planning Permission

  • Often Required: Due to their size and impact, double-storey side extensions frequently require full planning permission.
  • Full Planning Application: Typically takes 8-10 weeks for a decision.
  • Overall Project Timeline (Design to Completion): Can range from 9-15 months or more, depending on complexity and approvals.

Ready to create significant new space for your growing family? Consult with local architects and builders to bring your vision to life!

Visualise Your Dream Annex!

Red brick house with a grey roof, white windows, and small front garden.

External View

Modern interior of a multi-level home featuring a living area and workspace.

Internal View

UK Double Storey Side Extension Guide!

Get a free quote

Planning application
Structural drawings and calculations
Building Regulation Drawings
Investment and Development
Luxury Interior Design
Free 3D Feasibility Study
Other services
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WhatsApp: +44 74040 86195

E-mail: contact@al-haitham.co.uk

Address: Office F7, Gloucester House, 399 Silbury Blvd, Milton Keynes MK9 2AH 

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