Made in Britainmember
10-year IWA insurance-backed warrantyon qualifying projects, subject to registration and policy terms.
Pecasa designs, manufactures and installs bespoke, fully insulated garden rooms in Mill Hill. Mill Hill homes often have generous, green gardens. A well-designed garden room makes the most of that space while staying within the planning limits.
Pecasa Ltd has completed more than 120 garden rooms, offices and annexes since 2017, and our team brings more than 100 years of combined construction experience. We manufacture our own Structural Insulated Panels (SIPs) in Watford. Our core team manages the build, with qualified specialists used where required.
We work across Mill Hill Village, Mill Hill Broadway, Mill Hill East and the surrounding NW7 area, and throughout the rest of the UK.
Your planning authority is the London Borough of Barnet. Our Mill Hill garden room did not need planning permission, because it was designed within the permitted development limits.
Many garden rooms used for purposes incidental to the house fall within permitted development and do not need planning permission, provided they meet the size, height and location limits; for example, within 2 m of a boundary the building must be no more than 2.5 m high. Self-contained annexes, flats and listed buildings have different rules. We give guidance at your free survey and can recommend an external planning consultant where an application is needed.
Mill Hill Village is a conservation area, where an outbuilding to the side of the house needs planning permission and design is looked at more closely.
Every Pecasa building is built to the Pecasa Standard: SIP walls, floor and roof made in our Watford factory, with EPS70 insulation as standard (75 mm to 250 mm) and PIR available as an upgrade; Radix ground screw foundations, subject to ground conditions and site suitability; a 1.5 mm EPDM rubber roof; Cortizo aluminium doors and windows; cladding chosen for your project; plasterboard walls with a tape-and-joint finish; 12 mm premium laminate flooring; and lighting and electrics designed to your requirements. [The Pecasa Standard]
Popular upgrades include Samsung or Mitsubishi air conditioning with Wi-Fi control, additional acoustic insulation, a WC or shower room, a kitchenette, composite decking, triple glazing, smart-home features and bespoke storage. Each upgrade is specified and priced in your quotation.
Site clearance, electrical supply connections to the building, water and drainage connections, skips and parking permits are priced separately.
Prices start from £23,000 including VAT for a 3 m × 2.8 m garden room. Every Pecasa building is bespoke, and your final quotation reflects the design, specification and site requirements. You will also receive a free 3D design and a written, VAT-inclusive quotation, normally within seven days of your survey.
For garden rooms up to 16 m², we guarantee installation within two weeks (10 working days) of the start of work on site, subject to the agreed specification, site access and weather. Typical working days on site:
Larger rooms and annexes are scheduled individually, and your quotation confirms the installation period for your project.
Not always. Our Mill Hill project did not, because it was designed within permitted development limits. Conservation areas and flats have extra rules, which we check at your survey.
Yes. Our factory is in Watford, a short drive from Mill Hill.
Prices start from £23,000 including VAT for a 3 m × 2.8 m garden room. Every Pecasa building is bespoke, and your final quotation reflects the design, specification and site requirements.
Contact us to book your free design consultation, or call 020 8146 2200. A member of our survey team visits your Mill Hill home, measures your garden, checks access and discusses how you will use the room. It usually takes 10–30 minutes. You will also receive a free 3D design and a written, VAT-inclusive quotation, normally within seven days of your survey.