1. Select Size

Size measured in feet

2. Select Treatment

Spray Treated

Treated with a beautiful golden brown spray treatment which colours and protects during transit. Designed to last through shipping and assembly, we do recommend treating the wood after installation to protect it.

Pressure Treated

For increased longevity you can opt for pressure treatment. In a pressurised tank chemical preservatives are forced deep into the wood’s fibres to resist rot or decay. Upgrading to Pressure Treated means you also get an extended 15 year guarantee.

2. Personalise your summerhouse

11mm Tongue and Groove

Our Standard flooring option which provides a durable, solid foundation and underfoot to the building. The 11mm option is ideal for less demanding and frequent usage, suitable for lighter intensity purposes like summer houses and other living spaces containing light furniture. The 11mm tongue and groove timber makes this a solid yet suitable, economical option.

19mm Tongue and Groove

1.7 times thicker than our standard 11mm flooring, our premium floor is the perfect choice for higher intensity usage. The construction uses thick 19mm Tongue and Groove timber, which gives you not only the strength, but better insulation against the cold weather. This specific floor is the perfect option if you’re planning on using the building as an everyday use office, gym or games room with heavy objects.

Mineral felt

Quick and easy to apply, Mineral felt is durable and protects the building against the elements. The mineral felt is also more durable than traditional sand felt, meaning that it does not need to be regularly replaced, making it a long term, cost effective option.

3. Add optional extras

Discover our range of BillyOh accessories that allow you to customise your very own garden building to very last detail.

Dimensions

  • Strong Tongue and Groove construction
  • Modern reverse apex design with increased headroom
  • Long, styrene glazed windows for natural light
  • Wide opening double door for easy access
  • Variable door positioning to suit your needs
  • Side windows for 360 views
  • Tall reverse apex design for increase head height
  • Base Coat Treated for Transit
Overall Dimensions (Includes Roof Overhang)
image
  • (A) Width: 3.00m (9ft10)
  • (B) Depth: 2.60m (8ft6)
  • (C) Ridge: 2.34m (7ft8)
  • (D) Eaves: 1.73m (5ft8)

Why buy the Petra Summerhouse?

BillyOh<br/>Guarantee
BillyOh
Guarantee

Protects the wood on your building against rot and decay.

UK<br/>Manufactured
UK
Manufactured

Over 20 years of experience in design and production.

Complete<br/>Building
Complete
Building

Floor, Tongue and Groove roof and roof felt as standard.

Extra<br/>Head-Height
Extra
Head-Height

Crouch free design, giving you the ultimate space.

What is it made from?

European Sourced Timber

Our carefully sourced timber is purposely selected to ensure dependable quality, creating a robust and reliable building.

Galvanised Ironmongery

Heavy duty hinges and latches included, galvanised for maximum weather protection.

Durable Tongue & Groove

The Tongue and Groove boards interlock with one another to form a tight seal offering high quality weather protection.

What is it made from?
Green Mineral Felt

Quick and easy to apply, our premium mineral felt is durable and protects your building against harsh weather.

Shatterproof Glazing

Tall and Durable Single SAN glazing included as standard on all doors and windows.

Adaptable Configuration

Configure how you like, with our adaptable door placement design.

And much more...

  • Modern reverse apex design
  • Tall glazed windows
  • Floor and roof included
  • Wide opening double doors
  • Tongue and Groove panels
  • Green mineral roof felt
  • Easy to build
  • Shatter resistant glazing
  • Optional pressure treatment
  • Protected during delivery
  • Fixtures and fitting included
  • Full assembly instructions

BillyOh Petra Summerhouses

The Petra is a bright building with windows across the front and double side windows. The tall windows and doors are glazed with shatter-resistant SAN giving you fantastic views and natural light without the worry of glass.


This wooden summer house lends itself to customisation, and with the range of sizes, you can choose the best one to suit your garden. With only one side having windows, it couldn’t be easier to place your Petra to the side of a garden or patio, making it a fantastic corner summerhouse. Due to the natural light and views given by the windowed front wall, the Petra has many uses and would work great as a home office, summerhouse bar, garden studio or decorate it with all your home accessories to create a relaxing home away from home.


The Petra comes with a beautiful golden spray treatment which can be upgraded to pressure treated for longevity. Your Petra can also be painted as many of our customers have done to match your chosen aesthetic. Please see our customer images for inspiration on what you could do with your garden summer house.


