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Company profile · Pecasa Garden Rooms

Pecasa Garden Rooms

Pecasa Garden Rooms design and build contemporary SIPs garden rooms and annexes across North London, Hertfordshire and Buckinghamshire, with most projects starting on an online configurator.


Published 26 January 2026 · 3 minute read · Written by The Garden Room & Annexe Guide

Example of a Pecasa Garden Room
Pecasa Garden Rooms  contemporary garden room in black vertical cladding

We’ve been exploring the work of Pecasa Garden Rooms, a specialist garden room and annexe company working across North London, Hertfordshire, and Buckinghamshire. As the project images show, their buildings lean towards a contemporary aesthetic, with clean lines that can be tailored around the intended use of the space, the setting of the garden, and individual tastes.

Pecasa design and build bespoke garden rooms and garden annexes, creating spaces that range from home offices and gyms through to self-contained living accommodation with kitchens and bathrooms. Much of the structural work is carried out off-site in their local workshops, which helps keep the on-site phase relatively short and controlled. This approach reduces disruption at home, with typical installations completed in around two weeks or less, depending on the specification and site conditions.

Example of a Pecasa Garden Room
Light timber-effect boards  wide glazed doors facing the lawn
Example of a Pecasa Garden Room
Cedar-clad garden room  French doors onto a dark deck

At a glance

  • What they build: Bespoke garden rooms and annexes, from home offices and gyms through to self-contained living accommodation with kitchens and bathrooms.
  • Design: An online configurator for mono-pitched and dual-pitched designs, door and window layouts and exterior finishes, followed by a design consultation to suit the use and the site.
  • Construction: Structural Insulated Panels made off-site in local workshops, so the building is weather-tight quickly and typical installations take around two weeks or less.
  • Inside: Plastered and decorated walls and ceilings, flooring chosen to suit the use, and lighting, power and data planned around how the room will be used.
  • Company: Pecasa Garden Rooms, working across North London, Hertfordshire and Buckinghamshire, with cladding from timber and composite to stone.

Part of our garden rooms guide →

Visit the Garden Annexes website
Uniquely designed
garden rooms
Pre-designed options
from £19,520
Or bespoke — tailored to
your use & garden
No planning permission
in most cases
Based in Brighton & Hove,
building across England
Explore options →
Design

Design-led process with an online configurator

For many clients, the process begins with Pecasa’s online design configurator. This allows you to explore both mono-pitched and dual-pitched designs, experiment with door and window layouts, and see a guide price update as you refine your choices. From there, projects move into a design consultation with the Pecasa team, where layouts, finishes, and technical details are developed further to suit both the intended use of the building and the constraints of the site.

The configurator also provides a clear overview of the range of exterior finishes Pecasa offer. Clients can choose from a wide selection of cladding styles, including durable timber options, maintenance-free composite materials, and more characterful finishes such as stone. Choices around cladding orientation, colour, aluminium doors, window styles, and contemporary detailing make it easier to tailor the appearance of the building to suit both personal taste and budget, while keeping the overall design cohesive.

Example of a Pecasa Garden Room
Lit at dusk  a framed front with lighting in the overhang
Example of a Pecasa Garden Room
Pale grey boards  with a matching store alongside
Construction

SIPs construction for shorter build times

Structurally, Pecasa build their garden rooms using Structural Insulated Panels (SIPs), which form a rigid, well-insulated core. Because these panels are pre-manufactured off-site, the main structure can be erected quickly and made weather-tight in a short timeframe. The result is a multi-layer building designed for comfortable, year-round use, with thermal performance that allows the space to be used much like a room in the main house.

Example of a Pecasa Garden Room
Cedar and dark frames  set up as a home gym
Example of a Pecasa Garden Room
Two finishes  dark boards on the front and natural timber on the side
Inside

High-quality interior finish and services

Internally, Pecasa finish their garden rooms to a high standard, with plastered and decorated walls and ceilings that give the space the feel of a room in a new build house. Flooring is chosen to suit the intended use of the room, allowing clients to balance practicality, comfort, and appearance.

Example of a Pecasa Garden Room
Inside  plastered walls, a herringbone-effect floor and air conditioning

Electrical layouts are developed as part of the design process, with Pecasa working alongside clients to plan lighting, power, and data points around how the space will be used. Heating and cooling systems can also be incorporated into the specification, helping to ensure the building remains comfortable throughout the year.

We also note that Pecasa Garden Rooms offer a finance option for those looking to spread the cost of their project.

Planning something similar?

Learn more about Pecasa Garden Rooms

To learn more about Pecasa Garden Rooms, visit their website, where the online design tool provides an easy way to explore options and view a guide price. You can also speak to the team on 020 8146 2200 or email info@pecasa.co.uk.

Visit Pecasa Garden Rooms More Pecasa Garden Rooms projects
More projects like this Garden offices Garden gyms Garden annexes SIPs construction
Read the guides What garden rooms cost Permitted development Buying a garden gym

Published 26 January 2026 · Photographs courtesy of Pecasa Garden Rooms.

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building across England
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Uniquely designed
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Or bespoke — tailored to
your use & garden
No planning permission
in most cases
Based in Brighton & Hove,
building across England
Explore options →
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More than a garden room: a complete annexe.

Design, planning, foundations, agreed connections and installation, in one fixed-price quote.

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