Garden room drawings

Garden room & garden office drawings.

Fixed-price drawings for garden offices, studios, gyms, annexes and outbuildings. Most garden rooms qualify under permitted development — no full planning application required. We tell you whether yours does, then draw it the right way.

Estimate my build cost→ Generate my free renovation report→ Check my project feasibility→ See what value it’ll add→ Instant design quote→ Do I need planning permission?→

All free, all online, all in about a minute — no obligation and no card needed.

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2,000+projects

Often PDNo planning needed

From £1,698Or £94/mo

Cedar-clad garden gym with full-width bifold doors open to the patio, fitted out as a home gym with squat rack, dumbbells and rubber flooring.

PD-friendly

Every type of garden room

Whatever you'll use it for, we've drawn it.

Garden rooms are one of our most-asked-for projects — and for good reason. They add genuinely useful space, often without the cost or disruption of an extension. Pick the closest match to what you have in mind:

Garden offices

A purpose-built workspace at the bottom of the garden. Typically 12–20m². Includes power, lighting, broadband, sometimes mini-split air-con. Almost always permitted-development. Add-on: a small WC and tea-point.

FITNESS & WELLNESS

Garden gyms & studios

Dedicated space for weights, yoga, Pilates, dance. We design with the right floor build-up to take impact loads, plus considered ceiling height (2.5m+) and rubber flooring detail in the construction spec.

FAMILY ANNEXE · GUEST USE

Garden annexes

A self-contained one-bedroom unit with kitchenette and shower room. Used for ageing parents, returning kids, Airbnb. Falls outside permitted development if it's a separate dwelling — needs full planning permission.

SUMMERHOUSES & STUDIOS

Garden studios & summerhouses

Multi-purpose spaces — art studio, music room, reading nook, pool house. Generally permitted-development if under 30m² and meeting height/proximity rules. We design to maximise the natural light.

What you get

Drawings tuned for the way garden rooms actually get built.

Garden rooms are usually built by specialist garden-room companies, generalist builders, or DIY enthusiasts. We tailor the drawings & spec to whoever's on the spanner, with enough detail that the council signs off and the build doesn't drift.

See all packages →

Permitted-development feasibility checkWe confirm if your garden room qualifies — saves you the planning fee.
3D Home Scan™Captures your garden's slope, boundaries, existing trees and any drains in the build area.
Lawful Development CertificateFaster & cheaper than a planning app — confirms in writing that your project is legal.
Building regulations checkMost garden rooms under 30m² are exempt — we confirm before any work starts.
Construction-detail drawingsFoundation, frame, insulation, cladding — enough detail for any builder to price accurately.
Trusted Builder Network introVetted local specialists for fixed-price quotes. Standard & Premium packages.
Build cost estimateBased on 2,000+ Arkiplan projects, adjusted for your finish level and postcode.

Planning & building rules for garden rooms

Will your garden room need planning permission?

For most UK homeowners, the answer is no. Garden rooms are usually classed as "outbuildings" under Class E permitted development, which lets you build them without full planning permission — provided you stay within the rules.

Permitted development limits (the most-checked ones)

To qualify under permitted development, your garden room must be:
· Single storey with a maximum eaves height of 2.5m
· Maximum overall height of 4m (dual pitch) or 3m (any other roof)
· Within 2m of a boundary: maximum height 2.5m
· Used incidentally to the main house — i.e. not as a separate dwelling, not lived in
· Not in front of the principal elevation
· Not covering more than 50% of the garden's land area

When you'll need planning permission

You'll need full planning permission if you're in a conservation area, the property is listed, you exceed the size limits above, or you intend the room to be lived in as a separate dwelling (an annexe with a bedroom, kitchen and shower would normally fail this test).

Building Regulations — the part most people miss

Even if you don't need planning permission, you may still need Building Regulations approval. The trigger is usage and electrical work: any garden room with a hardwired electrical supply, or any room over 30m² internal floor area, falls within Part P. We sort this on your behalf.

For more on the rules, our blog has a complete guide: Garden Room Building Regs UK: What You Need to Know.

Ready to start your garden room?

Tell us about your project and we'll get you started. Fixed price, tailored to your project, confirmed in writing after your design meeting.

Estimate my build cost→ Generate my free renovation report→ Check my project feasibility→ See what value it’ll add→ Instant design quote→ Do I need planning permission?→

All free, all online, all in about a minute — no obligation and no card needed.

Book an intro call