What Size Should Your Oak Frame Outbuilding Be? (Devon Guide)
This is where most people go wrong — before anything is built.
They ask:
👉 “How big should we make it?”
But what they’re really doing is guessing.
And guessing size is what leads to:
wasted space
planning problems
or buildings that don’t get used properly
BEFORE YOU THINK ABOUT SIZE
Size only makes sense when two things are clear:
what the building is actually for
what budget you’re working within
Without those, size becomes arbitrary.
If you haven’t grounded your budget yet, stop here first
👉 Learn more about oak frame outbuilding cost in Devon
STEP 1: DEFINE WHAT THIS BUILDING NEEDS TO DO
Forget dimensions for a second.
Ask:
👉 What happens inside this building — day to day?
Because:
a workshop needs space to move and store
a home office needs proportion and light
a multi-use space needs flexibility
👉 Different uses demand completely different sizes
If this isn’t clear yet, any size you choose will be wrong.
STEP 2: UNDERSTAND THE THREE REAL OPTIONS
Most projects don’t exist on a spectrum.
They fall into three clear categories:
Small (Defined & Limited)
Used for:
storage
log stores
compact workshops
What works:
tight, efficient footprint
very specific purpose
What doesn’t:
flexibility
future use
👉 This only works when the use is very clear
Medium (Where Most Good Projects Sit)
Used for:
home offices
garden rooms
hobby spaces
What works:
balance
usability
long-term flexibility
👉 This is where most well-designed outbuildings land
Large (Where Mistakes Happen)
Used for:
multi-use buildings
statement structures
What works:
only when properly designed
What goes wrong:
overwhelms the garden
creates planning issues
drives cost up quickly
👉 Bigger is not better — unless it’s justified
WHERE MOST PEOPLE GET THIS WRONG
They think:
👉 “We’ll just make it slightly bigger to be safe”
That decision alone can:
push you into planning permission
increase groundwork
and significantly raise cost
Before increasing size, understand what that actually means financially
👉 Learn more about oak frame outbuilding cost in Devon
SIZE IS ALSO A PLANNING DECISION
This is where projects get caught out.
Size affects:
height
footprint
distance to boundaries
👉 Which directly affects whether you need planning permission
Before locking anything in:
Make sure your intended size actually fits within the rules
👉 Learn more about planning permission for oak frame outbuildings in Devon
HOW SIZE PLAYS OUT IN THE BUILD
What looks simple on paper rarely is on site.
Larger structures mean:
more structural consideration
more groundwork
more complexity in the build
👉 Size doesn’t just affect design — it affects the entire process
👉 Learn more about how an oak frame outbuilding is built
THE BETTER QUESTION TO ASK
Instead of:
👉 “How big can we make it?”
Ask:
👉 “What’s the smallest size that does the job properly?”
That’s how good projects are designed.
QUICK SELF-CHECK
Right now, which one sounds more like you?
“We want to maximise space”
→ You’re at risk of:
oversizing
overspending
and planning issues
“We’re trying to keep it small to save money”
→ You’re at risk of:
building something unusable
needing to upgrade later
wasting the opportunity
👉 The right answer sits in between — and it’s driven by design, not guesswork
IF YOU’RE STILL DECIDING
At this point, you should have a clearer sense of:
what size category you’re in
what risks come with each
and what needs to be considered before choosing
NEXT STEP (DON’T GUESS THIS)
If you’re thinking:
👉 “I want to get this right first time”
Then stop trying to piece it together from separate ideas.
Start here and see how these buildings are properly designed and built:
👉 Learn more about oak frame outbuildings in Devon