One of the most common questions from prospective buyers is 'my garden slopes — is that going to be a problem?'. In almost every case, the honest answer is no. If anything, a sloping site produces a more architecturally interesting building than a flat one — a floor deck that sits at a consistent internal level while the ground gently disappears underneath is a very handsome thing to look at.
How we deal with a slope
Every Arden & Oak building sits on a steel-anchored foundation. Each screw is driven independently to its own depth, torqued to a common load rating regardless of how far above ground the top of the screw ends up. On a sloping site, that means the four corner screws might be driven to visibly different heights — the internal floor deck is perfectly level, and the varying gap between deck and ground is bridged with cladding that runs down to meet the earth.
How much slope can we handle?
Comfortably up to about 800 mm of level change across a standard footprint (typically 4–5 m along the slope). Beyond a metre, we start looking at cross-bracing, engineered stepped floor decks or occasionally recommending a small excavation on the low side. We've built comfortable, weathertight buildings on plots dropping 1.4 m across 5 m of footprint.
What the finished building looks like
From a distance the room appears to sit lightly on the ground. Close up, the cladding continues past the finished floor level down towards the slope, with a shadow gap where it meets the earth — practically a rain-shedding detail, aesthetically a floating plinth. On very steep sites we sometimes clad the exposed side with a shorter panel and infill the gap with planting; either way, the visual result is intentional, not compromised.
What you don't have to do
- Excavate the garden and remove the spoil
- Build a retaining wall on the high side
- Order and pour a stepped concrete raft
- Wait weeks for the level to cure and settle
- Rework the drainage from scratch
What does change on a sloping site
The deck's front edge sits higher above the ground than on a flat site, so we usually design in a small landing step or a short flight of hardwood treads down to the garden. Access is worth thinking about at design stage — do you want a step off the front, or a set of doors on the uphill side that opens straight onto grade?