What's inside
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A wooden bee hotel gives solitary bees a dry place to raise young, and it is a useful small woodworking project for a weekend. Unlike honeybees, most solitary bees do not live in a hive or produce surplus honey. Mason bees, leafcutter bees, and similar species use individual nesting holes, sealing each egg chamber with mud, leaves, or plant fibers.
The most practical design has a weatherproof wooden box and removable nesting tubes. Replaceable tubes make the hotel easier to clean and let you remove occupied nests without cutting into the wood. That matters because old tubes can collect mold, mites, and parasites.
Contents
Materials and tools
For a compact hotel about 12 inches wide, 14 inches tall, and 6 inches deep, gather the following:
- One untreated cedar board, approximately 1 inch thick by 6 inches wide by 6 feet long
- Exterior-grade plywood or cedar for the roof and back
- Paper nesting tubes, bamboo tubes, or cardboard bee-nesting liners
- Exterior screws, around 1-1/4 and 2 inches long
- Waterproof wood glue
- Exterior paint or finish for the outside only
- Drill, saw, tape measure, square, clamp, and sandpaper
Buying solitary bee nesting tubes is the simplest option if you want consistent sizes and clean replacements. You can also make liners from uncoated paper rolled around a dowel, but the seams need to be tight and the paper must stay dry.
Avoid pressure-treated lumber, pallet wood of unknown origin, and heavily aromatic or chemically treated offcuts. The bees will contact the nest material, and the box does not need to last forever. Cedar, cypress, or ordinary untreated softwood protected by a roof all work.
Choose the nesting tubes
Tube diameter determines which bees can use the hotel. A mixed selection is more useful than one large size.
| Tube inside diameter | Likely users | Practical notes |
|---|---|---|
| 3/32 to 1/8 inch | Small solitary bees | Useful in a mixed-size block; fewer commercial liners are available |
| 5/32 to 3/16 inch | Small mason bees | Good general-purpose range for many gardens |
| 1/4 inch | Larger mason and leafcutter bees | Can attract larger species, but may stay unused in some areas |
| 3/8 inch and larger | Some larger bees and wasps | Use sparingly; large openings are not automatically better |
Make the tubes at least 6 inches long, with one end closed. Bees typically build a series of chambers from the back toward the entrance. A tube shorter than 4 inches gives them less usable nesting space. Do not drill deep holes into a solid block unless you have a plan for removing and cleaning the nesting material; that is the main advantage of replaceable tubes.
Cut and assemble the box
Cut two side pieces 14 inches long, a top and bottom 12 inches long, and a back panel 12 by 14 inches. Cut the roof about 15 inches wide by 8 inches deep. The extra roof depth creates an overhang that keeps rain off the tube openings.
Dry-fit the four box pieces around the back. The interior depth should be at least 6 inches, but measure your tubes before cutting. If the tubes are 6 inches long, allow a little clearance rather than crushing them against the back panel.
Apply glue to the joints and fasten the box with exterior screws. Drill pilot holes near board ends to reduce splitting. Attach the back panel after checking that the box is square. A square box is not just cosmetic: crooked sides can pinch removable tube trays and leave gaps where wind-driven rain enters.
Add a simple sloped roof. A single piece of cedar or plywood with a front overhang of 2 to 3 inches is enough. Seal exposed plywood edges with exterior paint or an exterior wood sealer. Keep all finish away from the tubes and interior cavity.
Make the removable tube rack
The rack can be a shallow tray that slides into the box. Cut two rails from scrap wood and attach them to the inside walls, about 1 inch above the bottom. Make the tray approximately 1/8 inch narrower than the opening so seasonal wood movement does not jam it.
For a stronger arrangement, build three or four small trays, each holding 6 to 10 tubes. This limits damage when you remove an occupied section. A tray front with a finger hole or small pull makes servicing easier. Do not glue the tubes into place. They should slide out individually or lift out with the tray.
Line the back of each tube against a solid stop. Open-ended tubes allow wind, rain, and predators to reach the nest. If your purchased liners are open at both ends, cap the rear with a removable wooden strip or use a holder that closes one end without crushing the paper.
Protect and mount the hotel
Sand sharp edges, but do not heavily round the tube openings. Paint only the exterior surfaces, using a low-odor exterior coating. A natural wood finish is also fine if the roof is generous and the hotel can dry quickly. Low-VOC exterior wood paint is worth considering when the hotel will be close to a vegetable garden or patio.
Mount the hotel 3 to 6 feet above ground on a solid post, wall, or fence. Face the openings southeast or east where possible, so morning sun warms the nest while the structure avoids the harshest afternoon heat. Keep the tubes level or angled slightly downward, never pitched upward. An upward angle channels rain into the nest.
Place the hotel near bee-friendly flowers and a reliable source of mud. Mason bees may travel several hundred feet for food, but nearby flowers improve the chance that the hotel is used. Avoid placing it directly over sprinklers or in a location shaded and damp all day.
Seasonal maintenance and failure modes
In late fall or winter, remove occupied tubes and store them in a dry, unheated location protected from rodents. Follow local guidance for the bees in your area; some species should remain outdoors through winter. The key is to keep nests dry and cool rather than warm them indoors, where early emergence can leave bees without flowers.
Replace tubes that are moldy, crushed, or visibly infested. Never pressure-wash the box while tubes are installed. In spring, return healthy tubes before bees emerge. Clean empty trays with a dry brush or mild soap solution, then let them dry completely.
Common failures are easy to prevent: a shallow roof causes wet nests, large openings attract unwanted wasps, smooth plastic tubes trap condensation, and a solid drilled block cannot be properly cleaned. If you want the cheapest workable version, use an untreated scrap-wood box, paper liners, and a plywood roof. Spend money on replaceable tubes or tray hardware only if you value easy maintenance; the bees do not require an expensive enclosure.