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Things to Know About the Cost of Building a Garden House

Garden houses or rooms have surged in popularity over the past few years because of their cost-effectiveness in expanding usable living space within a pre-existing residential structure. When thoughtfully planned, they can be useful alternatives to conventional home extension ideas. Whether used as a home office, yoga studio, home gym, or simply a place for relaxation or entertainment, garden houses or rooms provide extra space to suit various needs, depending on the budget.

Things to Know About the Cost of Building a Garden House

Cost of garden houses
On average, the cost of a garden can start from anywhere around £8,000 and go up to approximately £150,000. This cost mainly depends on the size of the building and other specifications, such as materials used. For instance, glass garden houses in the country will cost more than those made of wood or other cheaper composite materials.

In general , a 3m x 3m size garden home typically comes with an average cost of about £21,000, while a slightly larger 5m x 3m room would have an average cost of approximately £27,000. These are the estimated prices for garden rooms and houses of standard sizes.

  • 2.5m x 1.8m – Between £9,249 and £20,400 with average price around £13,523
  • 2.5m x 2.5m – Between £7,995 and £22,665 with average price around £16,403
  • 3m x 2.5m – Between £8,995 and £31,154 with average price around £17,997
  • 3m x 3m – Between £8,995 and £33,833 with average price around £21,368
  • 4m x 3m – Between £13,020 and £38,800 with average price around £24,605
  • 5m x 3m – Between £15,016 and £55,000 with average price around £26,928
  • 6m x 3m – Between £17,013 and £45,090 with average price around £30,416
  • 5m x 4m – Between £18,344 and £52,776 with average price around £31,695
  • 6m x 4m – Between £21,007 and £63,000 with average price around £35,970

Key factors that impact the cost of garden houses
The pricing for designing, constructing, and installing outdoor spaces can be significant among companies and builders. Some companies offer standard pricing that covers essential elements like foundations, roofing, and flooring. On the other hand, some builders provide optional add-ons such as weathertight exterior shells, insulation, and electric connections as part of their packages. Additionally, there are companies that offer separate packages for specific elements like foundation, insulation, electrical work, and interior lining. These different components are typically factored into the cost of building garden homes.

  • VAT
    Most companies that build garden houses typically include the VAT in their quoted price. The prices may seem affordable when VAT is excluded from the total bill. So, it is always useful to ask the contractor whether this is added to the quoted price before hiring the company to construct the garden house.
  • Delivery
    When the garden house needs to be constructed within a specific radius of the company’s workshop, the delivery charges are typically included in the base price. But if the building site is located beyond this distance, extra delivery charges may be applied.
  • Installation
    The cost of installation is one of the basic elements that is included in most standard packages. That said, some companies offer pre-designed garden rooms where the installation is typically considered an additional cost.
  • Foundations
    Most of the time, garden room manufacturers add the cost of materials and installation required for the foundation to their standard prices. That said, some companies may have separate pricing for the foundation or require a homeowner to hire another company to install the foundation, which means additional costs.
  • Insulation
    This factor plays a crucial role in the construction of garden homes, as it ensures comfortable living conditions regardless of the outdoor temperature. Typically, garden rooms and homes are sold with solid insulation included in the base price. The insulation coverage extends to the floor, walls, and roof structure. Note that some companies may offer insulation as an optional add-on with separate pricing, allowing customers to customise their insulation based on specific needs and preferences.
  • Roof covering
    A garden room’s standard pricing also includes the cost of roof covering. Typically, companies offer standard finishes, such as insulated steel panels or asphalt finishes. Additionally, some companies may provide the option of upgrading to EPDM, which is known for its exceptional durability and longevity.
  • Flooring
    Many garden manufacturers typically incorporate the cost of skirting boards and laminate flooring into their standard pricing. Some companies may even offer a basic boarded finish with the opportunity to upgrade to different flooring options for an additional fee.
  • Doors and windows
    Usually, the base price of a garden house includes standard window and door configuration. These features are usually constructed with high-quality uPVC materials commonly used in standard house buildings. If one requests  any alterations or additions to these standard setups, the builder may apply an additional charge.
  • Lighting and power sockets
    In the past, the cost of installing power points and wiring for lighting was typically included in the pricing of garden rooms and houses. But recently, some companies have recently changed their approach by offering these electrical features as optional add-on packages, separate from the standard pricing.
  • External cladding
    The external cladding generally includes the company’s standard finish, which may consist of materials such as cedar or redwood. This is usually included in the base price of the building or structure.
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