Christmas Lights on a House: Ideas, Fixings & Costs

The best Christmas lights on a house do not look like decorations — they look like the house was drawn that way. The difference is hierarchy: one line first, then one colour, then one timer.

The order that works

Most houses are over-lit because the owner bought a bit of everything. Start here instead:

1. 1Roofline — eaves, verges and the gable triangle. This is the silhouette.
2. 2Windows — frames or bay heads only. They add depth behind the roofline.
3. 3Door or porch — a single lit wreath or a short canopy run.
4. 4Trees and planting — one well-lit specimen beats four half-lit shrubs.

A house with only a roofline can look beautiful. A house with every surface lit rarely does.

Picking the right lights

For a house exterior you want:

• LED, not filament. LEDs use a fraction of the power and last years longer.
• Warm white 2200K. It flatters brick, stone, render and timber at dusk. Cool white makes a period house look clinical.
• Rubber cable with sealed connectors. Cheap PVC cable goes stiff and cracks in frost; the join is where water gets in.
• Around 100 LEDs per metre. Below 60 the line looks dotted, not drawn.
• One transformer and one timer. Multiple timers mean half the house is on while the other half is off.

Fixings that respect the house

The right fixing depends on the surface, its condition and the exposure, and that is judged on site, not from a photo. The rules that never change: nothing through the cable, no staples or nails, and the house should look exactly the same after take-down. Non-invasive runs are more vulnerable to storm gusts, winter winds and heavy rain, which is why they are checked through the season.

Power

An outdoor socket is ideal. If you do not have one, the safest route is a weatherproof cable run from an indoor socket through a window or door frame, sealed with a brush strip. Extension leads left on the lawn are the single most common reason we get called out to a failed display.

What a professional install costs

A professional seasonal installation in London and the South East starts at £1,500; fuller residential displays typically sit at £2,500–£5,000. The fitted price includes design, commercial-grade LEDs, clips, timers, fitting, first-season repairs and an itemised January take-down. Lighting is normally supplied on seasonal hire, and a purchase option is available if you would rather own it.

If you are doing it yourself, budget £150–£400 for good-quality lights and a timer for a semi-detached roofline.