Sizes


This BillyOh building comes in a selection of sizes from 10x8 to 20x10. Our wide range of base sizes for the Petra reverse apex summerhouse is designed to be suitable for all types of gardens and budgets.


Design


The reverse apex design offers increased head height and lends itself to an everyday use office or relaxation room. Apex and reverse apex roof styles are typical in more traditional summerhouses and offer excellent water runoff.


We believe the Petra offers the perfect space for use as a home office or a cosy space to relax at the end of the day. Whatever you use it for, make the most of your outdoor space with a BillyOh Petra summerhouse.


Double Doors


Perfect for opening up during summer parties or on hot days, this traditional take on a contemporary summer house offers wide-opening double doors. There are a whole host of other customisable options including treatment and roofing upgrades.


Treatment


Our garden buildings feature options for trim colours for personal preference - for an alpine shade, opt for a light green, perhaps. We also offer pressure treatment as an optional wood treatment on the Petra summerhouse. This will increase its longevity and your BillyOh guarantee to 15 years against rot, decay, and insect infestation. Green mineral roof felt is included as standard.


Tongue and Groove Cladding


We use high-quality European-sourced summerhouse timber constructed in tongue and groove panels for this model. The Petra is designed for summer but also to stand up to even harsh weather conditions, where tongue and groove timber offers dependable quality and a tight seal.


Tongue and groove construction also gives you the option, for example of varying floor cladding thickness. You can customise your Petra and create an even more weather resistant garden building with sturdy construction, courtesy of our tongue and groove panelling.


Guarantee


On non-pressure treated models, we offer our BillyOh 10-year guarantee against rot and insect infestation. Summer house moisture and ability of moisture to rising in the form of damp make pressure-treating even our high-quality European sourced timber a worthwhile investment.


Planning Permission


Always make sure to double-check your local council rules, but generally planning regulations will allow you to build your Petra summerhouse without permission, if:


  • It is not intended for use as permanent living quarters
  • The eaves height after under 2.5m (the Petra's are 1.73m)
  • The ridge height is under 4m (the Petra's is 2.34m)
  • It is not two-storey
  • It isn't larger than 50% of the area of your garden
  • It isn't built past the front wall of your house

With some basic tools and the assembly instructions provided with your order, you and a friend can have your Petra built in no time. We always suggest mounting your garden building on a sturdy and level footing, like a concrete base.


Customers


And if you want to see how other Garden Buildings Direct customers got on with their Petra summerhouse, check out our customer stories for summer house ideas.


Delivery


Get your Petra wooden summer house with our fast and free delivery service to most of mainland UK in just 1 - 4 weeks. And if you have any more questions, check out our FAQs or get in touch with our friendly team today.

See how others have used the Petra Tongue and Groove Reverse Apex :

