14 Foundry Lane, London EC2A 4DN Mon–Fri · 8:00 – 18:00
+44 20 7946 0814
Construction · Architecture · Since 1998

Dynamic solutions for your construction journey, ever.

We build with care, deliver on schedule and finish to a standard that holds. From heritage refurbishments to ground-up homes — three generations of craft, in one studio.

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CHAS / SafeContractor 10-year guarantee Fixed-price contracts
Construction site
25+
Years building
in London
RICS Awards Builder of the year · 2024
About Constructum
340+
Projects
delivered
About the studio

We've built since the 80's.

Three generations of bricklayers, joiners and architects working under one roof. We pair traditional trades with a modern delivery process so every project lands on time, on budget, and on standard.

Trades in-house

Directly employed teams — no subcontractor churn.

Design-build

Architecture and structural design under one team.

10-year guarantee

Structural workmanship covered well past handover.

Sustainable build

Sourced-local materials and low-carbon detailing.

Meet the team
What we do

Comprehensive construction
solutions for your vision today.

From the first sketch to the final coat, every trade under one roof — so you only have one number to call.

Residential Builds

Ground-up homes, extensions and renovations to RIBA standards.

Commercial Fit-out

Office, retail and hospitality fit-outs designed around your operations.

Loft & Extensions

Permitted-development lofts and rear or side extensions.

Bricklaying & Masonry

Hand-laid brick, stone and block work with a 10-year guarantee.

Heritage Restoration

Listed building works carried out with conservation-grade craft.

Project Management

Single-point-of-contact PMs running schedule, cost and quality.
Why Constructum

The advantages of our company are in the quality of our work.

  • 01

    Transparent fixed pricing

    Itemised quotes — what you sign is what you pay. No padded scopes, no surprise invoices.

  • 02

    Programme certainty

    Detailed Gantts and weekly client reporting. We hit handover dates 98% of the time.

  • 03

    Direct trades, no churn

    Bricklayers, joiners and finishers on PAYE — the same faces from foundation to snag-list.

  • 04

    Sustainability built-in

    Locally sourced materials, low-carbon detailing, and a clean site every Friday.

Construction in progress
98%
on-time
completion
Selected work

High-impact projects tailored to our clients.

More projects
Residential

Foundry Lane Townhouse
Rear extension

Albany Road Glass Box
Loft conversion

Hampstead Roof Suite
Process

Outlining the collaborative process to achieve your goals.

  1. 01

    Discovery & brief

    We walk the site, listen carefully, and shape the brief into a clear, costed scope.

  2. 02

    Design & pricing

    In-house architects produce drawings; we issue a fixed itemised quote within ten days.

  3. 03

    On-site delivery

    Directly employed trades run a clean, safe, well-programmed site with weekly reports.

  4. 04

    Handover & care

    Snag-list signed off, plus a 10-year structural guarantee for peace of mind.

Featured project

The greatest construction of the 21st century.

A two-year Hampstead rebuild combining heritage façade restoration with a full structural overhaul behind. Delivered three weeks early, on budget, and to a finish that exceeded the visualisation.

Location Hampstead, London
Duration 22 months
Value £3.8M
Recognition RICS shortlist
Read the case study
Constructum delivered our Hampstead refurbishment three weeks early, on budget, and the finish is better than the visuals we signed off. They are the rarest thing — a builder you can actually rely on.
EH
Eleanor Hartwell Private client · Hampstead
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Articles and posts filled with insight.

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