A Garden Office and Shed Combined

A garden office and shed combined is one building with two rooms and two doors: an insulated office at one end and a store at the other. In Ireland a two-room building of 5 × 3 m to 6 × 4 m costs €13,390 to €17,950, put up. One building uses the 30 m² planning allowance better than an office and a separate shed, and it needs one base and one roof.

A garden office with storage, done as one building.

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€13,390 to €17,950two rooms, put up
One baseone roof, one delivery
30 m²the total, counted once

A dark timber garden building with a pitched metal roof and a covered end, on a lawn — A timber garden building with a covered end. The same idea: one roof over a room you work in and a space you store in.

Why combine them

The 30 m² total. Every garden building counts. A 12 m² office and a 6 m² store in one building is 18 m². Add an old 8 m² shed beside a new office and you are counting three walls of wasted gap as well.
One base, one roof, one delivery. The store adds floor area at a lower price than the office, because it needs no lining, glass or heat.
The garden. One tidy building at the end of it, and the old shed gone.

How to split it

Building	Office	Store	Suits
5 × 3 m	3 × 3 m	2 × 3 m	One desk, plus bikes and the lawnmower
6 × 3 m	4 × 3 m	2 × 3 m	Two desks, plus garden tools
6 × 4 m	4 × 4 m	2 × 4 m	An office and a small gym or workshop

Get the wall between them right

The dividing wall should be insulated like an outside wall, because the store is unheated. The store wants its own outside door, so nobody carries a strimmer through the office. Keep petrol, paint and anything damp on the store side, and put a vent in it.

An office with a gym or workshop

The second room can as easily hold a bench or a rowing machine. A workshop wants sockets at bench height and a hard floor. A gym wants a floor that takes dropped weights and a window that opens. Say what goes in it and how heavy, so the floor is built for it.

Two-room buildings, priced

What	Typical cost	What moves the price
A two-room building, office plus store	€13,390 to €17,950	5 × 3 m to 6 × 4 m, with a dividing wall and a second door
An office for two desks, 12 to 16 m²	€13,390 to €16,720	4 × 3 m to 4 × 4 m. The insulation, the doors and the glass
A 20 m² office, 5 × 4 m	€15,200 to €22,000	Triple glazing and thicker insulation sit at the top
A 24 to 25 m² office	€17,150 to €28,000	6 × 4 m or 5 × 5 m. How thick the insulation is
The base	€800 to €2,500	Ground screws, a slab or pads. A slope costs more

Our price guide for Ireland. Ask whether VAT is in the price. Many list prices leave it out. Ask what the price includes: the base, the cable from the house and the inside finish.