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We specialise in everything from interior design to garden landscaping, offering customised designs for homes and gardens alike.


Working with top-class architects and contractors, BGR offers construction services, including timber-frame design, home extensions, and garden transformations.

A Guide To Timber Frame Extensions

Timber frame extensions blend traditional craftsmanship and modern design, providing an eco-friendly solution for expanding residential or commercial spaces. Renowned for their durability and aesthetic appeal, these structures are crafted from heavy timber beams, forming a robust framework.

A Guide To Timber Frame Extensions

Posted on

November 22, 2023


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Discover the elegance of our bespoke timber frame designs. Contact us now to extend your vision with our expert craftsmanship and innovation.

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What sets them apart is their rapid construction and design flexibility, allowing for a harmonious integration with existing buildings or a distinctly modern touch. The use of timber, a renewable and sustainable resource, underscores the environmental benefits of these extensions.

Moreover, wood’s inherent insulation properties enhance the building’s energy efficiency, making timber frame extensions a practical and sustainable choice.

Why choose a timber frame extension?

Opting for a timber frame extension brings a host of advantages, ideal for those seeking an eco-friendly, efficient, and aesthetically pleasing expansion of their space. Here’s why it stands out:

Eco-friendly choice

Timber frame buildings excel in environmental sustainability. Using timber, a renewable and responsibly sourced material, significantly lowers the ecological footprint compared to conventional materials like steel or concrete. This approach also supports carbon sequestration, further enhancing its green credentials.

Quick assembly

One of the standout features of timber frame construction is its rapid assembly. Prefabrication of components off-site leads to a swift on-site erection, dramatically slashing construction time and labour costs.

Superior energy efficiency

The natural insulation properties of wood make timber frame structures inherently energy-efficient. They maintain comfortable temperatures year-round, reducing the need for extensive heating or cooling. This energy-saving aspect is further boosted by the ease of incorporating additional insulation during construction.

Visual appeal and warmth

Timber frames naturally exude a warm and inviting aesthetic, offering a range of styles from charmingly rustic to modern and sleek. This versatility allows for a unique architectural expression that can either complement the existing structure or make a bold, contemporary statement.

Flexible design options

The adaptability of timber frame construction suits a wide array of design preferences and applications. Whether it’s blending harmoniously with an existing building or creating a striking new addition, timber frames offer a range of design possibilities, accommodating diverse architectural tastes and needs.

Do I need planning permission for a timber frame extension?

Get your timber frame extension designed with us today.

Discover the elegance of our bespoke timber frame designs. Contact us now to extend your vision with our expert craftsmanship and innovation.

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Do I need planning permission for a timber frame extension?

When considering a timber frame extension, it’s important to understand the planning permissions involved. The necessity for such permission is influenced by various criteria, including the extension’s dimensions and your property’s location. Here’s a simplified guide:

  • Understanding Permitted Development Rights: Many small-scale extensions in the UK don’t require planning permission, falling under Permitted Development Rights. These rights have specific limitations on the extension’s size, height, and the proportion of land it covers.
  • Special area considerations: Properties in sensitive areas, like conservation areas, National Parks, Areas of Outstanding Natural Beauty, or World Heritage Sites, face stricter rules. Extensions in these areas are more likely to require planning permission.
  • Listed buildings and protected Lands: If your home is a listed building or is situated in a protected area, obtaining planning permission for any extension is generally mandatory.
  • Compliance with building regulations is essential: Irrespective of whether planning permission is required, your extension must comply with UK building regulations. These standards ensure the safety and energy efficiency of the construction.
  • Neighbour Consultation Scheme: For certain sizes of extensions under permitted development, you might need to inform your local planning authority, initiating the Neighbour Consultation Scheme. This process allows neighbours to comment on your proposed extension, potentially impacting its approval.

Cost and budgeting for your extension

Planning the budget for a timber frame extension involves understanding various cost factors and effective financial management. The overall expense can differ based on the project’s scope, design, material quality, and geographical location. Here’s a breakdown of what to expect and tips for budget management:

Cost range overview

The cost for timber frame extensions typically ranges from £1,500 to £2,500 per square metre. This estimate can fluctuate based on specific project details. For precise costs, obtaining multiple quotes from contractors is recommended.

Key cost determinants

  • Extension size: The larger the extension, the higher the cost.
  • Design intricacy: Custom or complex designs can escalate expenses.
  • Material quality: Opting for premium materials increases the budget.
  • Regional price variations: Costs can vary in different parts of the country.

