Speak to a designer Get my 3D concept
Diogel Architecture · See It First

See your home as it could be — before you build it.

A designer draws your extension in 3D, costs it honestly, and tells you straight whether the council will say yes. In days, not months.

Get my 3D concept £395  ·  credited in full if you go ahead
★★★★★   Rated by UK homeowners 30-day money-back guarantee We handle the council — not you In your hands in 3–5 days
The reason it never gets started

You've got the vision. You just can't see it — or cost it.

Most homeowners sit on an extension for years. Not for lack of wanting it — because every next step feels expensive, risky, or impossible to picture.

"The house isn't too small — it just doesn't work. The kitchen's cramped and we're out of bedrooms."
Outgrown home
"I can't get my partner to see what I'm picturing. We keep going round in circles."
Can't visualise it together
"I've no idea what it'll cost — and I'm scared a cheap quote is hiding the real number."
Cost uncertainty
"Will the council even allow it? I've heard the horror stories about delays and refusals."
Planning fear
"I don't want to commit £2,000 to an architect just to find out if it's possible."
Fear of being locked in
"I need a home that lets Mum keep her independence — without anyone moving out."
Adapting for family
A real design, not a mood board

See the actual extension — rendered on your home.

Not a flat 2D drawing you have to decode. A photoreal 3D concept of your new space, drawn from your home and your brief, that you can walk around and actually believe.

This is the moment the project stops being an argument and starts being a plan.

3D render of a rear extension
3D render of a kitchen and dining space
Inside, too

Step into the rooms before they exist.

Kitchens, living spaces, loft bedrooms — see how the light falls, how the layout flows, and whether it feels like the home you've been imagining.

Every concept comes with an honest build-cost range and a plain-English planning verdict, so you're deciding with your eyes open.

Recent Diogel concepts

The kind of thing you'll get to see.

Loft conversion bedroom
Loft conversion — master bedroom
Living room render
Open-plan living
Front elevation render
Front elevation
Kitchen render
Kitchen & dining
Rear extension render
Rear extension
The offer

"See It First" — your home, in 3D, for £395.

Everything you need to decide whether to go ahead — before you commit to full plans or a single builder.

  • ✦A 3D concept of your new spaceDrawn by a real designer from your home and your brief.worth £450
  • ✦A realistic build-cost rangeHonest £/m² numbers, so you know the ball-park before you fall in love with it.worth £150
  • ✦A plain-English planning verdictPermitted development or full application — we tell you straight, up front.worth £200
  • ✦One free revisionNot quite right? Tweak it. Your concept, your call.worth £120
  • ✦A designer walkthrough videoEasy to share with the partner who "just can't picture it".worth £90
£1,010 value
£395
The full £395 comes straight off your detailed design & planning fee if you go ahead.
Get my 3D concept →
30-day money-back · No call required · No commitment
How it works

Three steps. No sales call, no waiting on a quote.

STEP 01

Tell us about your home

Your address, a few photos, and what you're hoping to achieve. Five minutes, right after you order.

STEP 02

We design it in 3D

A designer draws your concept, costs it, and checks the planning angle. Back to you in 3–5 days.

STEP 03

You decide, eyes open

Love it? We turn it into council-ready plans and your £395 comes off the fee. Not for you? Money back.

Why this is the smart first step

Better than an architect's deposit — and safer than a cheap drawings service.

The usual route

  • ❌ £2,000+ committed before you can even picture it
  • ❌ Flat 2D drawings you can't really read
  • ❌ You chase the council yourself
  • ❌ Cheap quotes that hide the real cost later
  • ❌ Weeks of back-and-forth before you see a thing

The Diogel "See It First" way

  • ✅ £395 to see it in 3D — credited if you proceed
  • ✅ A concept you can walk around and share
  • ✅ We handle the council, building control & engineers
  • ✅ An honest build-cost range, up front
  • ✅ In your hands in 3–5 days

It's simple maths: you're about to think about spending £50k–£150k on building work. Spending £395 to find out if it's even worth it — and what the council will allow — is the cheapest decision you'll make on the entire project.

In their words

Homeowners who started exactly where you are.

★★★★★

"Finally got my husband to actually see what I'd been describing for two years. And the cost range stopped us overspending."

— Steph H.
★★★★★

"They told us straight what the council would and wouldn't allow before we spent a fortune. No pushy sales call — just a brilliant 3D design."

— Sonny & partner
★★★★★

"We weren't ready to commit thousands to an architect. The perfect way to see the potential first. We're going ahead now."

— C., renovation
Build note: swap these three placeholders for your own Google reviews — the close-out engine will grow this fast.
Before you ask

The questions everyone has.

Will the council actually allow it?

That's exactly what your planning verdict tells you. We'll say up front whether your idea falls under permitted development (quicker, cheaper) or needs a full application — and if you go ahead, chasing the council is our job, not yours. We check in every couple of weeks and give you the reference number.

How much will the actual building work cost?

Your concept comes with a realistic build-cost range based on real £/m² figures for your type of work — not a vague guess, and not a suspiciously low number that balloons later. You'll know the ball-park before you decide.

I need to talk it over with my partner / family first.

Perfect — that's what the 3D walkthrough video is for. Instead of trying to describe it, send them something they can actually see. Most "I need to think about it" really means "I can't picture it yet." This fixes that.

Do you need to visit my home?

We design from your address, photos and brief to keep it fast and affordable. If you go ahead to full plans, we carry out a proper measured survey as part of the detailed design.

What if I don't like it?

You get one free revision to get it right. And if it's still not for you, the 30-day money-back guarantee means you're not out of pocket. No risk.

Is the £395 on top of the cost of full plans?

No — it comes straight off. If you decide to go ahead, the entire £395 is credited against your detailed design and planning fee. It's the first step, not an extra cost.

Your home, the way it should be

Stop picturing it. Start seeing it.

A designer-drawn 3D concept, an honest cost range, and a straight answer on planning — for £395, credited in full if you go ahead.

Get my 3D concept →