Planning Free Mobile Home

Planning Free Mobile Home

A selection of residential timber frame and log cabin models without the need for planning approval. These timber buildings can be sited on the drive or in the garden of a main dwelling. Add new living space and increase the value and use of your property.

Laws relating to touring caravans also apply to year round accommodation on a larger scale, so these models are regarded as ‘static caravans’ or ‘mobile homes’. The services are extended from the main dwelling to the new building, and it must be used to accompany the house (by a family member or as guest accommodation), not rented as a private residence or a separate dwelling or business.

These models may be deemed as ‘mobile homes’ but our build quality is to full residential specification to meet building regulations – way beyond the flimsy, substandard BS3632 specification associated with holiday parks that you may be offered elsewhere.

If you would like one of these mobile home or granny annexe models in the grounds of your main house, we advise applying for a Lawful Development Certificate (LDC). It is issued by your local planning authority (LPA). You may wish to apply yourself, or we can do it for you with our Mobile Home Planning Service.

If you’d like more information on the subject and how to apply for a LDC, please take a look at our Planning Free Mobile Home guide.

Build Type
  1. Timber Frame
  2. Log
Number of Bedrooms
  1. 0
  2. 1
  3. 2
  4. 3
  5. 4
  6. 5
  1. 1
Length (m)
4.0 20.0 4.0 to 20.0
  • Timber Frame
    • Single-storey timber frame models delivering maximum space in a longer, narrower package. Traditional to contemporary in style. Generous living spaces with sliding/bi­fold doors and verandas to link to the outdoors.

    • Flat roofs, high ceilings, and lots of glazing combine to form this distinctly modern timber frame range. Big living spaces with sliding/bi-fold doors to bring the outside in. Delivering maximum space in a longer, narrower, single-storey package.

    • Modern spaces with signature curved glulam timber beams. Floor-­to-­ceiling glazing throughout to connect with the outdoors and create light-­filled spaces.

    • Curved roofs and high ceilings with exposed glulam timber feature beams. Modern, single­-storey spaces. Generous living areas and floor-­to-­ceiling glazing for light-­filled spaces.
    • Timber frame construction with passive house technology – the ultimate in energy efficiency and performance. Super insulated with argon filled triple-­glazing to achieve the lowest U­-values (just 0.11 for our show home), which means tiny heating bills and minimal carbon footprint.

      By 2020, all new buildings in Europe shall be constructed to this standard.

      These models feature lots of natural light and utilise passive solar gain. A mechanical heat recovery ventilation system can be used, rather than traditional heating and air-conditioning systems, to create superior levels of comfort compared to normal homes. It provides a constant supply of fresh air, and the interior maintains a comfortable temperature, from the coldest day of winter to the hottest day of summer.

      While this range has been designed to incorporate passive house technology, any of the models can be scaled back to a standard residential specification, if required.

  • Single / Twin-Skin Log
    • Single­-storey log models delivering maximum space in a longer, narrower package. Traditional to contemporary in style. Generous living spaces with sliding/bi-­fold doors.
    • Smaller, single/twin­skin log models. From studio spaces to 2/3 bedroom models on a footprint up to about 50m2. Traditional to contemporary in style.
Quick Reference
  • 3632
    Sets out the minimum standard for residential buildings (below UK Building Regulations). It usually applies to caravan and park homes. We feel this is a substandard specification – offering inadequate insulation and flimsy build quality – so all our buildings, including our park homes, go far beyond this. We build to full residential house standards and UK building regulations, or beyond.
  • Bi­fold doors
    Bi­-fold doors consist of a number of glass panels that can be folded together and to one side. They are a great option to create a light-­filled space, connecting the living areas to the outside.
  • Building Regulations
    Building regulations are in place to ensure your finished build is safe, efficient and long-­lasting. Our timber frame and twin­-skin log models are designed to fully comply with UK building regulations (including the new Eurocode 5) as standard. In fact, we can build to stricter, Scandinavian regulations and Tek10 for ultimate performance and future proofing. Not all buildings/instances require building regulations, but if you intend to use your new building for sleeping accommodation, and it can't be classed as a 'mobile home' building regulations will usually be required.
  • C-­value

    This is a measurement of how strong the timber is. The timber's characteristics are graded against permissible limits for the timber species. The higher the number, the stronger the timber. A common strength class in the UK is C16. We only use timber of C24 to C40 (more in line with demanding Scandinavian requirements) to ensure the highest quality possible.

  • Eurocode 5 (EC5)
    Eurocodes are a series of standards that establish common rules across the European Economic Area (EEA) for structural design using any material. EC5 is the suite of standards specifically relating to timber structures. It replaces BS 5268, which is no longer maintained by BSI (British Standards Institution). Our buildings comply with EC5.
  • FSC
    The Forest Stewardship Council is the hallmark of responsible forest management, and the most widely recognised forest certification system worldwide. We only use FSC­ approved timber, so you know your new building has been responsibly sourced.
  • Glulam/Laminated
    For maximum quality we use glued laminated timber (glulam) for our residential log buildings, as opposed to standard solid timber. Solid timber moves throughout the year because of shrinking/swelling, and it splits easily, too. Glulam is engineered from 40mm layers of timber (woodgrains in opposing directions) bonded together to increase strength and stability. It won’t rot, shrink, crack or split – it’s virtually maintenance free, and lasts a lifetime. Glulam can conform to building regulations because structural calculations can be made that aren’t possible with standard solid timber. If you prefer a plasterboard interior finish in line with modern houses, rather than the traditional timber look, glulam makes it possible to add framework and plasterboard to the internal walls that are external facing.
  • Granny annex
    See 'mobile home'
  • Insulation
    Our buildings are designed to be enjoyed all year round, with unrivalled levels of insulation as standard. Insulation is built into our timber frame panels, and is added between the wall layers of our twin­-skin log buildings. We can insulate according to the U-­values the building needs to achieve, right up to passive house standards, but as a guide 100mm of insulation is very efficient for most requirements to cover walls, 175mm insulation for floors, and 215mm in the roof.
  • Larch (Siberian)

