Size measured in metre

2. Select Treatment

2. Customise

Add More Storage

Add additional storage space to your log cabin with this simple interlocking Lean-To Option. Put those garden tools, mowers, garden furniture out of site keeping your cabin free from clutter. This Option can easily be reversed to suit your needs, and is assembled at the same time as the main cabin before the roof is fixed.

The Lean to can be placed in the positions indicated above, for detailed sizes and floor plans check the download in the documents tab below. Main building dimensions do not include the lean to.

Whats in The Box: Cladding of your choice (19mm/28mm), Solid sheet Roof, Solidsheet floor, Boarded Door, Green mineral felt, Padlock and Hasp, plus all fixings.

Modern or Traditional

Give your building a classic look or contemporary feel.

•Double-glazing offers better insulation for all-year-round use and our best noise reduction for your building. Glass used is toughened for your safety and is fitted before delivery to you.

•Single-glazingis made 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 the properties of glass shattering.

Solid Underfoot

Increase the floor thickness for a much stronger platform to support your interior items.

•Premium flooring gives you the strongest platform and is suitable for high intensity use. 19mm tongue and groove boards are used.

•Standard flooring gives you a solid platform and is suitable for medium intensity use. 11mm tongue and boards are used.

Add More Strength

Retain more heat with a thicker roof, giving you greater comfort in the winter months.

•Premium roofing is heavy-duty and supports our premium shingles. Recommended for large buildings. 19mm tongue and groove boards are used.

•Standard roofing is suitable for mineral felt, but can also take the weight of shingles on small and medium cabins. 11mm tongue and groove boards are used.

Protect from the Elements

Keep your building in excellent condition with our choice of weather protection.

•Premium - Shingles offer you the highest level of protection. They are long-lasting, waterproof, UV resistant and carry an SAA fire rating.

•Standard - Mineral Felt is quick and easy to apply and adds a standard level of defence against the weather.

•Basic - the cabin is supplied with no roof covering. You will be required to source your own roofing material if other options are not selected.

Transform your Log Cabin into your own bar with this garden bar unit

3. Add optional extras

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


  • Apex Style with front Overhang in Modern or Georgian Style options
  • Spring, Summer, Autumn and Winter Garden Office or Family Room
  • Reversible Extra High Offset Door and window Design
  • Strong Tongue and Groove construction
  • 28mm Single Tongue Wall Cladding
  • Pressure Treated Option Available
  • Optional Extras; Storage, Garden Bar, Roof Covering and more
Overall Dimensions (Includes Overhang)
  • (A) Width: 4.65m (15ft3)
  • (B) Depth: 4.12m (13ft6)
  • (C) Ridge: 2.47m (8ft1)
  • (D) Eaves: 2.09m (6ft10)


"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 you'll love the

BillyOh Montana Log Cabin

A Modern Alpine Chalet Style Cabin with Front Overhang

Roof Thickness's
Optional Floor
Thickness's Available
Fixtures and
Fittings Included

BillyOh Montana Log Cabin Key Features


Most Popular

Available in
Different Sizes

Additional Storage

Apex Building

Customise To Suit Your Needs

Solid and Strong Construction, Made in UK - Cladding Thickness Options

Increased Headroom

Multiple Size Options Available

Pressure Treatment Available For Low Maintenance

Modern Contemporary or Traditional Georgian Styles Available

Better Protection and Headroom

Premium Roof Options

Optional Floor Materials

And More Storage

And there's more...

What's Included

  • Optional T&G Floor
    (Bearers, 11mm, 19mm)
  • Optional Roof Cover
  • Pressure Treating Option
  • Georgian and modern glazed Door options
  • 28mm T&G Interlocking Boards
  • 11mm T&G Roof Boards
  • All Fixtures and fittings
  • Pressure treated bearers
  • Comprehensive instructions

Designed with You in Mind

Designed with You in Mind

Solid, Interlocking Timber Construction

Solid, Interlocking Timber Construction

Front Overhang Building Feature

Front Overhang Building Feature

Designed with you in mind

Designed with you in mind

The Montana has been upgraded with extra-high doors to make getting into the building easier. The eaves height (the lowest point of the roof) has also been raised, giving you a greater average ceiling height.

Spacious and bright: With a generous height of 6'2", the Montana's door opening accommodates the majority of adults, making it easy to move in and out of the cabin without any problems. The windowed door and accompanying side windows provide the log cabin with plenty of sunlight during the day, perfect for relaxing during warm summer days.

Faster and easier: The Montana has an overall building height of just below 2.5 metres, giving it a greater chance of avoiding issues with current planning regulations. Nevertheless, we still strongly advise contacting your local area's council for information on this, as different council boroughs can vary.

Available in 2 Sizes, 4m x 4m and 4m x 5m, the Montana is suited to those with smaller garden spaces. The 4x4 option, also available pressure treated, is ideal for a garden getaway which will fit in and compliment almost any outdoor living space.

Customise to suit your needs

The Montana lets you customise several important aspects of the construction, so you can get the exact building you want. The log cabin can be assembled in several different configurations, letting you place the doors and windows in the optimal position for your garden layout. We also give you the choice of building size, floor timber thickness, door and window style, glazing style and roof covering to create the perfect garden building for your requirements.

If you have all-year-round use in mind, we recommend the premium 19mm floor for strength and durability, double-glazed Modern style doors and windows for insulation from the cold, and premium roof shingles to give the building long-lasting, effective weatherproofing. For a standard summer house only for use during the spring and summer months, single-glazed doors and windows will be sufficient, combined with the Traditional style to give a classic appearance. Then complete the building with roof shingles and premium paint for a great style that's personalised to your tastes.

