Balcony and Terrace Discussion Preparation Checklist

Write down what lies directly beneath the area, whether that is a habitable room, a garage, a passage, a shop or open air, and note who occupies it.

What sits underneath shapes almost every part of the discussion, from waterproofing to who has to be consulted before anything happens.

Note whether the area already exists as a flat roof, an unused balcony or a canopy, or whether it would be built new, and record how it is used at present.

Converting an existing surface and building something new are two entirely different conversations that owners often start as though they were one.

Record how you would get onto it, whether through an existing door, a window that would become a door, or a new opening in a wall, and photograph that wall.

The way onto a terrace is usually the part that turns a simple idea into a wider alteration, and it is the part left until last.

Note whether the area appears to project out from the wall, to sit on walls or posts beneath, or to rest on the roof of something below, without concluding anything.

How something appears to be held up is a useful description to hand over, provided it is offered as a description rather than as a conclusion.

How a balcony is actually supported can only be established by a qualified engineer, often only after opening up parts of the construction.

Describe roughly how much of the roof would be used by reference to the rooms below it, rather than by estimating a figure you cannot really check.

A description tied to the rooms underneath is checkable by anyone who visits and stays accurate however many times it is repeated.

Photograph the area from ground level on every side and from any window that overlooks it, dated, including a view showing it in relation to neighbouring windows.

Photographs from above and from the street answer questions about overlooking and arrangement long before anybody has to visit.

Photograph the underside in good light from several angles, recording any staining, rust marks, cracking, missing render or exposed material you can see.

The underside changes visibly long before the surface does, and photographs taken now become the baseline for everything afterwards.

Note any damp patch, staining or blistering on the ceiling of the room below, when it appears and whether it follows particular weather.

Whether a stain appears in driving rain or in still weather is exactly the sort of detail an owner can supply and a visitor cannot.

Record whether fragments of render, concrete or mortar have appeared on the ground beneath, keep them, and photograph where they landed.

Do not tap, prod or pull at the underside to see what comes away; report what has fallen and let a qualified engineer decide what it means.

Note any timber bearers, brackets or fixings visible beneath a deck, how they meet the wall of the building, and photograph that junction closely.

Where a deck meets the wall is the junction that matters most and the one hidden by the finished surface above it.

Note whether any joint has opened where the balcony meets the wall, whether the gap has been filled before, and whether the filling has cracked again.

Repeated filling of the same joint is a quiet record of behaviour over time, and it usually exists only in the memory of the owner.

Record when anybody last looked at the balcony properly, who that was and what they said, keeping their wording rather than your summary of it.

Earlier comments are frequently narrower than they are remembered as being, and the original wording is what a professional will want.

List what you intend to lay on the surface, such as paving on supports, decking, tiles or gravel, and note whether it would cover the whole area.

The surface finish is often chosen for appearance long before anybody considers what it adds, and it covers everything underneath it too.

Record any planters or beds you have in mind, whether they would be permanent, how deep the soil would be in rough terms and whether they would be watered regularly.

Soil that is kept watered behaves very differently from the same planter seen dry in a showroom, and owners rarely mention the watering.

Note whether the terrace would be used by a few people or would be where everyone stands when you have visitors, and where they would naturally congregate.

People gather at the edge with the view, which is usually the part of the arrangement that most warrants a professional opinion.

Record anything substantial you are considering, such as a hot tub, a water feature, a store or an outdoor kitchen, even if it is only an idea at this stage.

Nothing about a hot tub, planter or store should be assumed to suit a raised surface; put every heavy item to a qualified engineer before it is ordered.

Note any screen, pergola, canopy or parasol you would want fixed, and where it would stand, since anything upright catches the wind in an exposed position.

Wind is the load owners forget entirely, and a terrace high on a building is a good deal more exposed than the garden below it.

Note what would end up stored there permanently, such as bicycles, tools or firewood, since what is left outside tends to accumulate quietly.

Storage that arrives gradually is never in the original description, and it changes what is standing on the surface all year round.

Watch during heavy rain and photograph where water stands on the surface, how deep it looks against something visible, and how long it takes to clear.

Water standing in the same place each time is a straightforward observation to record and one that nobody visiting in dry weather will see.

Find where water leaves the surface, note whether the outlet is clear or blocked with leaves and grit, and record who has been clearing it until now.

Outlets on flat roofs are cleared by nobody in particular for years at a time, which is how most of the trouble on terraces begins.

Trace where the water goes after it leaves, whether into a hopper, a downpipe, over the edge onto a path or against a wall, and photograph the discharge point.

Water discharging onto a path or against a wall is easy to see and easy to ignore until it is causing something else entirely.