Budgeting strategies

  • Obtain detailed quotations: Compare itemised costs from different builders.
  • Allocate a contingency budget: Set aside an extra 10-20% of your total budget for unexpected costs.
  • Essentials first: Focus spending on essential aspects before luxury additions.

Expense management tips

  • Staged building: If budget is a concern, consider completing the project in stages.
  • DIY contributions: Save money by handling some tasks like painting or minor installations yourself.
  • Monitor spending: Keep a close track of all expenditures to avoid going over budget.

Seek professional input

Engaging an architect or a quantity surveyor can give you a more accurate budget forecast.

Long-term financial benefits

Remember, the initial investment in a timber frame extension may lead to future savings in energy bills due to its efficient insulation properties.

Does a timber frame extension get built on-site?

Does a timber frame extension get built on-site?

The construction of timber frame extensions primarily involves assembling prefabricated components on-site. These frames are initially crafted in a factory setting, where accuracy and quality control are emphasised. After fabrication, the structure is transported to the construction site. Here, the pre-made parts are quickly put together, a process much faster than traditional building methods.

This approach significantly shortens the construction period and reduces the impact of potential weather delays. While complete on-site construction is an option, the blend of off-site prefabrication and on-site assembly is generally preferred for its efficiency and convenience.

Which exterior finishes work on a timber frame extension?

Several exterior finish options are suitable for timber frame extensions, each offering unique aesthetic and functional qualities. Your choice should factor in the desired style, maintenance level, and local climate conditions. Here’s a rundown of popular finishes:

Different types of cladding

  • Wooden cladding: Offers a classic look with various wood types to choose from, each requiring different care.
  • Composite cladding: Combines wood and plastic, providing a wood-like appearance but with reduced upkeep.
  • Metal cladding: Delivers a sleek, modern aesthetic and is known for its durability.
  • Brick or stone veneer: Ideal for a traditional vibe, especially to match existing masonry.


This plaster-like coating creates a smooth finish and is customisable in colour and texture, suited for a modern appearance.

Board and batten

A traditional approach using alternating wide and narrow wooden strips for a distinctive patterned facade.

Fibre cement siding

Mimics various materials like wood or stucco while offering durability and low maintenance.


Known for its seamless look and colour versatility, it’s great for achieving a Mediterranean feel.

Vinyl siding

An economical and easy-to-maintain option available in a range of colours and styles.

Sustainability and environmental impact

Sustainability and environmental impact

Timber is renowned for its eco-friendliness and sustainability in construction, offering a range of environmental advantages:


As a renewable resource, timber, especially when sourced from well-managed forests, has a significantly lower environmental footprint than materials like steel or concrete. These forests also support biodiversity and ecosystem health through sustainable forestry practices.

Carbon storage

During their growth, trees absorb carbon dioxide, a major greenhouse gas. This carbon remains stored in the timber used in buildings, effectively reducing overall carbon emissions.

Lower energy production costs

Compared to the production of steel or concrete, timber requires less energy, thereby emitting fewer greenhouse gases. This aspect makes timber a more sustainable choice right from the manufacturing stage.

Natural insulation

Timber’s inherent insulating properties mean buildings constructed with it are more energy-efficient. This leads to reduced heating and cooling costs, lowering the environmental impact over the building’s lifespan.

Durability and longevity

Properly maintained timber structures can last for many years, adding to their sustainability. Post-use timber can be recycled or repurposed, extending its life cycle and reducing waste.

Eco-friendly disposal

At the end of its life, timber is biodegradable, lessening its environmental impact. It can also be recycled, further minimising waste.

Contribution to green building standards

Timber frame construction aligns well with green building certifications like LEED or BREEAM, which evaluate buildings based on sustainability criteria.

Tips to help you extend with a timber frame

To successfully extend your home with a timber frame, consider these key tips:

  • Detailed planning: Ensure your design meets both your personal needs and adheres to local building codes. Engaging a professional like an architect or structural engineer can provide valuable insights.
  • Quality timber selection: Invest in superior quality, sustainably sourced timber. This not only ensures the durability of your extension but also supports environmental sustainability.
  • Experienced contractor: Employ a builder who specialises in timber frame construction. Verify their expertise by reviewing past projects and obtaining references.
  • Focus on insulation: Enhance the natural insulation qualities of timber by incorporating top-tier insulation materials, boosting the energy efficiency of your extension.
  • Maintenance considerations: Factor in the upkeep needs of your exterior materials to maintain the extension’s aesthetics and integrity over time.
  • Budget management: Allocate a contingency budget for unforeseen expenses and keep a close eye on spending throughout the project.
  • Adaptability: Stay adaptable to changes or challenges that may arise during the building process.

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