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BillyOh Tongue and Groove Sentry Box Petite

Perfect for smaller garden spaces, the Pressure Treated Sentry Box Petite is ideal for storage - whether it's for Gardening tools, DIY equipment or clearing up space in your garden. Complete with Floor, Roof, Felt and pressure treatment as standard.

3 x 2 Sentry Box Small

1. Customise

3. Add Extras

Complete your building with optional shelving, guttering, base options, assembly kits and more.

Do you need high quality padlocks, paint, silicone and assembly kits?

Optional Extras:
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  • Compact footprint ideal for small gardens
  • Sturdy Tongue and Groove walls
  • Convenient corner shelves included
  • Windowless for increased security
  • Floor and Roof as standard
  • Complete with felt, fixtures and fittings
  • Base Coat Treated for Transit
Overall Dimensions (Includes Roof Overhang)
  • (A) Width: 0.93m (3ft1)
  • (B) Depth: 0.70m (2ft4)
  • (C) Ridge: 1.67m (5ft6)
  • (D) Eaves: 1.47m (4ft10)

Why buy the Sentry Box Petite?

BillyOh<br/> Guarantee

Protects the wood on your building against rot and decay.

UK<br/> Manufactured

Over 20 years of experience in design and production.

Easy To<br/> Assemble
Easy To

Made of pre-assembled tongue and groove panels, this shed is simple to assemble yourself.

Complete<br/> Building

Floor, Roof, Felt and Fixings all included as standard.

Key Features

European Sourced Timber

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

Durable Tongue & Groove

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

Green Mineral Felt

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

Key features
Windowless Design

To keep your belongings safe, secure and out of sight.

Galvanised Ironmongery

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

Shelves Included

Compact corner shelves included as standard to maximise your storage space.

Frequently Asked Questions


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 and Groove walls

    Solid sheet floor

    Solid sheet roof

    Boarded single door

    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.

Yes, 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 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.

BillyOh Sentry Box Petite

If you want to make the most of your outdoor space without giving up your whole garden, or have limited room to work with, the BillyOh Petite is an affordable solution. These outdoor storage buildings offer plenty of space with a compact 3x2ft footprint to help you tidy up garden clutter with a dedicate space. Apex garden storage also provides extra vertical space in this Petite model.

Outdoor Storage Units for Tool Store

Whether its for any combination of garden tools, garden & camping equipment or outdoor equipment this compact garden essential offers ample storage space to help you keep your garden tidy. The included shelves are also the ideal solution for keeping the building tidy as well as your garden.

The lockable doors on this secure space is more than enough for a small lawn mower, garden equipment, and even smaller garden furniture. Get maximum storage capacity with a minimum amount of space taken up, with the ample floor space offered by the BillyOh Petite. Plus, tongue and groove boards for the floors, groove cladding for the walls and even a tongue & groove roof offer protection and stability at ever point of this building for your peace of mind. A windowless shed also has less chance of prying eyes looking at it.

Weather Resistant Storage Box

Make sure your belongings safe in even harsh British weather with a storage shed made from a high-quality and durable material like our European-sourced timber. T&G cladding also creates a tight seal to make the BillyOh Petite even more weather-resistant. Our buildings with tongue and groove cladding also come with a 10-year anti-rot guarantee*. We suggest that you treat the wood after installation and carry out annual maintenance.

Galvanised Ironmongery and Size

Heavy duty hinges and latches are also included, galvanised for maximum weather protection. Out of our wide range of storage shed sizes on offer, the 3x2 footprint of this sentry box is a customer favourite - the perfect size for storage without taking over your garden.

Apex Roof Overhang and Style

The apex roof of this sentry box has a ridge height of: 1.67m (5ft6). Not only does this offer adequate headroom when inside, but the max eaves height and ridge height fall under 'permitted development' for planning permission.

Installation and Assembly

We don't offer an installation service on the BillyOh Petite sentry box because it's so simple to put together! Whilst assembly is required, you and a friend with some basic tools can easily follow the assembly instructions to have your Petite sentry box up and the assembly process over in a matter of hours.

Storage Sheds Base

We suggest investing some time in base preparation before your sentry box is delivered. With a sturdy tongue and groove floor, simply construct your storage shed onto a level and solid base like the timber bearers or Ecobases that we sell, or level paving slabs to give this building a solid foundation.

Garden Buildings Direct - Delivery Times

With a fast and free mainland delivery service on your garden building to most of the UK, simply enter your delivery postcode to get started! We can have your BillyOh tongue and groove sentry box with you in as little as 1 - 4 weeks.

Width 93cm
Depth 70.2cm
Eaves Height (Inc Floor) 146.8cm
Ridge Height (Inc Floor) 167cm
Width (Internal) 73.1cm
Depth (Internal) 64.2cm
Eaves Height (Internal) 144.6cm
Ridge Height (Internal) 159cm
Door Opening Size (w x h) 58.6cm x 138.8cm
Door Height 143cm
Door Width 58.2cm
Floor Material 11mm Tongue and Groove
Roof Material 11mm Tongue and Groove Roof
Roof Covering Material Felt Roofing
Roof Style Apex
Cladding Style Tongue and Groove
Factory Basecoat Treatment Optional - Dip Treated or Pressure Treated
Material Material
Supplied with Fixtures and Fittings Yes
Locking System Turn Button
Pre-Assembled Side Panels Yes
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.

Videos & Guides

Our resource library offers step by step instructions, explanation videos and customer content to help you to plan, buy and build your garden building.


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 a team of at least 2 people, the handy pre-assembled panels mean you will have your BillyOh building up in no time!

See just how easy our buildings are to assemble in this video: