The Jacobi Jayne Schwegler 1B Bird Nest Box is the overall pick for a long-lasting 32mm hole that suits house sparrows and several tit species. If robins are the birds you see most, the Gardman Robin Nest Box is the clearer alternative because its open front matches how those birds nest, rather than forcing them into a hole they will ignore.
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These bird nest boxes were chosen from the makers’ published specifications and live UK retail listings, checked October 2026. They have not been tested by us. The list mixes hole sizes, an open front nest box, a three-chamber terrace and a starling box so a reader can match the entrance to the species that already use the garden.
What Hole Size Does a UK Garden Bird Need?
Match the entrance to the species you hope will nest, because a hole that is only just large enough keeps out larger competitors and some predators. The RSPB nest box guide is plain on this: a 25mm hole suits blue tit, coal tit and marsh tit and will exclude larger birds, while a 32mm entrance hole suits house sparrow, nuthatch and several tit species. A 28mm hole is a middle setting used on some tit boxes. Starlings need a much larger 45mm hole and a bigger chamber; drilling 45mm into a tit box does not create enough space. Robins, wrens and pied wagtails use an open front nest box, not a round hole. House sparrows and starlings are in serious decline, so a 32mm box on a house wall or a dedicated starling box is a genuine conservation choice, not a leftover after the tits have been served.
The BTO buying advice is equally firm on internal size: a small hole box should have an internal floor of at least 130 square centimetres, and timber walls should be at least 15mm thick so the chamber stays insulated. Decorative boxes that look like cottages often fail those figures. A perch on the front is a foothold for squirrels and weasels; birds do not need one to enter.
Where Should You Fix a Nest Box?
Fix a small-hole box 1 to 3 metres up, with a clear flight path and the entrance facing away from the wettest wind, usually somewhere between north and south-east. The BTO siting page asks for the front to sit vertical or tilt slightly down so rain cannot run in, and it warns against placing two boxes of the same type close together. Open-fronted boxes should sit against a wall or fence that already has climbers, so the entrance is hidden from magpies. Keep the box well away from a busy feeding station: the traffic around wild bird feeders can disturb a sitting bird. A metal plate around the hole can slow squirrels and woodpeckers. Site sparrow boxes away from house martin cups, and do not treat a chicken coop tray as a substitute; poultry kit belongs on the chicken nest boxes page.
Put the box up whenever you have a free afternoon. Pairs start prospecting from late February, yet a box fixed in June can still become a winter roost. Use stainless or galvanised fixings. On a living tree, a wire or strap that you check each year is kinder than a rusting nail that grows into the bark.
How Do These Bird Nest Boxes Compare?
| Name | Type | Entrance | Material | Cleaning access |
|---|---|---|---|---|
| Jacobi Jayne Schwegler 1B Bird Nest Box | Hole box | 32mm | Woodcrete (wood, concrete, clay) | Sliding front panel |
| Gardman Robin Nest Box | Open front | Open front | FSC timber | Removable floor |
| National Trust Aspen Larch 28mm Nest Box | Hole box | 28mm | Larch with green roof | Side opening |
| Walter Harrison’s Wooden Wild Bird House | Hole box | 32mm | Wood with clear preservative | Removable front panel |
| Green Feathers Wooden Deluxe Bird Box | Camera hole box | 32mm | 21mm timber panels | Not stated |
| Woodside Sparrow Colony Terrace Nest Box | Three-chamber terrace | 5 x 3.5 cm | Fir wood, asphalt roof | Removable entrance panels |
| Wildlife World Camera Ready Nest Box | Camera hole box | Small hole (size not stated) | FSC untreated timber | Not stated |
| Supa Wild Bird Multi-Purpose Nesting Box | Convertible hole or open front | Hole, or open if panel removed | Wood | Removable front panel |
| Gardman Multi Nest Bird Box | Interchangeable fronts | 32mm, 28mm or open front | FSC timber | Removable floor |
| TRIXIE Nesting Box for Starlings | Starling hole box | 4.5 cm | Glazed pine and galvanised metal | Hinged front |
Which Materials and Safety Details Matter?
Woodcrete and thick timber both work if the chamber is dry, dark and free of chemical fumes. The Schwegler 1B is air-permeable wood, concrete and clay, so condensation is less likely than in a thin painted crate. Green Feathers states 21mm panels, which is well above the BTO 15mm floor. FSC timber on the Gardman and Wildlife World boxes is a sourcing claim, not a proof of thickness, so check the listing figures. Untreated interiors are the safe default; if you add a water-based preservative, keep it on the outside and apply it in winter. Never line a new box with straw or fabric. Birds bring their own nest material, and damp lining traps moisture against eggs.
