---
title: "Add an Ottoman to a Floor Sofa: Three-Seater or L-Shape"
url: "https://cushionguide.com/answers/extend-floor-sofa-ottoman-backrest-three-seater/"
section: "The Cutting Table"
author: "Hana Lindqvist, The Quiet Geometer of Seattle"
author_url: "https://cushionguide.com/masters/hana/"
published: "2026-09-09"
updated: "2026-09-09"
keywords: "add ottoman to floor sofa, extend floor sofa, floor sofa three-seater, modular floor sofa add-on ottoman, turn floor sofa into L-shape"
---

# Can I add an ottoman and backrest to extend my floor sofa?

*A floor sofa grows the way a room does. One square at a time.*

Also asked as: Would I need an additional bracket?; Does the ottoman come with the straight back?

> **The quick answer:** Yes, you can add an ottoman to a floor sofa to make it longer or turn it into an L. The add-on ottoman is 39 x 39 in (99 x 99 cm) and 13.5 in (34 cm) high, comes filled, and ships with a straight backrest and one metal bar, sewn to match. Add a straight backrest for a three-seater, or a corner backrest for an L.

![Two cream velvet floor sofas set in an L-shape, one with rust ends and one with mustard, around a shaggy rug and oak table](https://cushionguide.com/media/modular-floor-sofas/rust-mustard-floor-sofas-l-shape-corner-lounge-1600.webp "Two floor sofas meet in the corner to make an L-shaped lounge, one edged in rust and one in mustard.")

## Key facts

- The add-on ottoman is 39 x 39 in (99 x 99 cm) and 13.5 in (34 cm) high, filled.
- It ships with a straight backrest and one metal bar.
- Sofa with ottoman plus one straight backrest makes a three-seater.
- An ottoman plus a corner backrest turns a straight sofa into an L.
- Corner chairs (an ottoman with a corner back) are sold without the middle seat.
- For the corner-set price you can take one sofa, two ottomans and two straight backrests instead.
- Modules ordered later are sewn to match the main sofa.
- One ottoman extends the sofa to about 118 in (300 cm); a closed corner runs about 79 x 118 in (200 x 300 cm).

## Four ways to grow the same sofa

| You want | Order | Comes with |
|---|---|---|
| A three-seater | Sofa with ottoman + 1 straight backrest | The ottoman's own metal bar |
| An L from a straight sofa | Ottoman + corner backrest | One metal bar |
| Two corner chairs, no middle seat | Ottoman with corner back, twice | One bar each; each folds out |
| A looser layout | The corner listing, sent as 1 sofa + 2 ottomans + 2 straight backrests | Same price as the corner set |

## Buy the floor sofa base now, add ottomans later

The workshop's advice is patient. Buy the base first. Live with it. Add modules when the room tells you what it needs.

A module ordered later is sewn to match the main sofa, in the same color. Place a standard order and write the extra backrests you need in the preferences box. Each ottoman arrives filled, with its backrest and its bar, so nothing is missing when it lands.

The [modular floor sofa](https://cushionguide.com/cushions/modular-floor-sofas/) pages show the pieces, and the [layouts Pattern](https://cushionguide.com/guides/modular-floor-sofa-layouts/) draws the common shapes. For a small room, the [small apartment layouts](https://cushionguide.com/concepts/small-apartment-floor-sofa-layouts/) are worth a look. How long is your longest empty wall?

Leave a hand's width of floor.
The sofa can wait.
The room will say when.

## Extending a sofa you already own

1. **Order in the same color**: Choose the add-on pieces as a standard order.
2. **Name the backrests**: Write straight or corner, and how many, in the preferences box.
3. **One bar per backrest**: Each new backrest gets its own [support bar](https://cushionguide.com/guides/floor-sofa-support-bars-assembly/).

> **Tailor's margin:** An add-on floor sofa ottoman is 39 x 39 in and 13.5 in high, and it ships with its own straight backrest and metal bar.

> Add one ottoman and one straight backrest to a floor sofa and it becomes a three-seater; swap in a corner backrest and it becomes an L.
>
> — Hana

## Buyer questions

**A common question:** Can I make my sofa longer with an ottoman and a straight backrest? Do I need another bracket?

**The workshop's answer:** Yes. The add-on ottoman ships with a straight backrest and one metal bar to connect it, and all pieces are sewn to match the main sofa. Place a standard order in the same color and write which extra backrests you need in the preferences box.

