Garden Shed Planning Preparation Checklist

Write down whether this is a store you open and close or a shed you stand and work inside, because the two lead to very different sizes, openings and window arrangements.

Most disappointment with sheds traces back to this question never being asked, and a store being bought where a workspace was wanted.

Note whether anything you want to do in the shed needs a bench you can lean your weight on, and whether that bench would sit under a window or against a blank wall.

A bench takes depth along a whole wall, so deciding on one changes the plan far more than adding shelves does.

Decide whether the shed is quietly expected to absorb overflow from the house, such as boxes or spare furniture, and be honest about whether that suits an unheated outbuilding.

Household overflow arrives without being planned for and is what turns a working shed back into a store within a season.

Consider whether two people would ever be inside at once, and whether the arrangement you have in mind lets one pass behind the other without everything being moved.

Shared use is easy to allow for at the planning stage and almost impossible to add afterwards.

Record which garden jobs you currently do standing on the lawn or on a path, and ask yourself honestly whether you would really move them indoors once a shed exists.

Some jobs are done outside because they are messy or need space, and a shed does not change that.

Note whether you would want to shut the door behind you while working, and what that would mean for daylight and fresh air inside the shed.

Working with the door closed is a different experience from working with it propped open, and it drives the window and ventilation questions.

Stand in the chosen spot and look directly up, writing down what overhangs it, since anything above the shed will drop leaves, sap or debris onto the roof continually.

The roof is the part nobody looks at, and constant leaf fall on it is a common reason a shed roof fails sooner than expected.

Whether an overhanging branch should be left as it is or looked at further is a question for a qualified arborist and never something to judge from the ground.

Note which face of the shed would sit away from the sun for most of the day, since that side tends to stay damp longest and is usually where growth appears first.

The permanently shaded face is where deterioration starts, so knowing which one it is helps you decide how the shed is positioned and reached.

Ask a qualified arborist what the trees near the chosen position are likely to do over time, and record what they tell you before the position is settled.

Trees change size and shape, and a position that works today may sit under something quite different later.

Only a qualified arborist can advise on trees near a proposed structure, and any tree may also be subject to local protections you must confirm with the local authority.

Observe whether the spot is sheltered or exposed, and note what already collects in that corner of the garden when the weather is bad.

The corner where leaves and litter already gather tells you where the wind drops, which matters for both the roof and the door.

Ask where water shed from the shed roof would land, and whether that is a path you walk on, a planted bed or ground running towards a boundary.

Even a small roof concentrates a lot of water at one edge, and where it lands is easier to settle before the shed is standing.

Where roof water should discharge, and what that means for your ground and boundaries, must be established by a qualified professional and confirmed against local requirements.

Check whether the position sits beneath a washing line, an existing gutter, an overflow or anything else that regularly discharges onto the ground there.

Sheds are often placed in the one spot in the garden that is already receiving water from somewhere else.

Trace the route the shed or its panels would take from the road to the position, writing down the narrowest gate, the tightest turn and any step along the way.

Access commonly rules out the preferred form of shed, and it is far better to discover that before an order is placed.

Ask the supplier whether the shed arrives flat, in made-up panels or fully assembled, and how many people they expect to be needed to carry each part.

Panels can be heavy and awkward in a way photographs never convey, and the answer often changes which shed is realistic.

Decide who is assembling the shed and record it plainly, because the difference between a delivery and an installation is one of the most common misunderstandings.

Many sheds arrive as a delivery only, and the assumption that assembly was included is discovered on the doorstep.

What is delivery and what is installation should be set out in writing by the supplier before you order, rather than assumed from a listing.

Ask what the supplier expects to find on site on the day, and what happens if the ground is not ready when the delivery arrives.

A base that is not finished on time can turn a delivery into a stack of panels lying in the garden.

What preparation must be complete before delivery, and who confirms it, should be established with the supplier and the professional preparing the ground.

Note where packaging, pallets, wrapping and offcuts would be put on the day, and agree who is taking them away afterwards.

Waste removal is regularly left unstated and ends up sitting behind the new shed for a long time.

Consider what weather would do to a part-built shed, and ask the supplier what they expect if assembly cannot be finished in one visit.

Timber and boards left open to rain part-way through assembly can cause problems that show up much later.

Ask the supplier what finish the shed is supplied with and what they expect to be reapplied over time, then record the answer instead of assuming it needs nothing.

Assuming a shed is maintenance free is the assumption owners most often come to regret about an outdoor structure.

What finish or treatment a structure needs, and how and when it should be applied, must come from the product supplier and a qualified professional rather than general advice.

Check whether you could reach every face of the shed with a brush in your hand, including the back and the side nearest a fence or hedge.

A face you cannot reach is a face that never gets looked after, and it is usually the one that fails first.

Ask what the roof covering is and what the supplier expects to happen to it over time, since roof coverings generally age faster than the structure beneath them.

Owners plan for the shed and forget the roof covering, which is often the first thing needing attention.

