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BillyOh Annex Log Cabin Wooden Playhouse

The BillyOh Annex Log Cabin Playhouse creates the perfect play space for your children, with a multi-floor open area and a snug on the first floor, it gives your kids a safe place to make their own. EN 71 approved for your peace of mind. Complete with Floor, Roof and Felt as standard.

19mm Annex W3.0m x D2.5m

1. Customise

4. 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?

Eco Base

An alternative to using a concrete base or slabs. A grid system made from recycled plastic which can be filled with gravel to create a sturdy base for your building.

This is a low cost, convenient solution, perfect if you don't already have your own tools. This kit includes: Hard point saw, Safety goggles, Paint brush, Pocket level, Claw hammer, Rigger gloves.

Optional Extras:
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  • Exciting two storey design
  • Strong 19mm Tongue & Groove log walls
  • 11mm Tongue and groove roof and floor included
  • Stable door and Traditional windows
  • Window planters and faux shutters
  • Complete with green mineral roof felt, fixtures and fittings
Overall Dimensions (Includes Roof Overhang)
  • (A) Width: 3.13m (10ft3)
  • (B) Depth: 2.56m (8ft5)
  • (C) Eaves: 1.93m (6ft4)
  • (D) Ridge: 2.40m (7ft10)

Why buy the Annex Playhouse?

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<br/> To Assemble
To Assemble

Interlocking Tongue and Groove boards for easy assembly.

Complete<br/> Building

Tongue and Groove roof, floor and green mineral felt roof covering.

Key Features

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, latches and handles 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.

Key features
Green Mineral Felt

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

Shatterproof Glazing

Durable Single SAN glazing included as standard.

Tongue and Groove Roof & Floor

The heavy duty and hard-wearing boards provide a solid underfoot and robust ceiling.

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

  • 19mm Tongue & Groove Log walls

  • 11mm Tongue and groove roof

  • 11mm Tongue and groove floor

  • 5 Single glazed georgian windows

  • Stable door

  • Internal bunk

  • Internal wall

  • Ladder and internal safety fence

  • Faux windows shutters

  • Window planters

  • Green mineral roof felt

  • All fixture and fittings

  • Comprehensive assembly instructions

Whilst our playhouses are delivered undecorated with the natural wooden surface, encourage your little ones to paint and splash some of their favourite colours so that they can have a colourful play den. There are so many ways to make your little ones’ playpen more homely and colourful looking. A variety of colours can be purchased as an optional extra with your playhouse.
Our playhouses are not designed for children aged under 36 months as there are many small parts, which may be a potential choking hazard. Furthermore, there is often a maximum user weight of 50kg when tower playhouses and two-story playhouses are concerned. We also recommend keeping the playhouses a minimum of 2m clear from any obstructions or other structures.

  • Sturdy interior rails on playhouses with a bunk.
  • Air holes on the rear of the playhouse for safety and increased air circulation.
  • Shatterproof glazing, a safer alternative to glass, which is easily broken and can leave sharp edges.
  • Non toxic treatment or parts
  • Safety finger gap - A 12mm gap around the door which protects little fingers from being trapped.
  • Strong Tongue and Groove construction ensures a robust and solid build.
Crafted from shatter-resistant plastic (SAN) and suitable for seasonal use. SAN is used for its UV properties and the tougher finish avoids breakages, when compared to glass. Single glazing is the perfect choice for seasonal buildings such as summerhouses, play houses and sheds providing plenty of natural light into the building.

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 a team of at least 2 people, the interlocking logs that simply slot together mean you will have your BillyOh building up in no time!

Our Annex Log Cabins arrive as individual boards that are designed to be easily slotted together. This makes assembly easy and gives a strong building with interlocking corners for strength. If you opt for double glazed windows and doors, these are delivered pre-assembled for your convenience.

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 Annex Log Cabin Playhouse

At Garden Buildings Direct, our wide range of wooden playhouses are designed to bring hours of fun packaged in buildings that are of dependable quality. Made from strong tongue and groove cladding, our BillyOh playhouses help you turn your outdoor space into a imaginative get-away for your children. And our log cabin models like the Annex feature an increased wall thickness (19mm) thanks to log walls - perfect for keeping little ones warm in their outdoor playhouse year-round.


Cabin Playhouse Colours

Customise your cottage playhouse with the various colour options available. Pick from our BillyOh range of creative colour and protect paints on our kids playhouses to transform your Annex into a superhero hideout, fairytale castle, or medieval castle.

Size Base

The Annex playhouse comes in a W3.0m x D2.5m base size for ample space to play without taking over your entire garden. We suggest that all garden buildings be built on a level base such as timber bears, level pavers, a concrete base or an Ecobase (available as an add-on). Whatever you choose, make sure that your suitable base is level and built on a firm, long-lasting foundation.

Tongue and Groove Roof, Floor, and Timber Cladding

The quality materials used in the Annex playhouse include a tongue and groove floor and reverse apex roof. This cladding style offers a tight seal against water ingress and protection in even harsh weather. Green mineral roof felt is included for further weatherproofing.


Our playhouses are designed for toddlers' safety and carry a maximum user weight of 50kg. They also feature things like a safety finger gap to avoid trapped fingers, planed timber to combat sharp edges and splinters and SAN-glazed shatterproof plastic windows. The Annex log cabin playhouse is designed with safety in mind and built to EN71 European Safety Standards for you peace of mind, including safety rails and a lovely window box.


Emulating the classic Wendy House style, the Annex features shatterproof windows to both give your children natural light to play by and ensure that they're getting Vitamin D.


Made from high-quality timber we can offer our BillyOh 10-year guarantee against insect infestation, rot, and decay on this high-quality log cabin playhouse kit.

Garden Buildings Direct - Delivery

Get your two-storey playhouse from Garden Buildings Direct in as little as 2 - 5 weeks. We can delivery your BillyOh building via our fast and free delivery service to most of mainland UK. Just enter your delivery postcode to get started!

Width 313.2cm
Depth 255.9cm
Eaves Height (Inc Floor) 193.1cm
Ridge Height (Inc Floor) 239.9cm
Width (Internal) 292.9cm
Depth (Internal) 214.3cm
Eaves Height (Internal) 190.1cm
Ridge Height (Internal) 232.5cm
Window Dimensions 78.5cm x 54cm
Glazing Thickness 0.12cm
Door Opening Size (w x h) 60cm x 117.5cm
Minimum Base Width 307cm
Minimum Base Length 229cm
Frame Thickness (w x d) 3.2cm x 2.7cm
Glazing Material Styrene
Roof Material 11mm Tongue and Groove
Floor Material 11mm Tongue and Groove
Roof Covering Material Green Mineral Felt
Whats in the Box? Instructions, Felt & Fixings Supplied
Windows 5 Windows (All Fixed)
Door: 1 x Stable Door
Decking No
Suitable Age Range: Not suitable for children under 36 months
Material Wood
Cladding Style Interlocking Logs
Locking System Magnetic Safety Catch
Factory Basecoat Treatment Untreated
Supplied with Fixtures and Fittings Yes
Safety Approved EN71 - For Domestic Use Only
Max User Weight g
Has Change Decking Option No
Roof Style Reverse Apex
Toy Type Wooden Playhouse
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: