
Family run builders, established in 1988
Builders in Ruislip for extensions, loft conversions and renovations
Family run since 1988, serving West London and South Bucks. Around 85% of our work comes from recommendation.
Or call Karl on 07850 623490- Family run since 1988
- NHBC registered
- Guild of Master Craftsmen
- £5m public liability
- Based in Ruislip
Our recent work
Our recent work
A look at some of our latest projects, from rear extensions to a village hall rebuild.












Get your personalised quote
Two quick steps. Free and no obligation.
What would you like to have built?
Our core services
Our core services, starting with house extensions
Extensions, loft and garage conversions, built by our own experienced tradesmen and managed by one family firm.
House extensions
Single and double storey, rear and side extensions that add real space to your home.
Learn moreLoft conversions
Turn unused roof space into a bedroom, office or en suite with a well built loft conversion.
Learn moreAlso built from our Ruislip base: brickwork specialist, home refurbishments and renovations, new build homes and developments and kitchens and bathrooms.
Local pages: builders in Ruislip and Hillingdon and builders in Gerrards Cross and South Bucks.
Our work
Real projects from our portfolio
A few of the homes we have extended, renovated and built.



Why choose us
Why homeowners trust L and K Builders
When you choose us, you are choosing a family firm that has built its name on recommendation.
- Free site surveys and quotes
- All tradesmen health and safety trained
- Waste recycled, Environment Agency registered
- References available on request
Family run
Established in 1988 by Karl Long
Fully insured
£5m public, £10m employers liability
Accredited
NHBC, Guild of Master Craftsmen, CITB, SafeContractor
Recommended
Around 85% of work from recommendation
More services
More ways we can help
We do not just build extensions. We also take on conversions, renovations and complete new homes.

Brickwork specialist
Brickwork, repointing and repairs, from extensions and new builds to garden and boundary walls.
Learn more
Home refurbishments and renovations
Complete renovations, from period property restorations to modern refits.
Learn more
New build homes and developments
Planning, design, project management and full construction of new homes.
Learn more
Kitchens and bathrooms
Bespoke kitchens and bathrooms, fitted and finished by our own tradesmen.
Learn more1988
Year established
85%
Work from recommendation
Free
Quotes and site surveys
Ruislip
Serving West London and South Bucks
How we work
What to expect working with us
Clear communication, a clear quote and one family firm from start to finish.
- 1
Get in touch
Call, email or send an enquiry about your project
- 2
Free site survey
Karl visits, listens and talks through what is possible
- 3
Written quote
A clear quotation and schedule of works
- 4
The build
Our own tradesmen, a tidy and safe site
- 5
Handover
Building control sign off and a finished home
FAQs
Common questions
Quick answers to the questions we are asked most.
Do you offer free quotes?+
Yes. We provide free, no obligation quotes and site surveys. Call Karl on 07850 623490 or send an enquiry using the form.
Do I need planning permission for an extension or loft conversion?+
Many single storey extensions and loft conversions fall under permitted development, while larger schemes and homes in conservation areas need planning permission. We will advise on the likely route during the free site survey.
Which areas do you cover?+
We are based in Ruislip and work across Hillingdon, Harrow and Three Rivers, including Eastcote, Ickenham, Northwood, Pinner, Uxbridge and Rickmansworth, as well as Gerrards Cross, the Chalfonts, Beaconsfield and Amersham.
Are you insured and accredited?+
Yes. We are members of the NHBC and the Guild of Master Craftsmen, CITB trained and SafeContractor accredited, with £5 million public liability and £10 million employers liability insurance.
Can I see examples of your work?+
Yes. Browse our work online, and references and a portfolio of past work are available on request.
Karl Long established L and K Builders in 1988. More than three decades on, we are still family run, and some customers have used us for over 20 years.
A commitment to every customer
Safe, tidy sites
SafeContractor accredited, with all tradesmen health and safety trained.
Responsible waste
Registered with the Environment Agency, with waste recycled wherever possible.
Properly insured
£5 million public liability and £10 million employers liability insurance.
Clear quotes
Free site surveys and clear written quotes.
Areas we cover
Where we work
Based at 8 Manor Road, Ruislip, serving North West London and South Bucks.
Ruislip and surrounding areas
Hillingdon, Harrow, Three Rivers and Buckinghamshire
West London and Hillingdon
- Ruislip
- Eastcote
- Ickenham
- Northwood
- Pinner
- Harefield
- Uxbridge
- Harrow
- Northolt
- Rickmansworth
South Bucks
- Gerrards Cross
- Chalfont St Peter
- Chalfont St Giles
- Beaconsfield
- Amersham
Explore our services
Ready to plan your project?
Get in touch today for a free, no obligation quote and site survey.
No pressure, just clear advice from a family builder.