Dimensions 10 x 8 12 x 8 10 x 8 Pressure Treated 12 x 10 16 x 8 12 x 8 Pressure Treated 12 x 10 Pressure Treated 16 x 8 Pressure Treated 16 x 10 16 x 10 Pressure Treated 20 x 10 20 x 10 Pressure Treated
Width 299.6cm 358.2cm 299.6cm 358.2cm 475.4cm 358.2cm 358.2cm 475.4cm 475.4cm 475.4cm 592.6cm 592.6cm
Depth 259.8cm 259.8cm 259.8cm 318.3cm 259.8cm 259.8cm 318.3cm 259.8cm 318.3cm 318.3cm 318.3cm 318.3cm
Width (Internal) 287.4cm 346cm 287.4cm 346cm 463.2cm 346cm 346cm 463.2cm 463.2cm 463.2cm 580.4cm 580.4cm
Depth (Internal) 234.4cm 234.4cm 234.4cm 293cm 234.4cm 234.4cm 293cm 234.4cm 293cm 293cm 293cm 293cm
Ridge Height (Inc Floor) 234cm 234cm 234cm 247cm 234cm 234cm 247cm 234cm 247cm 247cm 247cm 247cm
Eaves Height (Inc Floor) 173.2cm 173.2cm 173.2cm 173.2cm 173.2cm 173.2cm 173.2cm 173.2cm 173.2cm 173.2cm 173.2cm 173.2cm
Ridge Height (Internal) 229.3cm 229.3cm 229.3cm 242.4cm 229.3cm 229.3cm 242.4cm 229.3cm 242.4cm 242.4cm 242.4cm 242.4cm
Eaves Height (Internal) 175.4cm 175.4cm 175.4cm 175.4cm 175.4cm 175.4cm 175.4cm 175.4cm 175.4cm 175.4cm 175.4cm 175.4cm
Door Opening Size (w x h) 114.8cm x 163.9cm 114.8cm x 163.9cm 114.8cm x 163.9cm 114.8cm x 163.9cm 114.8cm x 163.9cm 114.8cm x 163.9cm 114.8cm x 163.9cm 114.8cm x 163.9cm 114.8cm x 163.9cm 114.8cm x 163.9cm 114.8cm x 163.9cm 114.8cm x 163.9cm
Door Width 58.3cm 58.3cm 58.3cm 58.3cm 58.3cm 58.3cm 58.3cm 58.3cm 58.3cm 58.3cm 58.3cm 58.3cm
Door Height 164.5cm 164.5cm 164.5cm 164.5cm 164.5cm 164.5cm 164.5cm 164.5cm 164.5cm 164.5cm 164.5cm 164.5cm
Minimum Base Width 300cm 358cm 300cm 358cm 476cm 358cm 358cm 476cm 476cm 476cm 593cm 593cm
Minimum Base Length 260cm 260cm 260cm 319cm 260cm 260cm 319cm 260cm 319cm 319cm 319cm 319cm
Glazing Thickness 0.18cm 0.18cm 0.18cm 0.18cm 0.18cm 0.18cm 0.18cm 0.18cm 0.18cm 0.18cm 0.18cm 0.18cm
Materials 10 x 8 12 x 8 10 x 8 Pressure Treated 12 x 10 16 x 8 12 x 8 Pressure Treated 12 x 10 Pressure Treated 16 x 8 Pressure Treated 16 x 10 16 x 10 Pressure Treated 20 x 10 20 x 10 Pressure Treated
Glazing Material Styrene Styrene Styrene Styrene Styrene Styrene Styrene Styrene Styrene Styrene Styrene Styrene
Floor Material 11mm Tongue and Groove 11mm Tongue and Groove 11mm Pressure Treated Tongue and Groove 11mm Tongue and Groove 11mm Tongue and Groove 11mm Pressure Treated Tongue and Groove 11mm Pressure Treated Tongue and Groove 11mm Pressure Treated Tongue and Groove 11mm Tongue and Groove 11mm Pressure Treated Tongue and Groove 11mm Tongue and Groove 11mm Pressure Treated Tongue and Groove
Roof Material 11mm Tongue and Groove 11mm Tongue and Groove 11mm Pressure Treated Tongue and Groove 11mm Tongue and Groove 11mm Tongue and Groove 11mm Pressure Treated Tongue and Groove 11mm Pressure Treated Tongue and Groove 11mm Pressure Treated Tongue and Groove 11mm Tongue and Groove 11mm Pressure Treated Tongue and Groove 11mm Tongue and Groove 11mm Pressure Treated Tongue and Groove
Roof Covering Material Green Mineral Felt Green Mineral Felt Green Mineral Felt Green Mineral Felt Green Mineral Felt Green Mineral Felt Green Mineral Felt Green Mineral Felt Green Mineral Felt Green Mineral Felt Green Mineral Felt Green Mineral Felt
Features 10 x 8 12 x 8 10 x 8 Pressure Treated 12 x 10 16 x 8 12 x 8 Pressure Treated 12 x 10 Pressure Treated 16 x 8 Pressure Treated 16 x 10 16 x 10 Pressure Treated 20 x 10 20 x 10 Pressure Treated
Windows 6 Windows All Fixed 6 Windows All Fixed 6 Windows All Fixed 6 Windows All Fixed 8 Windows All Fixed 6 Windows All Fixed 6 Windows All Fixed 8 Windows All Fixed 8 Windows All Fixed 8 Windows All Fixed 10 Windows All Fixed 10 Windows All Fixed
Factory Basecoat Treatment Red Cedar Water Based Treatment for Transit Red Cedar Water Based Treatment for Transit Pressure Treated Red Cedar Water Based Treatment for Transit Red Cedar Water Based Treatment for Transit Pressure Treated Pressure Treated Pressure Treated Red Cedar Water Based Treatment for Transit Pressure Treated Red Cedar Water Based Treatment for Transit Pressure Treated
Shed Type large sheds workshops, Large Shed large sheds workshops, Large Shed large sheds workshops, Large Shed large sheds workshops, Large Shed large sheds workshops, Large Shed large sheds workshops, Large Shed large sheds workshops, Large Shed large sheds workshops, Large Shed large sheds workshops, Large Shed large sheds workshops, Large Shed large sheds workshops, Large Shed large sheds workshops, Large Shed
Roof Style Reverse Apex Reverse Apex Reverse Apex Reverse Apex Reverse Apex Reverse Apex Reverse Apex Reverse Apex Reverse Apex Reverse Apex Reverse Apex Reverse Apex
Cladding Style Tongue and Groove Tongue and Groove Tongue and Groove Tongue and Groove Tongue and Groove Tongue and Groove Tongue and Groove Tongue and Groove Tongue and Groove Tongue and Groove Tongue and Groove Tongue and Groove
Please Note: This product has been designed as an affordable solution to most popular light domestic uses. All products supplied self assembly flat packed unless otherwise stated.

