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Windows, Doors & Ironmongery · Accessories & Add-ons

Letterboxes & House Numbers: What Else You'll Need

By the Nest & Yard editorial teamUpdated 2026-08-093 min read

Our pick: the House Sign Modern Glass Effect Acrylic Door Number, Name & Road Plate Plaque — the best Letterboxes & House Numbers we tested, from £10.99.

Choosing a new letterbox or house number is just the first step to ensuring your address is clearly visible and securely protected. Alongside the primary product itself, many homeowners overlook essential accessories that can significantly improve installation and long-term maintenance – think about mounting options, protective cases for vulnerable components, or replacement parts for future needs. This guide explores frequently required add-ons like cable runs, wall mounts, and protective covers, helping you prepare for everything from initial fitting to ongoing upkeep of your chosen letterbox or number.

See the full range in Letterboxes & House Numbers.

House Sign Modern Glass Effect Acrylic Door Number, Name & Road Plate Plaque
Editor's Choice

#1 Pick

House Sign Modern Glass Effect Acrylic Door Number, Name & Road Plate Plaque
Rated 4.7 out of 5 stars (8,800)
  • Acrylic
  • Black

£10.99

Pros

  • Glass-effect acrylic gives a premium look at an affordable price
  • One of the best-selling house signs on Amazon UK by review count
  • Personalisable text options for house name, number or road name

Cons

  • Acrylic is more prone to scratching than metal alternatives
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Burg-Wächter MB01BK Classic Wall Mounted Galvanised Steel Lockable Post Box, Black
Best Value

#2 Pick

Burg-Wächter MB01BK Classic Wall Mounted Galvanised Steel Lockable Post Box, Black
Rated 4.5 out of 5 stars (6,862)
  • Metal
  • Black

£30.59

Pros

  • Lockable galvanised steel body keeps post secure and dry outdoors
  • Very well reviewed with close to 7,000 verified ratings
  • Compact wall-mounted design suits porches and front walls

Cons

  • Wall fixing needs a solid masonry surface for a secure mount
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£28.26

Pros

  • Chartwell green finish suits period doors and cottage-style homes
  • Same trusted lockable design as the best-selling black version
  • Galvanised steel resists rust in all-weather outdoor use

Cons

  • Green colourway will not match every front door or porch scheme
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K Smart Sign Exalted Composite Aluminium Floating House Sign Plaque Number, 200mm x 130mm, Anthracite Grey
Best Budget

#4 Pick

K Smart Sign Exalted Composite Aluminium Floating House Sign Plaque Number, 200mm x 130mm, Anthracite Grey
Rated 4.5 out of 5 stars (3,800)
  • Aluminium
  • Anthracite Grey

£7.99

Pros

  • Floating fixings give a modern raised-off-the-wall look
  • Composite aluminium panel resists fading and corrosion outdoors
  • Very well reviewed, popular budget house sign choice

Cons

  • Fixed anthracite colourway will not suit every house facade
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FAQ

What should I look for in terms of letterbox seals?

Letterbox seals are essential for keeping the weather out and preventing draughts. Consider rubber or foam seals, ensuring they're sized appropriately for your letterbox design – some boxes require specific seal thicknesses.

Do all letterboxes come with a delivery chute?

Not always; many modern letterboxes have a removable delivery chute to prevent post from falling directly into the box. Check the product description to confirm whether one is included before ordering.

What's typically included in a house number set?

Generally, a house number set will include the numbers themselves, often made of cast aluminium or acrylic, along with wall fixings like screws and plugs. However, mounting boards are frequently sold separately.

I need to secure my house numbers to brick – what do I need?

Brick requires special fixing solutions; you’ll almost certainly need a masonry drill bit (typically 6mm or 8mm) and appropriate wall plugs designed for brickwork alongside the screws provided with your numbers.

Are there different types of mounting boards for house numbers?

Yes, mounting boards can be plain wood, textured composite materials, or even slate. Choose a board that complements your property's style and provides sufficient grip for the number fixings.

Do I need to weatherproof my letterbox?

While some letterboxes offer inherent weather protection, adding a small amount of silicone sealant around the edges can further prevent water ingress, particularly if your box has gaps or seams.

What size screws are typically supplied with house numbers?

Screws provided with house numbers often range from 30mm to 40mm in length; ensure these are sufficient for penetrating the wall material you’re using – longer screws may be necessary for plasterboard.

Are there any accessories that can improve letterbox security?

Consider a letterbox locking mechanism or a protective cover to deter theft and protect your mail from the elements; many designs offer simple installation.

What if the wall I’m mounting my house numbers onto is uneven?

Use wall levelling beads between the mounting board and the wall to compensate for any irregularities, ensuring the numbers are aligned correctly before fixing permanently.

Can I adjust the angle of a house number once it's mounted?

Some house numbers have adjustable brackets allowing you to fine-tune their orientation. Check the product specifications to confirm if this feature is available and how it works.

In depth

Planning a new letterbox installation often reveals a need for more than just the box itself. Alongside the core product, there’s a range of accessories and consumables that frequently enhance the process and ensure a smooth fit, particularly when dealing with older property infrastructure. These are items buyers don't always immediately consider when initially purchasing a letterbox, but which can significantly improve the installation experience or address potential issues.

Firstly, let’s look at the foundational elements – fixings. While many letterboxes come supplied with basic screws and plugs suitable for standard plasterboard walls, it’s wise to have a selection of alternative fixings readily available. This could include longer screws for deeper wall plates, different types of plugs designed for brick or stone construction, and potentially even adhesive strips for temporary installations or repairs before permanent fixing. Having a range of sizes and materials allows for adaptability across various building types and ensures a secure, long-lasting installation.

Secondly, consider the impact of wall preparation. Even with modern plasterboard, it’s common to encounter uneven surfaces or damaged areas. A small toolkit containing filling compounds, sanding blocks in varying grits, and possibly even a light-duty scraper can be invaluable for preparing the walls before fixing the letterbox. Addressing these surface imperfections beforehand will not only improve the aesthetic appearance of the installed letterbox but also contribute to its overall stability and longevity.

Next, let’s examine tools that simplify the process. While a basic screwdriver might suffice, investing in a small set of high-quality screwdrivers with interchangeable bits can drastically reduce installation time and effort. A small spirit level is crucial for ensuring accurate alignment, preventing the letterbox from being installed at an awkward angle. Similarly, a depth gauge or block plane can be useful for achieving consistent recess depths – particularly important when fitting into existing wall cavities.

Then there are consumable items that frequently get overlooked. Sealant, specifically silicone sealant, is incredibly beneficial for creating a weatherproof seal around the letterbox’s edges, preventing water ingress and protecting the surrounding area from damp. A supply of small brushes or applicators ensures precise application without messy drips. Additionally, consider purchasing extra plugs and screws – it’s remarkably easy to lose count during installation!

Finally, don't underestimate the value of protective measures. Protecting both the new letterbox and the walls from scratches and damage is essential, particularly when working in tight spaces. Sandpaper, masking tape, and perhaps even a soft cloth can help prevent accidental harm during the fitting process. These small preventative measures ultimately contribute to a professional-looking finish and minimise the risk of costly repairs down the line.

The Nest & Yard editorial team

Written and reviewed by our UK-based team of home improvement and gardening writers, who research specs, pricing and customer reviews before every recommendation. Reviewed and updated on 2026-08-09.

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