Flat roof garden offices dominate the market because they fall into the 2.5m high height limit for buildings placed within 2 meters of the boundary line, but there are other garden office roof shapes that you should consider. The shape of a garden office’s roof not only plays a significant part in its external appearance, but also impacts on the feel of the interior, and the amount of headroom in the building – a important consideration if you are tall!
As we mentioned above flat roofed garden offices are hugely popular, the main reason is because they can often be built under Permitted Development rules, and if the overall height of the building is less than 2.5m, the garden office can be sited within 2m of the boundary line. Being able to site the building so close to the boundary is a very good use of space, which is particularly important in a small garden.
Although called flat roofs, they are seldom totally flat in order for water to run off the roof, but its worth asking your supplier how well water will run off their design.
Headroom is a concern for people buying garden offices under 2.5m, in reality the ceiling height is only slightly lower than that of a room in a modern house. The actual floor to ceiling height depends on the design and the structure of the office – some floor and wall sections are thicker than others which can decrease the internal headroom, but as a guide a 2.5m high garden office has a average headroom of 2.1m, so unless you are particularly tall this should be more than sufficient.
Known as sloping roof, single pitched or mono roof garden offices, this style of building has a single roof that slopes from either the back to the front of the building or from side to side. Pitched roof designs like this have many benefits over their flat roof counterparts as described above. Firstly because the roof slopes, water will easily run off the structure which is obviously a good thing, also you often have more headroom in a mono pitched garden office albeit higher at one end than the other!
Mono pitched garden offices can be built under Permitted Development rules so don’t always require Planning Permission. The Planning Portal outlines the rules for a mono pitched garden office, they state that the building should be sited more than 2m from each boundary, and should be no higher than 2.5m at the eaves (the bottom of the roof structure) and no more than 3m at the ridge (the top of the roof).
The size of the garden office will effect the pitch (steepness) of the roof within these Permitted Development rules, for instance a small garden office can potentially have a steeper roof than a large garden office when both are complying with the height rules.
Often seen on traditional style garden offices, dual pitched roofs create a building with a light and airy internal space. Many garden office designers take the opportunity of a dual pitched roof to design in some high level glazing or cathedral style windows which can flood the room with natural light.
Like other roof shapes, dual pitched roof garden offices can be built under Permitted Development rules. The rules state that the building must be sited more than 2m from each of the properties boundaries. Height wise the garden office should be no higher than 2.5m high at the eaves (bottom of the roof) and 4m at the ridge (top of the roof).
These height rules create a space with plenty of headroom, much more than other designs. It is worth checking with your chosen supplier as to whether their pitched roof designs have vaulted ceilings, some designs which have a pitched roof have an internal ceiling which obviously lowers the head space.
Another option on traditional style garden offices is the hipped roof. Hipped roofs have four faces and therefore look attractive from all angles.
Hipped roof designs take a lot of skill to build, as they are created by cutting several compound angles, they also use more materials to build than other styles of roof, so as a result you don’t see them often.
Hipped roofs come in two styles fully hipped and half hipped. With a fully hipped design the face of the roof runs from the ridge down to the eaves on all four sides of the building, with half hipped designs two faces of the roof run from the ridge down to the eaves, on the other two faces the roof runs half way down.
Hipped roof designs create interesting internal spaces, with a light and airy feel, often elements of the structure such as the four main rafters are partly visible in the room, but this can be a great feature.
A hipped roof garden office would follow the same rules as a dual pitched designs when it comes to Permitted Development rules, they should be sited more than 2m from the boundary of the garden, no higher than 2.5m at the eaves (bottom of the roof) and 4m at the ridge (top of the roof).
There are a few round garden office designs on the market, and the round form creates an interesting roof shape and space. Depending on the supplier a prefabricated cone shaped roof might be used, on other designs the roof is built in segments which appear to curve around the building.
Round garden offices have vaulted ceilings creating light and airy rooms, the structure of the roof is an attractive feature in itself, often accentuated by glazed domes at the top of the roof.