Custom Size Window Box Planter – Bespoke Metal Windowsill Planter (Coated Steel)
$98.68
Custom Size Window Box Planter – Bespoke Metal Windowsill Planter (Coated Steel)
📏 Made to Measure – Please Read Before Ordering
This listing is for a basic rectangular custom window box planter made to your specified size within the limits below:
Maximum Length: 94.5cm (945mm)
Maximum Height: 12cm (120mm)
Maximum Depth: 12cm (120mm)
✔ You must include your required dimensions when ordering.
✔ If no dimensions are provided, the planter will be made to the maximum size above.
✔ Sizes cannot exceed the maximum limits stated.
Please double-check your measurements before purchasing.
Designed to fit your window perfectly, these bespoke metal window sill planters are ideal for adding structure, colour and greenery to your home exterior.
Perfect for:
Window sill planters
Custom window boxes
Balcony planters
Patio trough planters
Fence top planters
Kitchen herb gardens
Urban and city gardening
Modern exterior styling
(Brackets are not included).
How to Measure Your Window Sill
To ensure the perfect fit:
Measure the full width of your sill.
Allow a small clearance (5–10mm) if fitting between walls.
Check the depth of the sill to ensure 12cm will sit comfortably.
Confirm there is sufficient support underneath.
All planters are made to the measurements provided. (please do allow for -/+ 5mm tolerance)
Materials & Finish
Made from 0.7mm high-quality coated steel roofing material, typically used on industrial roofs and cladded buildings.
✔ Strong and durable
✔ Weather-resistant coated finish
✔ Heavy-duty construction
✔ Handmade to order
Available Colours:
Slate Blue – Dark grey with a noticeable blue hue, smooth finish
Black – Smooth painted finish
(A 100mm x 100mm colour swatch is available (£3.95 including postage) via separate listing).
Construction Details
Handmade in Grantham, Lincolnshire
Hand riveted with matching rivets
Built-in drainage
Fully detachable black rubber safety edge fitted to the top rim
For longevity, lining before planting is recommended (optional). Pond liner works very well, though tin foil can also be used.
Recycled & Repurposed Material
Each planter is made from prime industrial roofing offcuts, many of which would otherwise have gone to scrap.
Due to the nature of repurposed coated steel, occasional light scratches or minor cosmetic marks may be present. These do not affect use and are part of the character of recycled materials.
A True Made-to-Measure Window Box
This listing allows you to order a planter tailored to your window size within the maximum dimensions stated.
Clean-lined, durable and built to last — ideal for balcony planting, herb gardens, and modern exterior design.
Shipping from United Kingdom
Processing time
1-2 weeks
Customs and import taxes
Buyers are responsible for any customs and import taxes that may apply. I'm not responsible for delays due to customs.
Payment Options
Returns & Exchanges
I gladly accept returns, exchanges, and cancellations
Just contact me within: 14 days of delivery
Ship items back to me within: 30 days of delivery
Conditions of return
Buyers are responsible for return shipping costs. If the item is not returned in its original condition, the buyer is responsible for any loss in value.
Questions about your order?
Please contact me if you have any problems with your order.
Frequently Asked Questions
Delivery & Returns of standard items;
All deliveries are made by our courier, currently APC. They provide a next day service across Mainland UK. If however you are located offshore, or in Northern Ireland delivery will be via Parcel Force so please allow up to 14 days in this instance.
Should you wish to return an item, please contact us before returning items. If the item is damaged or faulty you will be offered a replacement.
If the item is simply "unwanted" the cost of returning the item will be at the buyers expense, it must be received in a resalable condition at which point a full refund will be given for the cost of the item.
If my Order isn't arrived what do I do?
In the unlikely event of the order not arriving, we ask that you check with your local depot initially.
For APC deliveries you will be provided with a courier consignment number which you can use on the APC website to locate your parcel.
For Royal Mail (parcel force) despatch this will be your local Royal Mail Delivery Office.
Should you still experience difficulties please do contact us.
Can you Gift Wrap my Order?
Absolutely we can, just select the Gift Wrap Service from the list of items for sale, and rest assured your item will be gift wrapped prior to despatch.
I would like Drainage Holes adding, is this possible?
I am not able to add drainage holes to the Planters or Window Boxes any longer, they aren’t really needed. Please do remember that the planters in most cases are only fixed on 1 base edge, and loose on the other 3 so drainage holes are unnecessary hence not offered as standard.
Custom and personalised orders
I can certainly do custom orders, please be aware however, the material may need to be ordered in especially so the price may be more than the planters in the shop, also I am not a robot so please allow a degree of tolerance with the measurements -/+5mm I do may best but sometimes the metal doesn’t play ball :)
Obviously, unless a serious error has been made, or damage in transit custom orders are non returnable.
Reviews (4)
Average:
Aug 12, 2025
High quality & just the right size for my window ledge Like the rubber edging so no sharp corners - that is very thoughtful Customer service was great when I contacted them for my specific size requirements Would certainly recommend Thank you
Debbie
Jun 11, 2025
Superb - I was so pleased with my first order I bought another one. This time I ordered a bespoke size. Wow fantastic and “bullet proof” packaging, cheers Nick
Nick
Jul 18, 2023
Great communication from seller on a custom size required. Very quick turn around and shipping. Great quality product and looks amazing, thank you.
Chantal Harding
Mar 7, 2023
Great planter and really fast delivery
Becky Melville