London Construction Est. 2009

Building London
with precision,
craft & conviction.

From heritage façades in Whitechapel to contemporary new-builds in Islington, Marion Construction UK Limited delivers architectural main-contracting and bespoke fit-out work for clients who refuse to compromise on detail.

15+
Years in London
240
Projects delivered
100%
In-house trades
CHAS
Accredited builder
What we do

A full scope of works, finished to one standard.

We run design, structure and finish under a single contract — so nothing falls between contractors, and nothing arrives on site that hasn't been specified, costed and signed off by our team.

01 / Service

Commercial & Residential Build

Main-contracting delivery for new-build residential, mixed-use developments and commercial fit-outs across Zones 1–3. Fully CDM 2015 compliant.

  • RC frame & structural steel
  • Envelope & cladding
  • MEP co-ordination
  • Section 106 & party wall
02 / Service

Heritage Restoration

Listed-building and conservation-area work for Grade II, II* and I properties. Lime, lead, sash, slate — done properly by tradesmen who've spent their lives on old London stock.

  • Listed building consent
  • Lime plaster & render
  • Sash window overhaul
  • Structural timber repair
03 / Service

Bespoke Fit-Out & Refurbishment

Architect-led refurbishments for penthouses, townhouses and headquarters. Joinery, marble, polished plaster and integrated smart-home systems installed by our specialist second-fix teams.

  • Architectural joinery
  • Stone & polished plaster
  • AV & smart home integration
  • Furniture, fixtures & equipment
Marion Construction site manager reviewing architectural blueprints on a London building site
Our Story

A London builder built on old-fashioned standards.

Marion Construction UK Limited was founded in 2009 on a simple principle: the drawing is the minimum, not the maximum. Fifteen years on, that principle still dictates every joint, every pour and every handover we sign off.

We hold ourselves to a standard that has largely disappeared from the London market — trades employed directly, contracts written in plain English, and programmes that account for weather, listed-building consent and the realities of delivering in a city that never stops moving.

Every project is run by a dedicated director from first survey to final snag. No project managers cycling between twelve sites. No sub-contractors hired on price alone. Just a tight team of forty-seven people who care more about the building than the margin.

James Marion
Founder & Managing Director
Selected Work

Recent commissions across the capital.

A small sample of projects delivered in the last eighteen months — from a timber-framed private home in Hampstead to a 40,000 sq ft Cat-A office refurbishment on the South Bank.

Restored Georgian townhouse facade with freshly pointed London stock brickwork
Spitalfields, E1
Georgian Terrace Restoration
Contemporary glass and steel office fit-out with double height atrium
Southwark, SE1
Riverside Commercial Fit-Out
Modern timber-clad residential extension with large glazed sliding doors
Hampstead, NW3
New-Build Family Home
Boutique hotel reception area with bespoke walnut joinery and warm lighting
Marylebone, W1
Boutique Hotel Refurbishment
How We Work

A process built for clarity.

Every Marion project follows the same disciplined sequence — so you always know what's happening, what's next, and what the cost impact of a decision will be before you make it.

01

Discovery & Feasibility

Site survey, structural feasibility, planning history and a realistic budget envelope before a single drawing is committed.

02

Design & Pre-Construction

We work alongside your architect and engineer, value-engineering the detail and pricing in the open — no hidden provisional sums.

03

Build & Programme

A dedicated contracts manager, weekly site minutes, fortnightly programme updates, and a single point of contact for the duration.

04

Handover & Aftercare

Twelve-month defect period, CP12 certification, and a written maintenance schedule for every element of the building.

Get In Touch

Tell us about your project.

We're taking on a limited number of new commissions for the coming quarter. Send a brief, give us a call, or arrange to meet the team at our Whitechapel office.

Telephone
Office
101 Whitechapel High St
London E1 7RA
Office Hours
Mon – Fri, 8:00 – 18:00

We aim to respond to all enquiries within one working day. Your details are never shared with third parties.