External rendering is applying a protective, weather-resistant coating to the outside walls of a house, using sand and cement, monocouche or thin-coat silicone render, to give a smooth or textured finish that protects the masonry and improves appearance.
Homes across County Londonderry vary a great deal, so we price external rendering only after seeing the property. Our coverage takes in Derry/Londonderry, Coleraine, Limavady and Magherafelt and the surrounding districts. As a guide, expect £6,000–£14,000 including VAT in Northern Ireland; the final figure depends on size, materials and access. Any permissions are checked against the rules for Northern Ireland before we quote.
- Guide price
- £6,000–£14,000 inc VAT
- Time on site
- 1–3 weeks on site, depending on weather
- Planning rules
- Northern Ireland
- Price level
- About 14% below the national guide
- Towns listed
- 4
- Survey
- Free, with a written quote
External rendering prices in County Londonderry
No two jobs cost exactly the same, but the ranges below give a fair picture of external rendering in County Londonderry. Pricing for Northern Ireland runs about 14% below the national guide, and the overall guide is £6,000–£14,000 with VAT included. We'll confirm your figure after surveying the property for free.
| Type of job | What it usually involves | Guide in County Londonderry |
|---|---|---|
| Front elevation or small terrace | One elevation or a small terraced house, including scaffolding and preparation. | £2,600–£6,000 |
| Typical semi-detached | All rendered walls of a 3-bed semi in monocouche or silicone, with scaffolding. | £6,000–£14,000 |
| Detached or full strip and re-render | Larger houses, or homes needing old render removed and walls repaired first. | £13,000–£26,000 |
Your price depends mostly on:
- Wall area to be rendered and the height of the house
- Render system: sand and cement, monocouche or silicone
- Removing old render or pebbledash and repairing the walls
- Detailing around windows, bays, sills and pipes
What do you get?
- Survey of walls, existing render, cracks and damp-proof course
- Scaffolding erected and removed, with neighbours' access agreed
- Removal of loose or failed render and pebbledash where needed
- Mesh reinforcement and base coats to suit the chosen system
- Finish coat in your chosen colour and texture
- Making good around pipes, vents and fixings, and a site clean-up
Housing across County Londonderry
Derry has Georgian and Victorian terraces around its walled city, alongside large post-war estates and newer developments. Coleraine, Limavady and Magherafelt mix older town centres with semis and estates, Portstewart has seaside villas, and rural areas have many detached homes and bungalows, often roughcast.
Terraces suit loft conversions and rear extensions, while rural bungalows commonly take extensions, loft rooms and driveways. Roughcast homes often need re-rendering, and coastal houses need roofline and window renewal.
The north coast faces Atlantic wind, rain and salt, and the Sperrins inland are colder and wetter.
Do you need permission in County Londonderry?
Because County Londonderry falls under Northern Ireland's rules, the guidance below is the version relevant to you. Before sending a price, we check your property's position with the council.
In Northern Ireland, re-rendering is usually treated as repair, but conservation areas and listed buildings are controlled.
Significant re-cladding or external insulation should be checked with building control under the Building Regulations (Northern Ireland).
Rules change and every property is different, so we check the planning history and constraints for your address before we quote.
How does the job run?
Survey and measure
It starts with a survey at the property, free of charge. We check condition, access and services, ask how you want the finished result to look, and answer any questions you have about external rendering.
Your fixed price
The quote arrives in writing, not over the phone. It covers the full scope, the finishes you've chosen, any exclusions and the payment schedule, with a fixed price tied to that specification.
Getting ready
Before anyone starts, we confirm the programme in writing, check whether consents are required and arrange deliveries. If a skip or scaffolding on the road needs a permit, we apply for it.
On site to finish
Work goes ahead as scheduled and you deal with one contact throughout. When the last trade leaves, we clear and clean the site, talk you through what has been done and pass on any certificates and care instructions.
How we work
Questions about external rendering in County Londonderry
How long will external rendering take?
On a typical home, allow 1–3 weeks on site, depending on weather. Larger projects, older buildings and extra work found once things are opened up can extend that, while simpler jobs may be shorter. Your quote includes an estimate of time on site, and your point of contact keeps you updated on the programme as the work progresses.
How do I look after silicone or monocouche render?
Through-coloured render needs little upkeep. Check it once a year for cracks or damage, especially around windows and pipes, and keep gutters clear so water does not run down the walls. If green algae appears on shaded walls, a specialist render cleaner applied with a soft brush or low-pressure wash removes it. Avoid high-pressure jet washing, which can damage the surface.
Can you render over pebbledash or old render?
Rendering over existing pebbledash or render is sometimes possible if it is firmly bonded, but if it sounds hollow, is cracked or is coming away, it must be removed first. Covering failing render simply hides the problem until the new coat fails too. We tap-test the walls and explain whether removal is needed. Removal adds time and cost but gives a sound base.
How much does it cost to render a house?
Rendering a typical 3-bed semi costs £6,000–£14,000, including scaffolding and preparation. As a guide, allow around £60–£120 per square metre of wall plus fixed costs for scaffolding and set-up. Sand and cement is the lowest-cost system, while silicone thin-coat costs more but needs no painting. Removing old render or pebbledash first adds noticeably to the price. We confirm a fixed figure after the survey.
Which postcodes in County Londonderry do you cover?
We cover BT48, BT52, BT49 and BT45, along with the rest of County Londonderry. If your postcode is not listed, get in touch anyway: our coverage is UK-wide, and we can usually arrange a survey wherever you live. Enter your postcode in the guide-price tool or contact form and we will confirm.
Towns in County Londonderry
Find your town below. Every place listed in County Londonderry is covered for external rendering, with the same survey, written quote and fixed-price process.