Single Floor House Design: Planning a One-Storey Home

A one-storey home has an appeal that is easy to understand: no stairs, a direct relationship with the garden, and a plan that can be read at a glance. Yet single floor house design is harder to do well than it looks. Without the option of stacking rooms, every square metre is laid out on the ground, and the plan, roof and site must work together to deliver light, air and privacy.

This guide covers the main plan types, how to zone a single-level home, the role the roof plays, structural and cost considerations, and how the approach adapts to a hot, wet climate such as Singapore’s. It is written to help owners brief a designer and evaluate options, not to replace site-specific advice.

Why choose a single-storey house

The strongest argument is accessibility. A home without level changes suits young children, older residents and anyone with limited mobility, and it can be adapted for ageing in place with little difficulty. The principles of universal design are far easier to apply when everything sits on one level.

There are construction advantages too. Without upper floors, the structure carries lighter loads, scaffolding and working at height are reduced, and maintenance of roofs and gutters is simpler. The trade-off is land: a single-storey house of a given floor area needs a larger footprint, which in a dense city often makes it a choice reserved for generous plots or for secondary buildings.

Plan types in single floor house design

Single-level homes tend to follow a small number of plan forms, each with distinct strengths.

Linear or bar plan: rooms arranged in a single line, often along a corridor or veranda. Every room can have cross ventilation and garden views, but circulation can become long.
L-shaped plan: two wings meet at a corner, creating a sheltered outdoor space between them and a natural separation of living and sleeping areas.
U-shaped and courtyard plans: rooms wrap around a central open space, bringing daylight and air into the heart of the house. Our guide to courtyard design explores this type in depth.
Compact square plan: the most efficient enclosure for a given area, with short services runs, but rooms in the centre can be dark without skylights or clerestories.

The right choice depends on plot shape, orientation and how the household wants to live. A narrow plot pushes towards a linear plan; a wide one invites a courtyard.

Zoning: public, private and service

In a multi-storey house, floors separate activities naturally. On a single level, separation must be achieved in plan. Most successful designs divide the house into three zones: public spaces such as living, dining and kitchen; private spaces such as bedrooms and bathrooms; and service spaces such as laundry, storage, plant and the household shelter or store where applicable.

The public zone usually sits nearest the entrance and opens to the main garden. Bedrooms are grouped in a quieter wing, ideally with the master suite separated from children’s rooms. Service spaces form a buffer, often along the hotter west side or towards the road, where they shield living areas from noise and sun. A clear zoning diagram at the earliest stage prevents the common problem of bedrooms opening directly off the living room.

The roof does most of the work

On a one-storey house, the roof is the dominant element, both visually and environmentally. It is the largest surface exposed to the sun, so its form and insulation strongly affect indoor temperatures. A pitched roof with a ventilated void and generous eaves sheds tropical rain quickly and shades the walls. A flat roof can host a garden or solar panels but needs careful waterproofing and insulation to avoid heat build-up and leaks.

The roof also controls daylight. Because deep single-level plans can leave central rooms far from external walls, designers use clerestory windows, light wells and skylights to bring light in from above. Each must be detailed to keep out rain and limit heat, which is why shaded clerestories often outperform horizontal skylights in the tropics. Our article on passive cooling explains how roof ventilation and stack effect can draw hot air out of the house.

Structure and foundations

Structurally, a single-storey house is modest, but not trivial. Loads from the roof travel through walls or columns to the foundations, and because the footprint is spread out, the foundations cover more ground than those of a compact two-storey house. On firm soil, simple pad or strip footings may be adequate; on soft or variable ground, which is common in parts of Singapore, a raft or piled foundation may be needed to control settlement across the wide footprint.

Long spans in open-plan living areas need either deeper beams or intermediate supports. Exposed timber or steel roof structures can express this span honestly, while concrete flat roofs may require downstand beams that affect ceiling lines. Deciding early which spaces need column-free spans, and which can accept a column or wall, keeps both cost and design intent under control. A structural engineer can advise on these trade-offs while the plan is still flexible.

Cost and land considerations

It is a common assumption that a single-storey house is cheaper than a two-storey one of the same floor area. That is not always true. The single-storey version needs a larger roof and larger foundations, both of which are expensive elements per square metre, while saving on stairs, upper slabs and scaffolding. The balance depends on ground conditions, roof type and finishes, and it should be tested with a cost estimate rather than assumed.

Land value usually decides the matter in Singapore. Where planning controls allow two or three storeys, building only one leaves potential floor area unused. A single floor house design therefore tends to appear on large plots, in specific estates, or as a deliberate lifestyle choice by owners who value accessibility and garden connection over maximum floor area.

Designing for the tropics

A one-level house in a hot, humid climate benefits from the strategies of traditional tropical dwellings: raised floors or well-drained platforms, wide verandas, deep eaves, cross ventilation and shaded outdoor rooms. Orienting the long sides north and south reduces low-angle sun on the walls, and planting can cool the immediate surroundings.

Many of these ideas are explored further in our guides to small house design and tropical architecture. The common thread is that a well-designed single-level house relies on form and orientation, rather than mechanical cooling alone, to stay comfortable.

Frequently asked questions

Is a single-storey house cheaper to build than a two-storey house?

Not necessarily, because a single-storey house of the same floor area needs a larger roof and more foundation, which can offset the savings from omitting stairs and upper floors; the answer depends on ground conditions, roof type and specification.

What is the best layout for a one-storey home?

There is no single best layout, but L-shaped, U-shaped and courtyard plans work well because they separate living and sleeping zones and bring light and air into the centre of the house, while linear plans suit narrow plots.

How do you get natural light into the middle of a single-level house?

Designers use courtyards, light wells, clerestory windows and skylights to bring daylight into deep plans, and in tropical climates shaded clerestories are often preferred because they admit light with less heat and glare.

Can I add a second storey to a single-storey house later?

It is possible only if the existing foundations, columns and walls can carry the extra load or can be strengthened, and planning permission is also required, so a structural assessment by a Professional Engineer should come first.

Planning a single-level home or extending one? Talk to our consultancy about the structure, or get in touch.