Best Security Letterboxes Deals Online in the UK (25 Deals Found)

Last Updated - 18/12/2025 Sort By:

Best Choice
HomeSecure

New
Home Secure Letterbox Lock – Internal Letterbox Security Swing Lock for uPVC & Composite Doors – Anti-Fishing Mail Guard
ANTI-ARSON & MAIL THEFT PROTECTION: Helps protect your home from letterbox attacks by restricting access to the letterbo

£7.99
HomeSecure

New
Fire Proof Retardant Letterbox Bag. Dog Proof Mail Catcher. Internal Letter Box Cover. Extra Security
Easy to Install - Easily fitted in minutes to almost any door, including uPVC using simple tools

£109.99
New
UPVC 12 Inch Heavy Duty Letterbox -Fits 40-80mm Door Thickness, Durable & Secure
It’s designed to suit doors with a thickness of 40mm to 80mm and is compatible with timber, composite, and uPVC doors. S

£32.99
Blockabox

New
Blockabox – White Coloured Powder Coated Anti Arson Letterbox, Letterbox Cover, Letter Box Blocker, Empty & Void Propert
Quick and Easy Installation: Equipped with a user-friendly design, BLOCKABOX can be securely fitted within just three mi

£29.00
New
Fire Proof Retardant Resistant Security Letterbox Bag. Internal Security Cover
The letterbox can be securely locked closed when required. Fire Proof Retardant Resistant Security Letterbox Bag. Intern

£109.99
UAP

New
UAP Stainless Steel Hidden Fix Letterplate Restrictor Shrouds - Letterbox Cowl Visor Guard for Extra Security (White)
PROMOTES SAFETY AND SECURITY: The UAP Screw Fix Letterplate Restrictor Shroud helps to keep your home safe with its simp

£9.99
Best Value
Yale

New
Yale P-YLPR-CH Letterplate Restrictor, Polished Chrome Finish, High Security, Visi Packed, Suitable for Wooden, PVCu and
Easy to install

£11.84 £12.99
New
Letterbox Cover. Extra Security Letterbox Guard
Select your Colour: White, Brass or Aluminium Extra Security for Doors Easy to fit, simply screw onto inside of door Scr

£9.99
keypak

New
Keypak 344mm Letterbox Security Cowl – Anti-Fishing Plate & Letter Box Shield for uPVC, Composite & Timber Doors (Silver
SECURITY ENHANCEMENT: Adds an extra layer of protection to your letterbox by preventing unauthorised access through the

£8.99
New
Internal Letter box Cover. Extra Security Letterbox Visor Guard.
Select your Colour: White, Brass or Aluminium Extra Security for Doors Easy to fit, simply screw onto inside of door Scr

£9.99
keypak

Used
Keypak 344mm Letterbox Security Cowl – Anti-Fishing Plate & Letter Box Shield for uPVC, Composite & Timber Doors (Silver
SECURITY ENHANCEMENT: Adds an extra layer of protection to your letterbox by preventing unauthorised access through the

£6.46
20% Off
FIGCY

New
Window Locks for UPVC Windows and Doors, 2-Pack Durable Security Locks, Easy to Install, for Home Door Security and Lett
✅【Enhance Home Security】: These T-handle window locks are perfect for UPVC windows and doors, providing an added layer o

£5.59 £6.99
New
Letterbox Security Cover with Swing Lock for Enhanced Protection
Letterbox Security Cover Guard. Letterbox Swing Lock Door Security Letter Box Lock. Crafted from strong, durable zinc, t

£10.99
Homewatch

New
Homewatch Letterplate Restrictor Shroud Cowl Visor Guard - Letterbox Cover for Extra Security - Silver Grey - Hidden Fix
Letterbox security device

£14.99
New
Letterbox Security Cover Guard. Letterbox Swing Lock Door Security Lock
Letterbox Security Cover Guard. Letterbox Swing Lock Door Security Letter Box. Letterbox Security Cover Guard enhances d

£8.75
MSMXCS

New
2PCS Door Letter Box Flap Sash Jammers Window Locks Letterbox Security Cover Guard Swing Lock Door Security Letter Box L
Package Contents: This window lock comes in a set of two, featuring T-shaped locks. It inherits exquisite craftsmanship,

£6.59 £6.99
New
Lockable Wall Mount Parcel Box Letterbox Post Box Slots Letters Safe Parcel Note
Lockable Wall Mount Parcel Box Say goodbye to waiting in for parcels and the dreaded "Sorry We Missed You" cards through

£73.95
New
Lockable Wall Mounted Post Parcel Box - Secure Mail Letter Box
Features a lockable internal flap with two sets of keys. Whether you're planning to treat yourself to a new garden bench

£29.00
New
Large Mailbox Steel Wall-Mounted Letterbox Secure Key Lock Parcel Post Box
Fittings are included for mounting the box to a wall. Secure lock with set of 2 keys.

£13.97
New
UAP Framemaster 12" Door Letterbox Premium Secure Letter Box 40-80mm White
TS008 UAP Soterian Letterplate Premium Letter Box Internal External Graphite. TS008 UAP Soterian Letterplate Letter Box

£15.99
New
Letterbox Security Cover Guard. Letterbox Swing Lock Door Security Letter Box Lo
Keep yourself and your family safe. Used ideally at night to prevent arson attacks, the unique swing latch design allows

£10.43
New
Wall Mounted Post Box Swift Modern Letterbox Secure Stainless Steel
Every item is held in our warehouse and dispatched directly by our team. not mass-produced imports. We're a real team wh

£82.99
New
Letter Box SECURITY HOOD - Stops Key Fishing & Made in England
Aluminium, White, Black, Polished Brass, Brushed Stainless Steel. your house keys or car keys left unattended. (Key Fish

£6.02
Used
Fire Proof Retardant Resistant Security Letterbox Bag. Internal Security Cover
Easy to Install - Easily fitted in minutes to almost any door, including uPVC using simple tools Anti-Social Behaviour -

£63.10
New
Personalised Black Wall-Mounted Combination Lock Letterbox Secure Mail Post Box
1 x Personalised Black Letterbox. All trade and personalised. Secure Locking – 3-digit combination lock – No keys needed

£34.99

25 Security Letterboxes deals are available from: Amazon, eBay stores, starting from £5.59.
The biggest discount we found is 20% on Window Locks for UPVC Windows and Doors, 2-Pack Durable Security Locks, Easy to Install, for Home Door Security and Letterbox Lock Safety Solutions at Amazon.
The lowest price we found is £5.59 while the highest is £109.99.
Prices for the best Security Letterboxes deals average at £28.98.
Last updated on December 18, 2025.
We scanned these quality online stores and more to deliver you with the best offers online available for Security Letterboxes.