Note how the surface meets the door, whether there is a step up or down, and whether water ever sits close to the threshold in prolonged rain.

The threshold is where the two hardest requirements meet, since owners want a flat step out and water wants to be kept away from the door.

Note what happens on the surface when an outlet does block, where the water goes instead and whether there is any second route for it.

What arrangements are appropriate for water leaving a terrace is for qualified professionals to establish; do not alter or add outlets yourself.

Ask what waterproofing layer exists or is proposed, how it would be reached in future if a leak appeared, and what would have to be lifted to get at it.

Paving laid over a waterproofing layer decides how difficult any future repair will be, and that is settled at design stage or not at all.

Record what stands at the edge at present, what it appears to be fixed to and whether anything about it moves when leant on, without testing it deliberately.

How edge protection is fixed matters as much as what it is made of, and the fixings are usually the part hidden by the finish.

Never test edge protection by leaning or pushing; report anything that feels loose to a qualified professional and keep people away from it meanwhile.

Note any gap, horizontal rail, planter or piece of furniture at the edge that a child could climb, and photograph the edge from the terrace side.

Furniture pushed to the edge changes the situation entirely, and it is placed there long after any design has been finalised.

Write down who would use the terrace, including small children, older visitors and pets, and how often it would be used unsupervised.

Who uses a space is information only the household holds, and it belongs in the discussion with a professional from the very beginning.

Note the step up or down at the door in both directions, whether anyone in the household would find it difficult, and whether it would be used at night.

Thresholds are negotiated dozens of times a day, and difficulty using one is the sort of thing that never appears on a drawing.

Ask a qualified professional what edge protection is required in this specific situation, and confirm locally what applies rather than copying something seen elsewhere.

Requirements for edge protection vary by location, height and use; nothing here states any height, gap or arrangement as being correct.

Ask whether the terrace or the route to it has any part to play in getting out of the building in an emergency, and who is able to answer that where you live.

Questions about escape and fire safety must go to a qualified professional and the relevant local authority; never settle them by assumption.

Check what the title or lease says about the roof, the balcony and the space in question, and note whether it appears to be yours, shared or held by somebody else.

Owners are often surprised to find that a surface outside their own door is not theirs to alter, and that is better discovered now.

Interpretation of a lease or title is a legal question; ask a qualified professional rather than relying on your own reading of the wording.

Ask any freeholder or management company what they expect to be told and at what stage, and record their answer in the words they used.

Getting the sequence right with a building owner avoids proposals being rejected on procedure rather than on their merits.

Note whether the roof also serves as access for maintenance, or carries aerials, flues, vents or equipment belonging to the building or to other occupiers.

A flat roof often has several quiet jobs already, and taking it over as a terrace interferes with every one of them.

Record which neighbouring windows look onto the space and which would be looked into from it, then confirm locally what applies to changes of this kind.

Overlooking is treated differently from one area to the next; put the question to the relevant local authority rather than working from what a neighbour did.

Think about how conversation and music would carry from an outdoor space above other homes, and note which neighbouring rooms face it directly.

Noise from a raised outdoor space travels much further than from a garden, and neighbours notice it long before anyone else does.

Take dated photographs of the adjoining roofs, parapets and walls that your terrace would look over, working only from windows and doors on your own side.

Questions about overlooking and about who owns which parapet arrive later, and photographs taken from your own windows now answer them without argument.

Ask how the finished surface would be lifted to reach whatever lies beneath it, and whether that can be done in one area or only by taking up the lot.

Whether a surface lifts in sections decides how a future repair goes, and it is a straightforward question to ask while the design is being drawn.

Ask who would clear outlets, gutters and gullies in future, how they would reach them and what they would stand on while doing it.

Working at the edge of a raised surface is not owner work; ask a qualified professional how future attention would be carried out safely.

Ask what would give the first sign that something needed attention, where that sign would appear and who you should speak to when it does.

Knowing what to look for is the most useful thing an owner can be given, and it is a question almost nobody remembers to ask.

Ask what documents you would hold at the end, what each covers and what conditions attach to them, and keep the originals rather than copies.

Ask the issuing organisation what any document actually covers; nothing issued at the end of work should be assumed to cover everything.

In a shared building, agree who is responsible for attending to the surface afterwards, and record that agreement in writing rather than in conversation.

Responsibility for a shared surface is remembered differently by each side once something needs doing, which is usually years later.

Decide where the drawings, photographs, correspondence and documents about the terrace will be kept, and note that a buyer will ask for all of it.

Terraces over habitable rooms attract careful questions at sale, and a complete file answers them without anybody having to rely on memory.