Camera boxes add a side window or a camera mount so you can watch without lifting the lid during breeding. Pair one with a discrete camera from the wildlife cameras guide, then leave the family alone once eggs are down. A perspex light panel is for the camera, not for daily peeping.
How Should You Put Up and Clean a Nest Box?
Follow a short sequence so the box is legal to empty and safe to reuse.
- Check the hole size against the species you already see, then pick a wall, fence or trunk 1 to 3 metres up with a clear approach.
- Face the entrance away from the wettest wind and tilt the front slightly down so rain sheds off the roof.
- Fix with stainless or galvanised screws, or a checked wire strap on a living tree, and keep cats off the climb-up route.
- Leave the box undisturbed from first nest building until the last brood has fledged, including late sparrow broods.
- Between 1 September and 31 January, once the box is empty, lift out the old nest and scald the inside with boiling water.
- Let it dry fully, then rehang it so winter roosting birds can use the chamber.
- Wear gloves, wash your hands, and never use insecticide or flea powder in the box.
The Wildlife Trusts cleaning advice matches that boiling-water method and repeats the legal window for eggs: unsuccessful eggs may be removed only from September to January inclusive and must be destroyed. The Wildlife and Countryside Act 1981 does not allow you to keep them.
Frequently Asked Questions
Do Garden Birds Need a Perch Under the Hole?
No. The RSPB says a perch helps predators and competing birds, and the nesting species can cling to the front without one. Choose a box that has no dowel under the entrance.
Can One Box Serve Tits and House Sparrows?
A 32mm hole lets both groups enter. If you want to keep house sparrows out of a tit box, drop to 25mm. If sparrows are the priority, use 32mm and keep that box away from tit boxes and martin colonies.
When Can You Legally Empty a Nest Box?
Bird protection law allows old nests to be cleaned out between 1 September and 31 January. Confirm the box is empty first, because some sparrows raise late broods.
Why Has Nobody Used the Box After Two Springs?
The BTO lists nearby natural holes and territory boundaries as common reasons. If a box stays empty for several seasons, move it rather than adding a second box of the same type beside it.
Is a Camera Box Safe During Breeding?
A purpose-built camera box with a sealed mount is designed so you do not open the chamber. Fit the camera in winter, then leave the nest alone once birds start carrying material.
Last reviewed: 5 October 2026.
Bird Nest Boxes to Compare
Jacobi Jayne Schwegler 1B Bird Nest Box
A woodcrete 32mm hole box for house sparrows and tits, with a sliding front and a 25-year guarantee that suits anyone who wants one box to last for decades.
Gardman Robin Nest Box
An open-front FSC timber box with a removable floor, aimed at robins and other small birds that will not use a round hole.
National Trust Aspen Larch 28mm Nest Box
A larch tit box with a 28mm hole and a green sloping roof that opens at the side, suited to tree sparrows and the common UK tit species.
Walter Harrison’s Wooden Wild Bird House
A 32mm wooden hole box with no perch, a removable front and a separate tree-mount plinth, for anyone who wants a simple sparrow-and-tit box they can open to clean.
Green Feathers Wooden Deluxe Bird Box
A thick 21mm-panel 32mm camera box with a roomy interior and a camera mounting point, for households that want to watch nesting without opening the lid.
Woodside Sparrow Colony Terrace Nest Box
A three-chamber fir terrace with an asphalt roof and removable entrance panels, built for house sparrows that prefer to nest beside their neighbours.
Wildlife World Camera Ready Nest Box
An FSC timber camera box with a perspex teardrop side window and an opaque light panel, aimed at tits and sparrows when you want a daytime nest view.
Supa Wild Bird Multi-Purpose Nesting Box
A compact wooden box that converts from a hole front to an open front nest box by removing two screws, useful if you are still learning which species visit.
Gardman Multi Nest Bird Box
An FSC timber box with interchangeable 32mm, 28mm and open fronts plus a removable floor, so one body can be reset if the first species does not take it.
TRIXIE Nesting Box for Starlings
A glazed pine starling box with a 4.5 cm entrance, a hinged front and a metal woodpecker plate, for gardens that already hear starlings and need a larger chamber.