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Garden Room Extension: Costs, Ideas, and Planning Tips for Your Perfect Space


Red brick house with garden room extension

Credit: thedesignsheppard.com

Want to achieve a similar look with your garden room extension? Plan your project with Bea today.

Garden room extensions are rapidly gaining popularity among homeowners who want to add space and functionality to their properties without the complexity and cost of traditional home renovations. This guide is designed to provide comprehensive insights into garden room extensions, including the best ideas for your new space, how to plan effectively, and what costs to expect. We’ll also introduce HiiGuru, a platform that can streamline the process, making it easier and more affordable to bring your garden room extension dreams to life.


Table of Contents



What is a Garden Room Extension?


A garden room extension is a standalone or semi-detached structure built in your garden or backyard that serves as an additional room to your home. Unlike traditional extensions that integrate with the main house, a garden room is often positioned separately, which allows for more flexibility in design and usage. 


Benefits of a Garden Room Extension


  • Versatility: Garden rooms can be used for a variety of purposes, from home offices to guest bedrooms. This flexibility makes them a great investment for adapting to changing needs.

  • Enhanced Property Value: Adding a well-designed garden room can increase the overall value of your property, providing a return on investment should you decide to sell in the future.

  • Natural Light and Scenic Views: Garden rooms often feature large windows and glass doors, offering abundant natural light and unobstructed views of your garden.

  • Minimal Disruption: Because garden rooms are built separately from the main home, the construction process typically causes less disruption to your daily life compared to traditional home extensions.


House with modern garden room extension

Credit: greenretreats.co.uk

Inspired by this garden room project? Discuss your possibilities with Juan today.

5 Best Ideas for Your Garden Room Extension


When it comes to designing your garden room extension, the possibilities are endless. Here are five popular ideas to consider:


Home Office Haven


Transform your garden room into a serene and functional home office. With the rise of remote work, having a dedicated workspace away from the distractions of the main house can significantly boost productivity. 


Features to Include:


  • Ergonomic Furniture: Invest in a comfortable chair and desk to create an inviting work environment.

  • Ample Lighting: Incorporate a mix of natural light and artificial lighting to reduce eye strain and maintain a productive atmosphere.

  • Built-in Storage: Shelves and cabinets can help keep your workspace organised and clutter-free.

  • Soundproofing: Consider soundproofing the room to minimise external noise and distractions.


Cosy Reading Nook


For book lovers, a garden room can be the perfect reading sanctuary. Design it as a cosy nook where you can escape into your favourite novels.


Features to Include:


  • Comfortable Seating: Choose a plush armchair or a chaise lounge for ultimate relaxation.

  • Good Lighting: Use a combination of floor lamps, reading lights, and natural sunlight to create a well-lit space.

  • Bookshelves: Install built-in or freestanding bookshelves to display your collection.

  • Soft Textiles: Add throws and cushions to enhance comfort and create a warm atmosphere.


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Art Studio or Craft Room


A garden room extension can also serve as an inspiring space for creativity. Whether you’re into painting, crafting, or any other artistic endeavour, this room can be customised to suit your needs.


Features to Include:


  • Natural Light: Large windows or skylights can provide ample natural light, essential for detailed artistic work.

  • Storage Solutions: Include cabinets, drawers, and shelving to keep your art supplies organised and accessible.

  • Work Surfaces: Invest in sturdy work tables or easels that can handle your creative projects.

  • Inspirational Decor: Decorate the room with colours and artwork that inspire you.


Home Gym


Create a private fitness studio right in your garden. A garden room extension is an excellent way to establish a dedicated space for exercise, free from the distractions and limitations of your main home.


Features to Include:


  • Exercise Equipment: Equip the room with machines like treadmills, stationary bikes, or weights.

  • Mirrors: Install mirrors to help with form and technique during workouts.

  • Ventilation: Ensure proper ventilation or add a fan to keep the room cool and comfortable.

  • Flooring: Opt for durable and shock-absorbing flooring materials like rubber mats or cushioned vinyl.


Entertainment Hub


Turn your garden room into an entertainment haven where you can relax and enjoy leisure activities. This could be a space for movie nights, games, or social gatherings.


Features to Include:


  • Home Theater System: Invest in a high-quality projector or large-screen TV with a surround sound system.

  • Comfortable Seating: Add sectional sofas or recliners to accommodate guests.

  • Game Tables: Include options like a pool table, foosball, or a gaming console.

  • Bar Area: Set up a small bar with a countertop, stools, and a mini-fridge for refreshments.


Garden room extension with leather sofa

Credit: checkatrade.com

Need help with your garden room extension? Let Krystal help you create your dream space.

How to Plan a Garden Room Extension


Planning a garden room extension involves several key steps to ensure a successful project. Here’s a step-by-step guide to help you through the process:


Define Your Purpose


Start by determining the primary function of your garden room extension. This will influence the design, size, and features of the space. Consider the following questions:


  • What will the room be used for? Home office, guest room, art studio, etc.

  • How often will it be used? Daily, weekly, occasionally?

  • What specific features are necessary? Storage, lighting, flooring?


