Building your own home in Devon is achievable, but the honest answer on cost is that it varies enormously with plot, design and specification. As a rough guide, most self-builders in East Devon should budget somewhere between £2,000 and £3,000 per square metre for the build itself, before the plot and fees. Here is how that breaks down and where the money actually goes.
For a straightforward, well-built family home in Devon, build costs currently tend to fall between roughly £2,000 and £2,600 per square metre. That means a modest 120 square metre three-bedroom house might cost in the region of £240,000 to £310,000 to build, while a larger 200 square metre home could run from £400,000 to well over £500,000. Higher specifications, complicated designs, sloping sites and premium finishes push these figures up quickly.
Devon carries a few local cost pressures worth knowing about. Skilled trades are in demand across the South West, materials often cost more to deliver to rural sites, and many plots around towns like Budleigh Salterton, Sidmouth and Exmouth sit in or near protected landscapes, which can add design and planning requirements. Coastal locations may also need more robust external materials to cope with salt air and weather exposure.
In East Devon, the plot often costs as much as the build. Serviced building plots near the coast regularly sell for £200,000 to £400,000 or more, while plots further inland or in less sought-after villages can be found for less. A useful rule of thumb is that the plot typically accounts for a third to a half of the total project value in this part of the county.
Before committing to a plot, check what is actually included. A plot without mains water, drainage or electricity nearby can cost tens of thousands to connect. Sites needing new access, tree work, retaining walls or non-standard foundations, which are common on Devon's clay soils and sloping ground, all add cost before a single brick is laid. A soil survey and a proper measured survey are money well spent.
Beyond bricks and mortar, allow a realistic sum for professional fees and statutory costs. Architect or designer fees typically run at 5 to 10 percent of the build cost, and you will also need structural engineer input, planning application fees, building control fees, warranties, self-build insurance and, in many cases, a Community Infrastructure Levy check, although genuine self-builders can usually claim exemption if the paperwork is done correctly and on time.
On top of that, budget for the items that rarely appear in headline figures: service connections, driveways and landscaping, kitchens and bathrooms above builder-standard allowances, and somewhere to live during the build. A sensible contingency is 10 to 15 percent of the build cost. Devon weather, ground conditions and lead times on materials mean projects here rarely run without at least one surprise.
The biggest savings come from decisions made on paper, not on site. A simple rectangular footprint with a straightforward roof is significantly cheaper to build than a complex design of the same floor area. Fixing your specification early, choosing kitchens, bathrooms, windows and floor finishes before work starts, avoids the mid-build changes that quietly drain budgets faster than anything else.
It also pays to appoint your builder early and treat them as part of the design team. An experienced local contractor can price the design as it develops, flag expensive details before they are set in stone, and advise on what works with Devon ground conditions and planning expectations. Getting a full, itemised quotation rather than a rough estimate makes it far easier to compare builders fairly and to hold the budget through the project.
It can be, particularly given East Devon's high house prices, but it is not guaranteed. If you buy the plot well, keep the design simple and manage the project tightly, self-builders often end up with a home worth 10 to 20 percent more than it cost, plus a house built exactly to their needs.
Allow 12 to 18 months on site for a typical family home, plus 6 to 12 months beforehand for design, planning permission and building regulations approval. Planning in protected areas such as the East Devon National Landscape can take longer, so build that into your timescale.
New self-build homes are zero-rated for VAT, and you can reclaim the VAT paid on most materials through HMRC's DIY housebuilders scheme after completion. Keep every invoice from day one, as the claim must be properly evidenced and submitted within the deadline.
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