**A common question:** Can I add ottoman modules to make the sofa bigger or turn it into an L?

**The workshop's answer:** Yes. Modules are sold separately. The ottoman is 39 x 39 in and 13.5 in high and comes filled. Adding it with a corner backrest turns the straight sofa into an L. The workshop suggests buying the base first and adding modules later.

**A common question:** Can I put a backrest on just one side of the ottoman for a three-seater?

**The workshop's answer:** Yes. Add 'sofa with ottoman' and one 'straight backrest' to the cart, and it becomes a three-seater.

**A common question:** Can I buy just the corner chairs, without the middle seat?

**The workshop's answer:** Yes. An ottoman with a corner back can be bought alone or as a pair. Each one folds out and comes with one metal bar, and a second one ordered later will match.

**A common question:** Could I get one sofa, two separate ottomans and two straight backrests instead of the corner set?

**The workshop's answer:** Yes, for the same price as the corner sofa. Order the corner listing and the workshop sends the sofa, two ottomans and two straight backrests.

## Questions buyers ask next

### Does the floor sofa price include the backrest and armrests?

Yes. It is the full set: one seat cushion, a matching-length backrest 16 in (40 cm) tall and two round armrest bolsters, with filling. You only choose the size and the color.

### Will an ottoman I order months later match my sofa?

Yes. Modules are sewn to match the main sofa, and a corner chair ordered later matches the first one. Order in the same color and note the backrests you need in the preferences box.

### Can the L side sit on the left instead of the right?

Yes. The sectional is fully modular with no fixed direction, so the chaise, open end or ottoman can go on either side. Move the L-shaped backrest to the other corner.

## Related at the atelier

- [Can I buy extra pieces later to turn my floor sofa into an L or a corner sofa?](https://cushionguide.com/answers/add-pieces-floor-sofa-l-shape-upgrade/): Yes, modular floor sofa pieces are sold one by one, so you can add base cushions and straight or L-shaped backrests later to make an L or a corner sofa.
- [What size floor sofa do I need for three people, and which size is in the photos?](https://cushionguide.com/answers/floor-sofa-size-guide-three-seater/): For three people, choose the 28 x 64 in (70 x 160 cm) floor sofa, which comes with the seat, a matching backrest and two round armrest bolsters.
- [How big is the floor sofa ottoman, and does it fold open?](https://cushionguide.com/answers/floor-sofa-ottoman-size-foldable/): The floor sofa ottoman is 39 x 39 in (about 100 x 100 cm), made as one connected, foldable piece whose two stacked layers open flat into a longer rectangle, like two pillows side by side.
- [Modular Floor Sofa in Cream and Camel: Plains and Texture](https://cushionguide.com/readings/camel-cream-floor-sofa-bright-nordic-flat/): A modular floor sofa can look layered without any printed pattern: pair two plain velvets, cream for the seats and camel for the ends, and let a jute rug, oak grain and a glazed vase supply the…
- [Modular Floor Sofa in Sage and Cream Velvet, Among Plants](https://cushionguide.com/readings/sage-velvet-floor-sofa-botanical-plant-room/): A sage and cream velvet modular floor sofa suits a plant-filled room because the sage ends read as one more leaf tone while the cream seat stays the palest, most restful spot.
- [Modular Floor Sofa in Navy and Cream Velvet: Foam Notes](https://cushionguide.com/readings/navy-velvet-floor-sofa-sunlit-minimal-room/): A modular floor sofa is foam cushions under zippered covers, and the foam decides how it sits.
- [Corner floor sofa layouts: L-shapes, U-shapes, open or closed corners, straight runs](https://cushionguide.com/guides/modular-floor-sofa-layouts/)
- [Can you sleep on a floor sofa? Bed size, firmness and sheets](https://cushionguide.com/guides/floor-sofa-bed-size-firmness/)

*— Hana*

---

Written by Hana Lindqvist (https://cushionguide.com/masters/hana/) for CushionGuide (https://cushionguide.com/about/). The site explains made-to-measure cushions and the partner workshop makes them; measurements are in inches first. This Markdown mirrors the page at https://cushionguide.com/answers/extend-floor-sofa-ottoman-backrest-three-seater/