Set a Budget


A clear budget is crucial for managing your garden room extension project. Here’s what to consider:


  • Construction Costs: Includes materials, labour, and any permits.

  • Furnishing and Decor: Budget for furniture, decor, and finishing touches.

  • Contingency Funds: Set aside extra funds for unexpected expenses.


Tips for Budgeting:


  • Get Multiple Quotes: Obtain detailed quotes from various contractors to compare prices.

  • Prioritise Needs: Allocate more funds to essential features and areas.

  • Monitor Expenses: Track spending throughout the project to stay within budget.


Need the help of an architect for your garden room extension? Book one of our Architecture Gurus for a 30-minute video call. Transforming your home into a space you love shouldn't be a daunting task. With HiiGuru you can save time, avoid costly mistakes and bring your goals to life with experts by your side.

Choose a Design


The design of your garden room should complement both your home and garden. Consider the following:


  • Architectural Style: Match the design to the existing style of your home.

  • Materials: Choose durable and weather-resistant materials suitable for your garden’s climate.

  • Aesthetics: Select colours, finishes, and decor that enhance the overall look.


Design Tips:


  • Incorporate Natural Elements: Use large windows or bi-fold doors to blend the indoor space with the outdoor garden.

  • Consult Professionals: Engage with architects or designers to refine your design ideas.


Obtain Necessary Permits


Before starting construction, ensure you have the required permits. This may involve:


Planning Permission: Check with your local council if planning permission is needed for your garden room.

Building Regulations: Ensure the structure meets local building codes for safety and standards.


Steps to Secure Permits:


  • Contact Local Authorities: Visit or call your local planning department for guidelines.

  • Submit Plans: Provide detailed plans and specifications for approval.

  • Adhere to Regulations: Follow all regulations to avoid fines or delays.


Hire Professionals


Selecting the right professionals is essential for a smooth project. Here’s what to look for:


  • Architects: Choose an architect with experience in designing garden rooms.

  • Builders: Hire reputable builders with a track record of quality work.

  • Contractors: Ensure all contractors are licensed and insured.


Hiring Tips:


  • Check References: Ask for and review references from previous clients.

  • Review Portfolios: Examine their previous projects to gauge their expertise.

  • Discuss Timelines: Set clear timelines and milestones for project completion.


Garden room extension in wood

Credit: crownpavilions.com

Inspired by this garden room design? Let Esmerald help you achieve a similar look.

The Cost of a Garden Room Extension


The cost of a garden room extension can vary widely depending on several factors, including size, design, and materials. Here’s a breakdown of potential costs:


(These figures provide a rough estimate and actual costs may vary based on several factors, including location, design complexity, materials, additional features and contractor rates.)


Average Costs


  • Basic Garden Room: £15,000 to £25,000

  • Mid-Range Garden Room: £25,000 to £35,000

  • High-End Garden Room: £35,000 to £50,000 or more


Factors Influencing Cost


  • Size and Complexity: Larger and more complex designs will cost more.

  • Materials: High-quality or custom materials can increase the overall cost.

  • Additional Features: Extras like built-in furniture, high-end finishes, or advanced technology will add to the expense.


Cost-Saving Tips:


  • Choose Standard Designs: Opt for pre-designed plans to reduce customisation costs.

  • Compare Quotes: Get multiple quotes to find the best price.

  • DIY Elements: Consider handling some aspects of the project yourself, like painting or decorating.


How HiiGuru Can Simplify Your Garden Room Extension


HiiGuru is a revolutionary platform designed to make the process of creating your garden room extension more accessible and affordable. Here’s how HiiGuru can help:


Features of HiiGuru


  • Access to Architects: Connect with experienced architects who specialise in garden room extensions. They can provide expert design and planning services tailored to your needs.

  • No Contract Required: HiiGuru offers a flexible approach without the need for a traditional contract, making the process simpler and more straightforward.

  • Affordability: The platform provides cost-effective solutions, helping you stay within your budget while achieving high-quality results.


Benefits of Using HiiGuru


  • Expert Guidance: Receive professional advice and support throughout your project.

  • Streamlined Process: Enjoy an easy and efficient process from design to completion.

  • Cost-Effective Solutions: Find affordable options and avoid unnecessary expenses.


Brick house with garden room extension

Credit: oakwrights.co.uk

Want to include a garden room on your property? Discuss your project with Rick today.

Our Final Thoughts


A garden room extension is a versatile and valuable addition to any home, providing extra space and functionality tailored to your needs. By exploring various design ideas, planning carefully, and understanding the costs involved, you can create a space that enhances your living experience. Platforms like HiiGuru simplify the process, offering expert guidance and cost-effective solutions to bring your vision to life. Whether you’re considering a home office, a creative studio, or an entertainment hub, a well-planned garden room extension can significantly improve your home and add substantial value to your property.


Need the help of an architect for your garden room extension? Book one of our Architecture Gurus for a 30-minute video call. Transforming your home into a space you love shouldn't be a daunting task. With HiiGuru you can save time, avoid costly mistakes and bring your goals to life with experts by your side.

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