Where's That Bird?

Best nest boxes for UK garden birds

The hole size decides who moves in. Get that right and the rest is where you put it.

Updated 2 October 2026

25mm for blue, coal and marsh tits. 28mm for great tits and tree sparrows. 32mm for house sparrows and nuthatches. 45mm for starlings. Robins and wrens want an open front, not a hole.

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Quick picks

Wooden nest box (32mm hole) Our pickBest all-rounderCheck priceWooden nest box (28mm hole)Best for blue titsCheck priceSchwegler 1B woodcrete nest box Our pickLongest lastingCheck priceOpen-fronted nest boxFor robins and wrensCheck priceSparrow terrace nest boxFor house sparrowsCheck priceSwift nest boxFor swiftsCheck price
A Schwegler 1B nest box with a 32mm hole
A Schwegler 1B nest box with a 32mm holePhoto: Marie-Lan TaΓΏ Pamart, CC BY 4.0

Best all-rounder: wooden box, 32mm hole

Wooden nest box (32mm hole)Our pick

A 32mm hole takes house sparrows, great tits and blue tits, so it is the safest first box. Look for timber at least 15mm thick, a hinged or removable lid for cleaning and no perch.

βœ“ Suits the widest range of garden birds; cheap; easy to clean
βœ• Softwood lasts five to ten years, less if it sits in full weather
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Best for blue tits: 25mm or 28mm hole

Wooden nest box (28mm hole)

A smaller hole keeps sparrows and starlings out and leaves the box for tits. Buy one with a metal plate round the hole, or add a plate, so woodpeckers and squirrels cannot enlarge it.

βœ“ Tits take to them fast; a hole plate stops predators widening the entrance
βœ• Too small for sparrows
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Longest lasting: woodcrete

Schwegler 1B woodcrete nest boxOur pick

Woodcrete is a wood fibre and concrete mix. It does not rot, holds a steadier temperature than thin timber and woodpeckers cannot break in. The 1B is widely used on nature reserves.

βœ“ Lasts decades; predator-proof; front lifts off for cleaning
βœ• Heavier and dearer than timber; hangs from a branch or nail, so check the fixing
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For robins and wrens: open-fronted box

Open-fronted nest box

Robins, wrens and spotted flycatchers ignore hole boxes. They want a half-open front, set low and hidden in ivy or a thick hedge.

βœ“ The only box type robins will use
βœ• Needs dense cover around it or predators find it
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For house sparrows: terrace box

Sparrow terrace nest box

House sparrows nest in loose colonies. A terrace gives two or three chambers in one box, fixed high under the eaves.

βœ“ Suits a Red-listed bird that has lost most of its roof spaces
βœ• Often only one chamber gets used in a season
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For swifts: swift box

Swift nest box

Swifts need a box at least 5m up with a clear drop below and no climbers or wires in the flight path. Fit it under the eaves on a north or east wall.

βœ“ Swifts are Red-listed and return to the same site every year once they find it
βœ• Can take several seasons to attract a pair; playing swift calls nearby helps
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Where to put it

Height: 2 to 4 metres for tits and sparrows. Under 2 metres, in thick cover, for robins and wrens.
Direction: face the hole between north and east. That avoids strong sun and the wettest winds.
Angle: tilt the box forward slightly so rain runs off.
Spacing: keep it away from feeders. Busy feeders mean constant visitors and nesting birds do not settle.
When: put boxes up in autumn or winter. Birds roost in them through the cold and start prospecting from February.

What to avoid

Perches under the hole. Birds do not need them and predators use them.
Metal or thin plastic boxes. They overheat in sun and run with condensation.
Combined nest box and feeder. The feeding traffic drives nesting birds off.
Bright painted novelty boxes. Fine if the timber is thick and the hole is the right size. Most are neither.

Cleaning

Clean boxes out in autumn, once you are sure nesting has finished. Take out the old nest, pour in boiling water to kill parasites and let the box dry. Do not use insecticide or flea powder.

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