Reading a Luxembourg floor plan when the photographs look better than the flat

A floor plan is the only document in a listing that cannot be shot on a wide-angle lens. It is also the one most people skim. Ten minutes with a plan eliminates more unsuitable apartments than an afternoon of viewings.

Start with the surface figure and what it includes

Luxembourg listings quote surface in several ways, and the difference is material. You will encounter total surface, habitable surface, and separately quoted terraces, balconies, cellars and garage lots. A property advertised at 110 m² that includes a 15 m² terrace and a 10 m² cave is an 85 m² apartment.

Check the plan against the headline number. If the rooms drawn do not plausibly sum to the figure quoted, the figure includes something outside the front door. This is convention rather than deception, but it destroys comparability between two listings unless you normalise them yourself.

Then look at what proportion of the habitable surface is circulation. A long internal corridor serving four rooms can consume eight or nine square metres that appear in the total and are of no use to anyone. Two apartments of identical surface, one with a central hall and one with rooms opening off a living space, are not the same apartment.

The measurements that decide whether furniture fits

Take the scale bar and check four things. These are the ones that produce expensive surprises after a lease is signed.

• Longest uninterrupted wall in each bedroom. Unfurnished Luxembourg lettings frequently have no wardrobes at all. A bedroom with a door, a window and a radiator may have no wall long enough to take a standard 2-metre wardrobe, which means buying something bespoke or losing floor area.
• Living room wall for a sofa. A three-seat sofa needs roughly 2.2 metres of clear wall plus clearance at each end. Count the doors opening into the room; each one removes a wall.
• Dining clearance. A table needs about a metre behind each chair to be usable. An open-plan kitchen and dining area drawn at 4 metres wide will not comfortably take a six-seat table and a circulation route at the same time.
• Bed wall in the main bedroom. A 160 cm bed with bedside tables needs about 2.4 metres, plus circulation on both sides if two people use it.

Door swings, which are drawn and never read

Every door on a floor plan is drawn with its arc. Those arcs tell you where furniture cannot go, and they are the most reliable early warning of an awkward room.

Look for doors that swing into the useful part of a room rather than against a wall, two doors whose arcs overlap, and bathroom doors that open onto the only place a washing machine could stand. In converted Luxembourg townhouses, which make up a large share of the stock in Limpertsberg, Belair and the Gare district, rooms were subdivided at some point and the door positions are frequently the evidence.

Check also whether the entrance door opens directly into the living room. In a country where the heating season runs from October to April, an apartment with no entrance hall loses warmth every time someone arrives and has nowhere for coats and wet boots.

What the plan reveals about the building

Two features on a plan carry information beyond your own apartment.

Wall thickness. Drawn thickness distinguishes structural walls from partitions. A bedroom separated from a neighbouring apartment by a thin partition is an acoustic question, and in older converted stock with timber floors and no acoustic separation it is the single most common cause of neighbour disputes.

Service runs. Where the bathroom and kitchen sit relative to each other and to the neighbouring units tells you where the risers are. A bedroom sharing a wall with the building's water riser or backing onto the lift shaft will hear both. Stand in that room at the viewing and stay silent for thirty seconds.

Where the plan is silent

A floor plan will not tell you the ceiling height, and Luxembourg's stock varies enormously: a nineteenth-century townhouse conversion may have three metres, a 1970s block considerably less, and a converted attic something that slopes. Ask, because ceiling height changes how a given floor area feels more than almost any other variable.

It will also not tell you the floor level, whether there is a lift, or where the cave is. All three matter. Ask for the cave to be shown at the viewing rather than described, because size varies widely and it is where bicycles, suitcases and winter tyres have to live.

Finally, a plan says nothing about what you may do to the space. Any alteration touching a load-bearing wall or the building's common systems needs the landlord's consent and frequently the co-ownership's, so a plan showing an obvious improvement is not an invitation to make it.

Building a comparison you can trust

After four viewings memory reliably corrupts, and the apartment with the best light becomes the one with the best kitchen. Record the same fields for every property on the same evening: habitable surface excluding terraces and cellar, rent excluding charges, realistic charges from the last reconciliation, energy class, floor and lift, orientation of the main rooms, longest bedroom wall, cave size, parking, and minutes on foot to the nearest tram or bus stop.

Public transport is free nationwide, so the transport column is time and frequency, never cost. Add one subjective field and only one: whether you would be content there on a wet Sunday in November.

Three questions we are asked

Are Luxembourg floor plans reliably to scale? Usually, but check for a scale bar or dimensions. A plan with neither is a diagram, and should be treated as an indication of layout rather than as a measurement you can furnish from.

Should I trust a 3D visualisation? Only for layout. Rendered furniture in a visualisation is routinely drawn undersized, which is why rooms in a render look more generous than the same rooms in a photograph.

Can I ask for the plan if the listing does not show one? Yes, and it is a reasonable request. If none exists, take your own measurements at the viewing and sketch it. Ten minutes with a tape measure is a better use of a viewing slot than a second look at the kitchen.

Turning the plan into a viewing agenda

The point of reading a plan carefully is that it converts a twenty-minute viewing from a general impression into a short list of things to verify. Arrive with three or four marked questions rather than a vague intention to look around.

Typical items: confirm the ceiling height, which no plan shows; check where the radiators actually are, because they are often omitted and they govern where furniture can stand; check the position of sockets in the living room and bedrooms; measure the lift car and the narrowest point of the stairwell, which decide what furniture can physically arrive; and stand silently for thirty seconds in the bedroom nearest the lift shaft or the water riser.

Two further checks belong outside the apartment. Ask to see the cave rather than be told it exists, and measure it, because size varies enormously and it is where bicycles, suitcases and winter tyres have to live. And walk from the building entrance to the nearest tram or bus stop and time it yourself. Public transport in Luxembourg is free nationwide, so the only variables are minutes and frequency, and the city's plateau-and-valley topography means a route that looks short on a map can involve a serious climb.

Record the same fields for every property the same evening, and note the availability date. After four viewings, memory is not a reliable comparison tool.