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Post Boxes | Letter Boxes | Mailboxes | Post Boxes UK

H300 1 Multiple Occupancy Letterboxes Post Box Mailbox

H300 1 Multiple Occupancy Letterboxes Post Box Mailbox

The biggest selling of all the multiple occupancy letterboxes in the UK. Also known as a space saving units, and the H300-1 is suitable for both small scale apartment and flat projects and the largest of multi-use developments. It is also available as a large capacity letter box - our models H300-2 and H300-3.

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This horizontal post box has dimensions of 300mm width, 110mm height and 380mm depth, and has become an industry standard across Europe for high density residential schemes and commercial office developments. It is a front-entry front-retrieval letter box (in-front, out-front) and conforms to EN13724 (accpets A4 mail without having to fold or bend the envelope, has anti-theft baffle to aperture) and is Royal Mail approved. Where applicable, it complies to Secured By Design requirements (clauses 21.19 and 24.6).

The model H300-1 is designed to incorporated and assembled into large banks of mailboxes - typically, from small banks of 6 units up to larger banks of 300+ units. As such the model H300-1 post box is most suited to large scale city centre residential schemes and student accommodation.

The H300-1 is available in any RAL finish, many of which are stock finishes. Non-stock finishes incur a small surchage for small orders. Gloss levels can also be specified as required. It is also available in (brushed) satin stainless steel, marine grade 316.

It is suitable for both internal and external use with a choice of different casings, surrounds and support legs.

The model H300-1 can also be fitted with an internal fire extinguisher. This is a much more economical solution than specifying a bank of fire rated mailboxes.


  • Manufactured and bank-assembled in Europe.
  • Horizontal mailbox suitable for internal or external use, either wall mounted, wall recessed, or free standing on support legs.
  • Dimensions per unit: 300 x 110 x 380mm (width, height, depth).
  • Aperture size: 260 x 35mm. Conforms to EN 13274 (accepts A4 envelope without having to fold or bend; anti-theft flap to inner aperture).
  • Mailbox body and door manufactured from steel, flap manufactured from cast aluminium.
  • High / extra large capacity H300-2 and H300-3 mailboxes available.
  • Each mailbox comes complete with 2 keys (204 differs). Additional letter box keys available at time of order only.
  • Secure postbox, with 1.2mm thick steel doors, high quality Eurolock lock and extra wide security flap to inner aperture.
  • Hinged to right, side opening.
  • Available in any RAL colour of choice (door and flap only) – please see our RAL colour chart. Also available in satin (brushed) stainless steel, and bronze, silver and gold anodised finishes.
  • Numbering and lettering to flap can be specified for an additional charge.
  • Secured By Design compliant (clauses 21.19 and 24.6) where applicable.
  • Anti arson mailbox / fire proof compatible.
  • Choice of surrounds and support legs depending upon type of application.
  • Blank door (without flap) and parcel shelf system can be specified for uneven bank configurations.
  • Post Boxes UK recommends a maximum bank size of 72 multiple occupancy letterboxes in a six wide twelve high configuration (6w 12h). Should you wish to specify a larger bank size than this, please call us on +44 (0)121 288 0838 to discuss.


Should you require any further information regarding H300-1 multiple occupancy letterboxes or wish to discuss your enquiry, please call Post Boxes UK today on +44 (0)121 288 0838. Alternatively, your enquiry can be emailed to and where possible, we would that drawings be sent in pdf format. Thank you.

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