Last updated 11 July 2026
5 rules interior designers use to make a small terrace feel twice as big
A terrace feels small for reasons that usually have nothing to do with its size. 5 working rules for outdoor spaces, with the measurements that go with them. Four of them you can test this weekend without spending anything.
Words by
Nina Falk
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Published on: July 4th, 2026
Two terraces of exactly 20 square meters can feel completely different.
One feels generous. You step outside and you want to stay. The other feels like a corridor with plants in it, and you go back indoors without quite deciding to.
The difference is almost never the square meters. It is a short list of decisions about height, spacing, color and where the eye stops.
None of them require building work. Here is the list, with the measurements.
Step 1:
Divide it into two zones, even if you only have twelve square meters
This is the rule people resist most, and it is the one that changes the space most.
A terrace with a single zone looks like one small room. A terrace with two zones looks like a space you move through, and a space you move through feels longer.
Give each zone roughly 180 × 180 cm and it will work as a zone. Below that it just looks like a gap.
Draw the line between them with a rug, a change in floor covering, or a low planter. Never with a piece of furniture placed across the space.
A sofa standing sideways in the middle of a terrace does not create two rooms. It creates one blocked room.
Step 2:
Protect 60 cm of clear walking width, and give up furniture to keep it
Measure the gap between your furniture and the nearest wall, railing or planter. If it is under 60 cm, people turn sideways to pass.
A space you turn sideways in is remembered as small, whatever the tape measure says. No amount of styling corrects that feeling.
If protecting the 60 cm means one less chair, lose the chair. You will gain more from the walking width than the chair was ever giving you.
Step 3:
Pull the seating 15 to 20 cm away from the wall
This one sounds wrong, because it takes usable space away. It works anyway.
Furniture pushed flat against a wall makes the space look like a corridor. A visible gap behind the seating makes it look like a room with air in it.
Fifteen to twenty centimeters is enough. You are not creating a walkway. You are creating a shadow line that tells the eye the wall and the furniture are two separate things.
Step 4:
Keep everything low. Seat height under 40 cm, nothing above 70 cm
This is the most reliable rule on the list and the one fewest people use.
The eye does not measure a space by its floor area. It measures the empty volume above the furniture.
Low seating leaves more visible wall and more visible sky, and both of those look like space. Tall-backed dining chairs and high planters take up the open volume that was making the terrace feel large.
A tall plant is fine, because you can see through it. A tall solid back is not.
Step 5:
Three colors, and keep the cushions close in tone to the floor
Choose one color for the large soft surfaces, one for the hard surfaces, and one accent that appears exactly three times.
The accent rule matters. Used once it looks accidental, used everywhere it looks busy, used three times it looks decided.
The second half of this rule is what changes the size of the space. High contrast cuts the floor into pieces, and each piece then looks small.
A beige or soft gray cushion against a gray stone terrace looks like one continuous surface. Put a strong color on the same terrace and the floor is suddenly divided into sections around it.
The terrace has not changed. Your reading of it has.
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The problem every one of these six rules eventually runs into
Read the list again and a pattern appears. Zoning, the low profile and the single large shape all depend on one thing: being able to decide what shape your seating is.
Ordinary outdoor furniture does not let you decide. A four-seat sofa is a four-seat sofa forever, in one shape, at one height.
But a terrace is not one thing. Twice a year you need seating for eight. Every other evening you need seating for two, and the eight-seat arrangement is what makes the space feel crowded for the other 360 days.
This is why designers working on small outdoor spaces reach for modular systems. A shape you can change is worth more, on a small terrace, than a shape that is perfect once.
TROISPOMMES HOME is the Danish brand that most of this advice ends up pointing toward, for reasons that are practical rather than aesthetic.
Base frames lift each piece 4 cm off the terrace. That keeps the underside dry and gives the furniture a shadow line, so it sits lightly on the floor instead of sinking into it.
The pieces are bought individually and combined, so you build the shape your terrace needs instead of the shape somebody else chose.
The range is lounge seating rather than dining seating, which puts it at the low end of rule 4 by design. Check the seat height on the product page against your own floor before ordering.
The replacement covers come in four colors: Beige, Melange Grey, Earth Brown and Dark Grey. That is a deliberately narrow palette, and it works with the tone-matching rule in rule 5 rather than against it.
And there is one detail that solves a design problem and a durability problem at the same time. Base frames lift each piece 4 cm off the terrace.
Visually, that 4 cm gap creates a shadow line under the furniture, so the piece looks like it sits lightly on the floor. Practically, it keeps the underside dry and protected from ground moisture.
It is the same idea as pulling the sofa away from the wall, turned on its side.
What this looks like on a terrace under 20 square meters
On a narrow balcony, one continuous run along the longest wall, pulled 15 cm forward, with the walking width protected on the other side.
On a square terrace, an L along two walls. That uses the corner most small outdoor spaces are built around and leaves the center of the floor visible.
On a roof terrace, seating low and away from the railing, so the view does the work.
In all three cases the arrangement comes apart in ten minutes when eight people arrive, and goes back the next morning.
“TroisPommes won the 2026 IF Design Award out of 10.000 submissions from 68 countries selected by 129 international design experts”
You do not have to solve the whole terrace in one purchase
Most people who furnish a terrace this way do not buy everything at once, and there is no reason to.
A single corner piece or sofa is often enough to fix the worst part of a space. What you add next summer joins what you bought this summer.
Individual pieces start at €317. One customer asked the question directly before ordering: would the piece she planned to add later be the same color as the two she was ordering that day?
It is a reasonable thing to worry about. Check the exact color name on the piece you buy first, and order the same name the second time.
The fabric is 100% olefin-based, Oeko-Tex® certified and SGS tested, and it is water, frost, stain, pet and UV resistant. It stays outside through winter, and every cover washes at 30°C.
In 2026 the design won an iF Design Award, chosen from 10,000 submissions from 68 countries by 129 international design experts.
Questions?
"Where can I see it in real life before I buy?"
This is the most common question the brand receives, and the honest answer is that the fabric comes to you instead. A 4-pack of samples costs €20, so you can check the true colors in your own light, on your own floor, against your own wall.
"Do the base frames have to be bought separately?"
Yes, they are listed separately so you only buy what your arrangement needs, and they start at €119 per piece. They are what lifts the furniture 4 cm off the ground and keeps the underside dry.
"Can I really leave it outside all winter?"
Yes. The fabric is frost resistant and water-repellent year-round, and protection covers are included with the current offer. There is no oiling and no winter storage.
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Try the free four first. Then look at the one thing you cannot move your way out of.
Four of the six rules cost nothing. Move the seating forward from the wall. Protect the walking width. Take one piece away. Keep everything low. You will see most of the effect the same afternoon. The one thing you cannot fix by moving furniture is furniture that only comes in one shape.
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