    We favour Siberian larch for our timber frame builds because of its excellent durability, dimensional stability (minimal shrinkage/swelling), and aesthetic beauty. It grows very slowly, making it extremely dense and strong when compared to other softwoods. In fact, Siberian larch is one of the toughest and most durable softwoods in the world. It can be painted or treated to maintain its straw­like colour, or when weathered it transforms to a beautifully consistent silver/grey, which is highly desirable in many cladding projects. Siberian larch should not be confused with the dark pink British/European larch that grows faster and not as dense in a warmer, wetter climate. Siberian larch also contains fewer knots – for a clean, contemporary, and consistent look – and, unlike British/European larch, its knots are light in colour and remain solid, even after drying and machining.

  • Log

    Alternative to timber frame construction, offering the traditional log cabin look of timber inside and out with interlocking exterior feature corners. Constructed log­by- log, rather than from sections/panels, this type of build is well suited to sites with restricted access. Log buildings are available as single or twin­skin glulam.

  • Mobile home

    A selection of our models can be classed as a 'mobile home'. Built to our usual residential house standard for all year round enjoyment (not the flimsy, substandard BS3632 specification associated with holiday parks), these can be up to 20 x 6.8m and feature multiple bedrooms. The big advantage is that if the building is going in the grounds of your main house, you could add new living space without needing planning approval and increase the value and use of your property.

  • Passive house technology

    Creates a super insulated energy efficient home, with tiny heating bills, minimal carbon footprint, lots of natural light and superior levels of comfort compared to normal homes. We can design passive house technology into our residential models. The interior maintains a comfortable temperature – from the coldest day of winter to the hottest day of summer – without traditional heating and air- conditioning systems. The thickness of the walls, roof and floor is greatly increased and all glass upgraded to argon- filled triple glazing to achieve the incredible levels of insulation and U­values required. A mechanical heat recovery ventilation system provides a constant supply of fresh air using only a fraction of the energy consumed by a typical house.

  • Permitted Development

    Single-­storey outbuildings can be considered as permitted development; without needing planning permission. Located to the rear or side of a property, they must be ancillary to the main dwelling and not contain living accommodation – office/studio space for example. The footprint can be up to 50% of the total area of land around the house. The maximum height for a dual pitch roof is 4m (3m for other roof types [e.g. mono pitch or flat]), and 2.5m if within 2m of the property boundary. Building regulations approval is not usually required up to 30m2 in floor area (no sleeping accommodation). More information can be found at

  • Planning Permission

    Full planning permission is normally required if a building does not fit the criteria for a 'mobile home' or a 'permitted development'. More information can be found at

  • Single-­skin

    Type of log construction featuring a single wall layer, or skin. With only one wall layer, plumbing and electrics are face­mounted – so pipes and cables (inside conduit) can be seen running along walls – and the wood itself is the insulation. For hidden electrics and plumbing, and additional insulation see 'twin­skin'.

  • Sustainability

    Timber is the only mainstream 100% renewable building material. Increased demand means increased sustainable managed forest to supply it, so its a win-­win situation. Timber has the lowest embodied energy and best thermal insulation properties of any mainstream building material. Our timber is FSC­approved and comes straight out of the forest and into the mill, so handling is minimal. Our timber buildings are built to order and precision engineered in factory-­controlled conditions, so wastage is minimised, and so are post erection quality/snagging issues. Timber buildings are quick to erect, so on site construction time and resources is greatly reduced.

  • Timber frame

    Constructed from sections/panels with full insulation built in, this type of build gives you a plasterboard interior finish inline with modern houses, with plumbing and electrics hidden behind. It’s an ideal option if building regulations is required. The exterior features vertical Siberian larch cladding to provide a clean, contemporary, and consistent look.

  • Twin skin

    Type of log construction featuring two wall layers, or skins. The plumbing and electrics are hidden between the two wall layers. Insulation is added here too, which makes twin-skin a good option for residential log builds, particularly if building regulations are required.

  • U­-values

    U­-values (also known as ‘heat transfer coefficients’) are a measure of how effective a building element (such as a wall, floor, roof, etc) is at preventing heat from transmitting between the inside and the outside of a building. The lower the U­value, the less energy is required to maintain comfortable conditions inside the building. U-­value requirements are part of meeting Building Regulations. Our buildings are designed to be high performance. High levels of insulation and quality features such as double, triple, and argon­filled glazing ensure low U-­values, all the way to passive house standards – like we’ve achieved on our show home.