Note whether the shed has gutters, where their water is taken, and who would clear them of the leaf fall you already observed above the position.

Small gutters block quickly, and a blocked one puts water straight down the wall it was meant to protect.

Write down who in the household will genuinely carry out this upkeep, or record that a landscaper or maintenance contractor would be asked to do it instead.

Naming the person is what turns an intention into something that happens, and it changes what kind of shed makes sense.

Ask the supplier what they expect underneath the shed floor in the way of air and clearance, and note whether the position would let you keep it clear.

The underside is the least visible part of a shed and one of the more common places problems begin.

What clearance and ventilation a shed floor needs above the ground should be established by the supplier and a qualified professional for your site.

Ask the supplier what the walls will accept in the way of fixings before planning any shelving or hooks, because not every wall construction takes a load.

Shelving is usually assumed to be simple, and finding out afterwards that the walls will not take it is a common setback.

What a shed wall can carry, and how anything should be fixed to it, must be established by the supplier and a qualified professional rather than tested by trial.

Sort your equipment into what has to hang and what can stand, and note the length of the longest hanging item against the wall you have in mind for it.

Hanging items need uninterrupted wall, which competes directly with a bench and with any window.

Consider whether the shelf depth you are imagining still lets you see what is at the back, or whether items would disappear behind other items.

Deep shelves in a shed hide things permanently, and the hidden items are then bought again.

Work out where a bench would sit relative to the door and any window, and whether standing at it would put your own shadow across the work.

Light comes from one or two openings in a shed, so the relationship between the bench and the opening decides whether it is pleasant to use.

Ask what the shed floor is designed to carry before planning to keep anything heavy in it, and write down what the supplier tells you.

Machinery and stacked material are heavier than a shed floor is often assumed to be able to take.

What load a shed floor or base can carry must be established by the supplier and a qualified professional, never estimated by the owner.

Decide whether you need light or power inside the shed, and ask a qualified electrician what taking a supply out to an outbuilding here would involve.

Deciding this before the shed is positioned is far simpler than adding a supply once everything is in place.

Any electrical supply to an outbuilding is work for a qualified electrician alone, who should also establish what applies locally before anything is agreed.

Accept that an unheated shed sits at close to the outside temperature, and note which of the jobs you want to do in it would be unpleasant in the cold.

Being realistic about this often reduces the shed people need, or changes where they want it.

Note how much daylight the shed would receive through its door and any window, and at what point in the afternoon the inside becomes too dark to work.

Sheds are darker inside than owners expect, and this is the main reason a working shed goes unused in winter.

Consider whether condensation forming on tools and surfaces would matter for the way you intend to use the shed, and ask the supplier what ventilation is provided.

Condensation can damage stored equipment more than rain reaching it, and it is rarely considered when a shed is chosen.

Ventilation requirements for a shed, and what may safely be kept inside one, should come from the supplier and a qualified professional.

Observe whether the path to the shed would be walkable in wet weather, since a shed reached across sodden grass is used far less often than expected.

The approach determines use in winter more than the shed itself does.

Note that outdoor structures often attract nesting or sheltering wildlife, and ask a qualified professional what to consider for your garden before work begins.

This is a question worth raising early, because it can affect when and how work is done.

Any question about wildlife in or under a structure belongs with a qualified ecologist or professional and with the relevant governing body, and never with self-directed action.

Decide whether anything you plan to keep in the shed would be affected by cold or damp, and record where those items will go instead.

Sorting contents by what tolerates outdoor conditions usually shortens the storage requirement before it is sized.

Before fixing a size or a position, find out from your local authority what applies to an outbuilding of this kind on a property like yours.

What is possible depends entirely on where the property is and what kind of property it is, so it can only be answered locally.

Only your local authority or a qualified adviser can establish what consent position applies to a shed or outbuilding on your property.

Ask the landscaper or supplier to set out what is included and what is not, with the ground preparation, the delivery, the assembly and the making good listed separately.

Ground preparation and assembly are the two items most often assumed to be included when they are not.

Check your title documents, lease or any covenant for wording about structures or outbuildings, and note anything you do not understand for an adviser to interpret.

Property specific restrictions are easy to miss and sit entirely apart from any local authority position.

Covenants, leases and title wording should be interpreted by a qualified conveyancer or solicitor rather than read at face value by the owner.

Ask what the base at this particular position would need to be, and record the answer rather than assuming an existing paved area or slab will serve.

The ground under the shed is where most long-term problems start, and it is the first thing a professional will want to discuss.

Base design, levelling and drainage for a shed must be established by a qualified professional for your specific ground conditions.

Consider what a neighbour would see from their windows or garden once the shed is up, and decide whether you would rather mention it beforehand.

Raising it before the shed appears is generally straightforward, whereas explaining it afterwards rarely is.

Agree in writing who is responsible if parts are damaged in transit or during assembly, and keep that record together with the order confirmation.

Damaged panels are common enough that having the position written down beforehand saves a difficult conversation.