By the Home Lift Hub UK — Platform Lifts, Through-Floor Lifts & Elevator Guides Team · Updated May 2026 · Independent, reader-supported

Best Home Lifts for a Two-Storey Extension UK — Integration Guide

Adding a second storey to your home is a significant investment, and it's the perfect time to future-proof your property with a lift. Whether you're planning now for accessibility needs or building in flexibility for later years, integrating a lift during the extension stage is substantially easier—and cheaper—than retrofitting one afterwards. This guide covers the practical considerations for specifying the right lift system alongside your build.

Why Plan a Lift During Extension Design

The key advantage of installing a lift during an extension is space and cost. Building the lift shaft into your structural design means no retrofitting, no cutting through existing floors, and no compromising your layout later. You'll also avoid the disruption and expense of post-completion installation, which typically costs 20-30% more than integrated builds.

From a property perspective, a purpose-built lift adds genuine value. Unlike external ramps or stairlifts, an internal lift maintains your home's aesthetic and functionality. It's especially valuable if you plan to age in place or if mobility issues run in your family.

Through-Floor Lifts vs Platform Lifts

Through-floor lifts (also called home elevators) lower into a pit beneath the ground floor and rise through a shaft to the upper storey. They're compact—typically 1m × 1m—and feel like genuine elevators, accommodating a wheelchair or mobility scooter comfortably. Cost ranges from £20,000 to £35,000 fitted, depending on the model and number of stops.

The trade-off: you need a basement, cellar, or excavated pit. If your extension sits on a solid ground floor with no below-ground space, a through-floor lift isn't viable.

Platform lifts (or vertical platform lifts) mount directly on your stairs or alongside them. They're cheaper (typically £8,000–£15,000) and require minimal structural work—just a sturdy installation point. They're space-efficient and can be added to existing stairs without major redesign. However, they're narrower than through-floor lifts and slower, making them better suited to occasional use than daily reliance.

Structural and Planning Considerations

When designing your extension with the architect or structural engineer, brief them early on lift requirements. They'll need to factor in:

• Shaft dimensions and weight distribution – A through-floor lift needs solid foundations and a dedicated shaft running through multiple storeys. This affects internal layout and structural calculations.
• Load-bearing ceilings – Lifts exert significant downward force. Upper-floor joists and supports must be engineered accordingly.
• Building Regulations – Any lift installation requires Part M (accessibility) compliance and electrical certification. This isn't optional; Building Control will inspect it. An architect familiar with lift integration will anticipate these requirements.
• Machine room space – Older hydraulic through-floor lifts need a small machine room (roughly 1.5m × 1.5m) adjacent to the shaft. Modern electric models are more compact.

Involving a specialist lift supplier at the design stage is worth the early consultation. Most offer free site reviews and can advise on feasibility before you're committed to a structural design.

Integrating During the Build

The best time to install is after the structure is weather-tight but before finishes. This means:

• The shaft is structural and accessible
• Electrical and water services can be planned around it
• You're not cutting into decorated walls or new flooring
• Snagging issues can be addressed as part of the main build

Coordinate closely with your main contractor. The lift company will typically need 2-3 weeks on-site for installation, testing, and certification. Plan this into your build schedule so it doesn't clash critically with other trades.

Space Planning Tips

For a typical two-storey extension, a through-floor lift works best if you can allocate:

• Ground floor: the 1m × 1m shaft footprint (roughly the size of a generous cupboard)
• First floor: a similar shaft opening, ideally aligned vertically
• A circulation space of at least 1.5m in front of the doors for safe access

If space is tight, a platform lift can sit on your new staircase, saving the dedicated shaft space. You lose some accessibility for wheelchairs, but you gain flexibility.

Electrical and Ongoing Costs

All lifts require a dedicated electrical supply. An electrician will need to run a separate circuit—usually 32-63 amps depending on the model. Budget for this in your electrical planning; it's roughly £1,000–£2,000 as part of the main extension wiring.

Annual servicing (mandatory for safety compliance) costs £300–£600 per year. Spares and repairs are generally available and reasonable, especially for well-established brands like Stannah, ThyssenKrupp, and Cibes.

Specifying Your Lift

When you're ready to choose, get at least three quotations from installers. Ask for:

• Compliance with Building Regulations and BS EN 81 standards
• Full fitted costs (not base unit prices)
• Maintenance contracts and what's covered
• Lead times (currently 8-12 weeks for many suppliers)
• Warranty terms (5-10 years is standard)

Don't be tempted by suspiciously cheap imports. Lifts are safety-critical, and support, spares, and certification matter far more than saving a few thousand pounds upfront.

The Bottom Line

Installing a lift during a two-storey extension is the smart time to do it. You'll integrate it properly, avoid expensive retrofitting, and create a home that works for all stages of life. Start the conversation with your architect early, involve a specialist supplier in the design phase, and coordinate it carefully during the build. The investment pays for itself in peace of mind and property value.