Loft conversions, house extensions, renovations, basements and new builds across London and Hertfordshire.
Services
Loft conversions, house extensions, renovations, basements and new builds across London and Hertfordshire.
Services
Loft conversions, house extensions, renovations, basements and new builds across London and Hertfordshire.
Services
Loft conversions, house extensions, renovations, basements and new builds across London and Hertfordshire.
Services
Call 020 8037 7332 or get an instant estimate online.
Free consultation call
Every LCCL project starts the same way: a free 30-minute phone call with our team. No sales pitch and no obligation — just a clear conversation about what you want to build, what it is likely to cost and how the design and build process would run. Book your call or phone 020 8037 7332 (Mon–Sat 08:00–18:00).
What happens on the call
Before the call our team looks up your property and its planning context so the time is well spent.
We listen. You tell us what you want to achieve: the type of work (loft, extension, renovation, basement or new build), your priorities, your budget range and your timescales. The more you can share, the more useful our advice will be.
We advise. We explain whether the project is feasible, which route suits it — full design and build, architecture only, or project management — whether it is likely to fall under permitted development or need a planning application, and what a realistic programme looks like. We give you an initial cost range from our 2026 master price list.
We follow up. After the call we email a written initial estimate. If the project is a good fit we arrange a measured building survey and, where useful, a visit from our team. You choose when and whether to go further.
How to prepare
Have to hand a rough idea of the work, your budget range, your preferred timing, and any photos, measurements or existing drawings of your property. If you have used the instant estimate already, tell us the figure and we will start from there.
What the initial estimate is — and is not
The figure we give on or after the call is an estimate based on the information you provide and our experience of similar projects. It is not a quote: final costs depend on the detailed design, structural requirements, party wall matters and site conditions. Once your home has been surveyed and designed you receive a detailed itemised estimate, and the figure on that estimate is the figure you pay — nothing is added afterwards. We recommend holding a contingency on any building project.
After the call
The usual order is: consultation call → measured building survey → design and planning drawings → structural calculations and building regulations → build. The full sequence is explained on how a project runs.
Frequently asked questions
Is the call really free?
Yes, completely, with no obligation. It is how we find out whether we are the right team for your project, and how you find out the same.
Is it a video call?
No. Consultations are phone calls; our team calls you at the time you book.
Will I get a price on the call?
You will get an initial range during or shortly after the call, covering design and construction. A detailed itemised estimate follows the survey and design stage.
Can I book a site visit instead?
The first step is always the phone call; it lets us check feasibility and planning context before anyone travels. Where a visit is useful we arrange it after the call.
All estimates are indicative and subject to the final design, structural requirements, party wall agreements and building control assessment. LCCL Construction reserves the right to decline work at its discretion. By using our services you agree to our Terms and Conditions and Terms of Use.
“We are very happy with the services from Lccl, Alex has done a great job on design and construction. We have used Lccl in the past for our rear house extension and have come back to instruct Lccl for our loft conversion too to our house in North London.”
Mia M · Google Reviews
“The Lccl construction team built my extension with a quick and clean service, they worked non stop through the winter weather.. I would highly recommend this company!”
Chris Dunn · Google Reviews
“LCCL Construction was the right company to help with my loft conversion. I heard of other people's challenging experiences with building works so I was very careful which company I chose. LCCL Constructions was professional, trustworthy and worked to the…”
KashImaging · Trustpilot

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