• BillyOh Petra Tongue and Groove Reverse Apex Summerhouse
  • BillyOh Petra Tongue and Groove Reverse Apex Summerhouse
  • BillyOh Petra Tongue and Groove Reverse Apex Summerhouse
  • BillyOh Petra Tongue and Groove Reverse Apex Summerhouse

1. Select Size

Size measured in feet

2. Select Treatment

2. Personalise your summerhouse

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
  • Wide opening double door for easy access
  • Variable door positioning to suit your needs
  • Base Coat Treated for Transit
Overall Dimensions (Includes Overhang)
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  • (A) Width: 3.58m (11ft9)
  • (B) Depth: 2.60m (8ft6)
  • (C) Ridge: 2.34m (7ft8)
  • (D) Eaves: 1.73m (5ft8)

Testimonial

"I was truly impressed with what I received. Exactly what I wanted at the fraction of the price I was expecting to pay, added to this the delivery service was first class. I'll be recommending your service to my friends."

Why buy the Petra Summerhouse?

Superior Quality
Superior Quality

Ensuring the BillyOh quality in every building

UK Manufactured
UK Manufactured

20 years of garden building experience and dedication

Adaptable to you
Adaptable to you

Variable door positioning to suit you

Extra 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.

Galvanised Ironmongery

Making your summerhouse last longer by reducing the risk of rust for years to come

Durable Tongue & Groove

Thick durable tongue and groove boards throughout.

Tear Resistant Felt

High performing waterproof felt, giving you the ultimate roof protection.

Shatterproof Glazing

Improving the structural durability and strength of your summerhouse

Adaptable Configuration

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

And much more...

  • Modern reverse apex design
  • Long windows
  • Variable configuration
  • Wide opening double doors
  • Interlocking timber boards
  • Tear-resistant felt
  • Easy to build
  • Shatter resistant windows
  • Pressure treated lasts longer
  • Protected during delivery
  • Fixtures and fitting included
  • Full assembly instructions

20 years of
Market Experience.
Lots of Happy Customers

Explore how we have made some of our million+ customer's happy throughout the years.
Find out below and try the Expert Reverse Apex for yourself.

Trustpilot
Trustpilot

Frequently Asked Questions

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

EXPAND ALL COLLAPSE ALL

Will I need planning permission for this building?
If the building is shorter than 2.5m tall you should not require planning permission, (unless it’s more than 50% of your garden or to be put in your front garden). Planning permission rules can vary by area so we would strongly recommend checking your local council rules before ordering from us.

What's the difference between a base and a floor?

We'd recommend any flat and level base be put in place before you start construction of any of our buildings. The material can vary so long as it creates a flat and level base, many cutomers opt for Concrete, Paving Slabs or our popular Ecobase and EzeBase options available above. The floor of the building comes with bearers which lift the building off the base and allows the flooring to have a gap between itself and the ground this helps slow down or stop any rotting that could occur if the wood is kept in standing water.

How often do I need to treat my building?

The building should be treated once fully assembled and within one month of recieveing the product. All the treatments we supply ensure the building will only need to be treated once a year, but always consult the directions on the treatment that you have purchased. Pressure treated building dont need to be treated annually but may need to be topped up in its later life.

How long does it take to assemble this building?

This building is designed & made of preassembled panels, that make assembly super simple. With a team of just 2 people and a bit of DIY knowledge you can expect to have your BillyOh building up within a day, with many smaller buildings easy to assemble in as little as 3-4 hours.

Does my shed need to go on a base?

Our buildings are designed to be built on a flat, solid, level base. Many customers opt for a concrete or paving slab base, but for an easy cost effective base option, look no further than our popular Eze Base or Ecobase options for a simple, low cost bases

Does this product come with a guarantee?

We currently offer a 10 year guarantee on all of our buildings.

Do you offer Finance?

We offer a pay by finance option on any purchase over the value of £560. Read more about our Pay by Finance option here.

How is the building delivered?

Sheds are delivered in handy preassembled panels, which can be easily fixed together to create your shed.

Can I insulate my garden building?

Our sheds and summerhouses have cavities in the walls between the framing that will fit many common insulation materials inside. Although we do not recommend insulating your building as it has not been tested on our buildings, and would void your manufacturers warranty. More information can be found in our terms and conditions.

How many people does it take to assemble this building?

For all buildings it is recomended that 2 people build together.

What tools do I need to install my building?

Our buildings have been designed to be built with common DIY tools, such as a Drill, Screwdriver, Saw and a Hammer being the key tools needed to assemble. A Ladder comes in handy for taller buildings and a Spirit Level and Tape Measure are good ways to make sure your building is level and neatly built. Many of these tools can be found in the Value Assembly Kit sold above as a quick simple way to get the tools you need.

Can I track my order?

Your order can be tracked through the account section on our website or by contacting us directly. You will be contacted after your order by our helpful care team to arrange delivery of your building.

Does this come with instructions?

Yes! All our products come with a digital instruction booklet, which will be emailed to you to read through before your order is delivered! Instructions can also be downloaded from your online login.
Dimensions 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 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 318.3cm 259.8cm 259.8cm 318.3cm 259.8cm 318.3cm 318.3cm 318.3cm 318.3cm
Width (Internal) 346cm 287.4cm 346cm 463.2cm 346cm 346cm 463.2cm 463.2cm 463.2cm 580.4cm 580.4cm
Depth (Internal) 234.4cm 234.4cm 293cm 234.4cm 234.4cm 293cm 234.4cm 293cm 293cm 293cm 293cm
Ridge Height (Inc Floor) 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
Ridge Height (Internal) 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
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
Door Width 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
Materials 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
Floor Material Optional Optional Optional Optional Optional Optional Optional Optional Optional Optional Optional
Roof Material Optional Optional Optional Optional Optional Optional Optional Optional Optional Optional Optional
Roof Covering Material Optional Optional Optional Optional Optional Optional Optional Optional Optional Optional Optional
Features 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 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 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
Roof Style 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
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.
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