Door Letterboxes – uPVC & Composite Letterbox Replacements

Which letterbox do I need? Most uPVC door letterboxes are 10 inch (plate about 265mm long) or 12 inch (about 305mm). Then check the door thickness where the letterbox sits: for the Yale letterbox, choose 20–40mm for a thinner panel or 40–80mm for a thicker midrail. Of the 420 Yale letterboxes we sold online in the last 12 months, 55% were 10" and 57% were for 40–80mm doors. Our letterbox measuring guide shows you how, with photos.

Order by 2pm for same-day dispatch · Not sure? Send a photo to info@homesecureshop.co.uk

Replacement letterboxes for uPVC and composite front doors, plus letterbox security for the inside of the door. Most letterboxes are a straight swap with a screwdriver.

Which letterbox do I need?

There's no single standard size, but most uPVC door letterboxes are one of two lengths:

  • 10 inch: plate about 265mm long
  • 12 inch: plate about 305mm long

Then check your door thickness where the letterbox sits. For the Yale letterbox, choose 20–40mm for a thinner door panel or 40–80mm for a thicker midrail. Of the 420 Yale letterboxes we sold online in the last 12 months, 55% were 10" and 57% were for 40–80mm doors.

Our letterbox measuring guide covers screw centres, the minimum hole size and door thickness, with photos.

Our letterboxes

  • Yale uPVC door letterbox: our best seller. A telescopic sleeve to fit different door thicknesses, a sprung aluminium flap and internal brushes. In gold (polished or matt), white (white or black surround), black, silver and chrome.
  • Slimline anti-vandal letterbox: blind bolts so it can't be unscrewed from outside, plus brushes and internal water seals.
  • Avocet Affinity letterplate: a contoured design that matches Avocet Affinity handles and knockers.
  • Wall-mounted post boxes: for homes where a door letterbox isn't practical, such as the Elegance wall-mounted letter box.

Letterbox security

A letterbox can be used to fish for keys, reach the inside handle, or post burning material. To protect the inside of the door:

  • Fire-retardant letterbox bag: catches post and can contain small fires. Our best-selling letterbox security product.
  • FlapGUARD: a lockable steel cover for the inside of the letterbox.
  • Two sash jammers on the inside flap make a simple letterbox lock.

Read how to prevent letterbox burglary, or see the full letterbox security range.

Complete your front door

See our door knockers, house numbers and letters and uPVC door handles.

Not sure which to buy? Read our guide to the best letterbox for uPVC doors
Filter and sort (0)
Sort by
Clear all
Hide filters
View as
Filter and sort
Clear all

Top 5 Recommended Letterboxes for uPVC & Composite Doors

View all →
#1
A white UPVC door letterbox with a spring-loaded aluminum flap, manufactured by Yale. Diagram of a 10-inch letterbox with full measurements Diagram of a 12-inch letterbox with full measurements Letterbox measuring guide showing how to measure cut-out width, cut-out height, and door thickness for a uPVC or composite front door
Quick view
Yale
Yale UPVC Door Letterbox - White (White Surround) – uPVC & Composite DoorsYale UPVC Door Letterbox - White (White Surround) £11.99
K. Payment options available
12 reviews
Choose options View details
#2
A chrome-plated Yale UPVC door letterbox with smooth round edges, featuring a spring-loaded aluminum flap. Diagram of a 10-inch letterbox with full measurements Diagram of a 12-inch letterbox with full measurements Letterbox measuring guide showing how to measure cut-out width, cut-out height, and door thickness for a uPVC or composite front door
Quick view
Yale
Yale UPVC Door Letterbox - Chrome – uPVC & Composite DoorsYale UPVC Door Letterbox - Chrome £19.99
K. Payment options available
4 reviews
Choose options View details
#3
A black UPVC door letterbox with smooth round edges from Yale. Diagram of a 10-inch letterbox with full measurements Diagram of a 12-inch letterbox with full measurements Letterbox measuring guide showing how to measure cut-out width, cut-out height, and door thickness for a uPVC or composite front door
Quick view
Yale
Yale UPVC Door Letterbox - Black – uPVC & Composite DoorsYale UPVC Door Letterbox - Black £11.99
K. Payment options available
5 reviews
In stock (967)
Choose options View details
#4
A gold-colored Yale UPVC door letterbox with a telescopic sleeve and spring-loaded aluminum flap, displayed against a plain background. Diagram of a 10-inch letterbox with full measurements Diagram of a 12-inch letterbox with detailed measurements Letterbox measuring guide showing how to measure cut-out width, cut-out height, and door thickness for a uPVC or composite front door
Quick view
Yale
Yale UPVC Door Letterbox - Gold (Matt) – uPVC & Composite DoorsYale UPVC Door Letterbox - Gold (Matt) £11.99
K. Payment options available
3 reviews
Choose options View details
#5
White fire-retardant letterbox bag, cut away to show post inside, with a zip along the bottom White fire retardant letterbox security bag fitted inside a front door, showing the discreet internal letterbox cover with zipped mail storage. Fire-retardant letterbox bag dimensions and features Three types of doors: Timber, Composite, and uPVC, with text indicating suitability for different door types.
Quick view
Home Secure
Fire Proof Retardant Letterbox Bag. Internal Letter Box Security Cover – uPVC & Composite DoorsFire Proof Retardant Letterbox Bag. Internal Letter Box Security Cover £99.99
K. Payment options available
Choose options View details

All Door Letterboxes – uPVC & Composite Letterbox Replacements

1-15 of 15 products

Frequently Asked Questions

Measure three things: the aperture (the hole cut in the door, width by height), the overall external plate size, and the fixing centres — the distance between the two fixing bolts. The new letterbox's aperture must be equal to or larger than the hole, with the plate covering it completely.

There's no single standard, but most uPVC door letterboxes are 10 inch (plate about 265mm long) or 12 inch (about 305mm). Of the Yale letterboxes we sold online in the last 12 months, 55% were 10 inch.

Check your door thickness where the letterbox sits. The Yale letterbox has a telescopic sleeve and comes in two versions: 20–40mm for a thinner door panel, or 40–80mm for a thicker midrail. Our letterbox measuring guide shows how to measure, with photos.

Cover the inside of the letterbox. The FlapGUARD is a lockable steel cover that still lets post through, and the fire-retardant letterbox bag catches your post and can contain small fires. If you're replacing the letterbox, our Slimline anti-vandal letterbox has blind bolts so it can't be unscrewed from outside.

Brushes help. The Yale letterbox has internal brushes, and the Slimline anti-vandal letterbox has brushes and internal water seals. A worn or damaged letterbox is worth replacing if you can feel a draught in the hall.

The Yale letterbox comes in gold (polished or matt), white (with a white or black surround), black, silver and chrome. Order by 2pm for same-day dispatch.