Below you'll find answers to the questions we get asked the most about our products.

EXPAND ALL COLLAPSE ALL

The BillyOh guarantee covers this building against:

  • rot
  • decay
  • insect infestation

Please note: The guarantee does not cover timber splits or warping which may occur naturally over time.

Duration of Guarantee:

  • Tongue and Groove Buildings - up to 10 years
  • Log Cabins - up to 10 years
  • Pressure Treatment Buildings - up to 15 years

For more information about BillyOh Guarantee, please visit our terms and conditions

  • 11mm Tongue & Groove Wall panels

  • 11mm Tongue & Groove Floor

  • 11mm Tongue & Groove Roof

  • Green mineral roof felt

  • All fixtures and fittings

  • Comprehensive assembly instructions

Spray Treated: Our sheds and summerhouses get a beautiful golden brown spray treatment before leaving the factory in order to preserve the quality of the wood up until the delivery. As this only lasts through the transit stage, we do advise treating the wood after installation to protect and preserve it, as well as annual maintenance.

Pressure Treated: For an extra level of protection, you can opt for a pressure treated building which is an effective way of keeping the wood long lasting. This is an extra step in the manufacturing process where the wood is treated in a pressurised tank. Chemical preservatives are forced deep into the wood’s fibres to resist rot, decay and termites. When you upgrade to Pressure Treatment, the guarantee is extended from 10 to 15 years.

With the Petra an 11mm tongue and groove floor and roof is included but you can upgrade to 19mm to suit more intensive use.

Roof:

11mm: Our standard roof option, this interlocking roof provides a reliable covering for any building. The Tongue and Groove not only gives your building a stronger roof but also a premium look and feel.

Floor:

11mm: Our Standard flooring option which provides a durable, solid foundation and underfoot to the building. The 11mm option is ideal for less demanding and frequent usage, suitable for lighter intensity purposes like summer houses and other living spaces containing light furniture. The 11mm tongue and groove timber makes this a solid yet suitable, economical option.

19mm: A premium floor is the perfect choice for higher intensity usage. The construction uses thick 19mm tongue and groove timber, which gives you not only the strength, but better insulation against the cold weather. This specific floor is the perfect option if you’re planning on using the building as an everyday use office, gym or games room with heavy objects.

All garden buildings should be assembled on a firm and level base. A base will ensure your building has a solid, long-lasting and well-drained foundation.

If you want to build your own base, from a sturdy material such as concrete or flagstones, you can find minimum dimensions for each size of this building in the tech specs. In order to protect your building from moisture, you should leave a 2ft gap around the exterior of your building, so remember to take this into consideration when laying any sort of base.

Our robust and simple to use EcoBase provides you with a firm, long-lasting foundation with suitable drainage for your garden building. It is quick and easy to install through the use of snap connectors that link the grids to each other.

If your building is shorter than 2.5m you should not require planning permission, (unless it’s more than 50% of your garden or will be placed in your front garden). Planning permission rules can vary by area so we would strongly recommend checking your local council rules before purchasing a garden building from us.

We do not offer an installation service on any of our buildings, as they are designed to be easy and simple to assemble. Using the digital assembly instructions included in your order confirmation and with a team of at least 2 people, the handy pre assembled panels mean you will have your BillyOh building up in no time!

Our sheds and summerhouse are delivered in easy to assemble panels. For your convenience the panels are no wider than 4ft so they can be easily maneuverable and fit through a standard doorway. Glazing and any additional wood is delivered in separate, clearly labeled packages.

Your order can be tracked through the account section on our website or by contacting us directly. You will be contacted after your order via your online account, email or text to provide updates on delivery dates.

We offer a pay by finance option on any purchase over the value of £560.

Our simple finance options allow you to spread the cost of your purchase over 24, 36 or 48 months.Read more about our Pay by Finance option here.