Customise to suit your needs
Solid, Interlocking Tongue & Groove Construction

Solid, Interlocking Tongue & Groove Construction

The Montana is constructed with interlocking timbers, a traditional building method that gives additional strength to all of the boards. Compared to the technique used for basic panel buildings, this is a far superior method that firmly fixes the timbers in place, using their combined weight to make the structure rock solid.

28mm tongue and groove timber is used for the walls of the building, a standard log cabin cladding that gives the Montana reasonable durability and insulation whilst still remaining affordable. With walls that are much thicker than the typical garden shed, it has a sturdy construction to give you peace of mind and longevity.

Pressure Treatment Options

For ultimate protection and longevity of your building, we recommend opting for a pressure treatment. Pressure treatment is an extra step in the construction process where the wood is treated in a pressurised tank and chemical preservatives are forced deep into the wood’s fibres to resist rot, weathering and pests.

This protects the wood inside-out which is better than regular treatment spraying or using rollers which only coats the surface of the wood. By pressure treating the wood, you are left with a building that is low maintenance and cost-effective. You will save money in the long run and free yourself of maintenance worries.

Pressure Treatment Options
Pick your cabin's style

Pick your cabin's style

We give you the choice of two stunning building designs, letting you get the window styling that's right for you. Both styrene-glazed and double-glazing options are available in either style, so you can choose the level of insulation you need for your building. And with either style you'll also enjoy the unique feature of the Montana's front overhang, for an appearance that's full of character.

Traditional Style (Georgian bars) – Premium and Standard options: The Traditional Style Montana Log Cabin features Georgian crosses upon the doors and windows, giving the building a classic British feel. Choose Standard for single styrene-glazed windows if you just have a seasonal summer house in mind, or Premium for an upgrade to double-glazing that will help keep you warm all through the year.

Modern Style – Premium and Standard options: If you'd prefer a more contemporary design for your building, then the Modern Style is for you. This offers a clean, minimalistic feel without Georgian bars. Once again, you'll also have the choice of Standard or Premium Glazing options to suit the intended use of your log cabin.

Solid under foot

The heavy-duty Premium floor option is ideal if you have an everyday building in mind, such as a home office for example. Alternatively, Standard is an adequate choice if you just need seasonal domestic use.

Premium – heavy-duty floor: A Premium floor is the perfect choice for higher intensity usage. It's fantastic games rooms, home offices, home gyms or summer houses with heavy furniture. The construction uses thick 19mm tongue and groove timber, which gives you insulation against the cold weather, making the log cabin easier and cheaper to heat during Autumn and Winter.

Standard – regular floor: We offer the Standard floor option for less demanding and frequent usage, suitable for lighter intensity purposes like summer houses and other living spaces containing light furniture. 11mm tongue and groove timber makes this is a suitable economic option.

Basic – your bespoke DIY floor:

If you're a DIY expert with specific requirements, we offer you the Basic option. The building will be supplied with the bearers only, letting you build the base completely from scratch to your liking.

Solid under foot
Sturdy overhead

Sturdy overhead

Tongue and groove roof boards: The Montana's roof panels are constructed from quality tongue and groove timber, consistent with the rest of the log cabin. This helps increase the building's weather resistance and its overall longevity, making sure that it's built to last.

Increased strength:

The roof purlins for the log cabin are strong and thick, giving the roof plenty of strength and support for your peace of mind. This also gives it the strength necessary to support more substantial roof covering, meaning it's able to take the weight of both roofing felt and roofing shingle for added protection from the elements. Ensure you take a look at our fantastic roof weather protection options.

Protect the roof

Due to its position on the building, the roof is the part of the building that's most exposed and vulnerable to the weather, so it needs good protection. Choose one of our great roof weather protection options to make the Montana water-tight and keep it in great condition from day one.

Premium weather protection: For the very best weathering capability available, fit your Montana log cabin with Premium heavy-duty shingles, available in a selection of green, red or black. These are far thicker than our Standard weather protection option, providing the building with extra durability and value, as well as adding style. Our roofing shingles are UV resistant, water-proof, carry an SAA fire rating and are very long-lasting.

Standard weather protection: The Standard weather protection option offers mineral felt, of which is used for our premium garden sheds. This is quickly and easily applied to the roof, giving your log cabin a basic level of defence against the elements.

Basic: Basic is the option for you if you intend to supply your own roofing materials separately.

Protect the roof
Dimensions 4.0 x 4.0m
Width 464.9cm
Depth 412cm
Eaves Height (Inc Floor) 209cm
Ridge Height (Inc Floor) 247cm
Door Opening Size (w x h) 156cm x 187.6cm
Width (Internal) 383.4cm
Depth (Internal) 323.4cm
Window Dimensions 72cm x 125cm
Cladding Sizes Available 28mm
Materials 4.0 x 4.0m
Glazing Material Single Glazed (SAN) or Double Glazed (Toughened Glass)
Floor Material Optional
Roof Material Tongue & Groove
Roof Covering Material Optional
Features 4.0 x 4.0m
Veranda Available? No
Cladding Style Tongue and Groove Interlocking Boards
Windows 3 opening windows
Factory Basecoat Treatment Optional
Overhang Style Alpine Style Overhang
Shed Type Workshop, large sheds workshops, Large Shed
Roof Style Apex
Pre-Assembled Side Panels No
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.