Planning a Glass Floor Project | Suitability & Requirements

Most people considering a glass floor hatch or walk-on panel have a genuine project in mind — a wine cellar they want to show off, a basement they want to connect to the floor above, or an existing lightwell opening they want to make usable. The good news is that the majority of these projects are more straightforward than they expect. This page covers the key things to check before you get too far into the process.

Important limitations to be aware of

Before going further, it's worth being clear about what our glass floor products are and aren't designed to do:

• Not insulated: The glass panels are not thermally insulated. If you have a cold basement or external void below, you may experience heat loss through the floor area.
• Not watertight: Our hatches and panels are not designed to be watertight. They are not suitable for situations where water ingress from below is a concern.
• Not fire rated: Our products are not fire-rated floor elements. If your project has fire compartmentation requirements, contact your building control officer before specifying a glass floor product — they will advise on what is required for your situation.

If any of these points raise concerns for your project, get in touch and we can discuss whether there's a workable solution, or advise accordingly.

Do you have the right kind of space?

Glass floor hatches and hinged cellar doors are designed for situations where there is a void, basement, cellar, or habitable lower level beneath the floor. The hatch sits in an opening in the upper floor and allows access — or simply light and visual connection — to the space below.

For a hinged door or hatch, you need:

• A floor structure with enough depth to accommodate the frame — our standard hinged hatches require approximately 200mm of floor depth; this can vary on the electric motorised version so confirm with us at enquiry stage
• A void below that is accessible and has enough clearance to be useful — most customers have an existing cellar or basement, though some commission a new excavation as part of a wider renovation
• A structural floor capable of carrying the unit and the loading it will see in use

Glass well covers are designed to cover existing wells — lightwells, area wells, basement passage openings, or similar below-ground voids where you want to allow light through while providing a safe, walkable surface above. They are typically made to custom sizes to suit the specific opening, although we do offer a selection of standard sizes online. We can supply different frame styles to suit various surrounds and finishes, and customers often send us photographs of the area when they're unsure which option will work best — we're happy to advise.

If you're unsure which product fits your situation, get in touch — it's the most common question we get and usually takes five minutes to work out.

Do you need planning permission?

For most projects, no. Fitting a glass floor hatch is an internal alteration and does not require planning permission. However there are two situations where you should check before proceeding:

• Listed buildings: Any alteration to a listed building — internal or external — requires listed building consent from your local planning authority. If your property is listed, speak to your LPA before ordering.
• Change of use: If your project involves converting a space from one use to another (for example, turning an uninhabitable basement into a habitable room), there may be planning considerations around the wider project, though not specifically around the glass floor unit itself.

In practice, the vast majority of our customers in standard residential properties proceed without any planning involvement whatsoever.

What about building regulations?

This is a slightly different question to planning permission, and worth separating out.

The glass floor unit itself — its load rating, glass specification, and non-slip treatment — is engineered to meet the relevant UK standards (BS EN 1991-1-1 for floor loading, BS EN 1090 for structural steel). You don't need a separate building regs application for the product.

However, if your project involves creating a new opening in an existing structural floor, that structural work (the trimmer joists, lintels, or concrete saw-cutting and reinforcement) will typically need to comply with building regulations, and you may need your builder to notify building control. This is standard practice for any structural alteration and is separate from the glass floor product. Your builder or structural engineer will advise on this.

If you have any questions about fire ratings, thermal performance, or watertightness in the context of building regulations, contact your building control officer directly — they are best placed to advise on your specific situation.

If you're simply fitting a hatch into a pre-existing opening — common in older properties with original cellar hatches — building regs involvement is usually minimal.

Structural requirements for the opening

Whatever the floor construction, the edges of the opening need to be solid, stable, and capable of carrying the fixing loads from the frame. Specifically:

• Timber floors: The opening needs to be properly trimmed with header joists and trimmer joists — standard carpentry practice when creating any opening in a timber floor. The trimmer arrangement needs to be sufficient for the span and the loads involved. A structural engineer can confirm this if there's any doubt.
• Concrete floors: The opening edges need to be sound concrete of adequate quality to take resin anchors. Crumbling, honeycombed, or poorly compacted concrete will need remediation before the frame can be fixed.
• The surrounding surface must be flat and level: This is critical. If the surface around the opening is uneven, the frame will not sit correctly, and the door will not operate properly. This must be resolved before the unit arrives on site.

We recommend that a structural engineer is consulted when creating new openings in structural floors, particularly in concrete. For existing openings in residential properties, a competent builder or joiner is typically sufficient.

Opening size and floor finish

We manufacture to your specified opening dimensions — there are no fixed standard sizes for hinged hatches, though we can advise on common configurations. When you place an order, we'll confirm the exact frame dimensions with you based on your opening.

• Finished floor level: The frame is designed to sit flush with your finished floor surface, not the subfloor. If you're tiling, laying engineered boards, or applying any finish around the hatch, the frame height needs to account for that thickness. Work this out before the frame is installed — adjusting afterwards is awkward.
• Floor finish sequencing: Don't lay your final floor finish right up to the opening edge before the frame is installed. Leave the area around the opening accessible until the frame is fixed, then bring the finish up to the frame edge as a final step.

What to tell your architect or builder

• The opening must be structurally trimmed and to the confirmed dimensions before the unit arrives — we cannot adjust the frame on site
• All fixing surfaces must be flat and perfectly level — this is non-negotiable for correct operation
• Allow for delivery access: the unit arrives as a single complete piece and needs to reach the room where it's being installed. Think about door widths, stairwells, and any tight corners on the delivery route
• The gas strut or electric mechanism is factory-set — do not disassemble it before installation
• Plan the glass floor into your project programme as early as possible — lead times are 6–12 weeks, and it cannot be retrofitted after floor finishes are complete

Lead times and project timing

• Hinged glass cellar doors (manual): 6–12 weeks from confirmed order
• Electric motorised hatches: 6–12 weeks from confirmed order
• Glass well covers: 4–8 weeks from confirmed order

We confirm the specification and dimensions at the point of order, and manufacture begins once that confirmation is in place. If you're working to a renovation programme, factor the glass floor in early — it's not something that can be ordered last-minute and delivered to site in a week.

Next steps

If you've read through this and your project looks feasible, have a look at our Pricing Guide to get a sense of budget, then get in touch to talk through your specific project. We're happy to have a no-obligation conversation at any stage — whether you're still in the early planning phase or ready to place an order.