
Thayer Street
Façade retention along Marylebone Lane with demolition of the existing building.

Landmark new-build, refurbishment and CAT A/B fit-out for the institutional London office market.
We have advised on more than two decades of London's defining office addresses — from façade-retained heritage refurbishments to 26-storey new-build towers. Our cost teams underwrite BREEAM Outstanding, WELL Platinum, SmartScore Platinum and WiredScore Gold targets without compromising commercial viability.

A representative cross-section of recent and ongoing schemes — more on request.

Façade retention along Marylebone Lane with demolition of the existing building.

Mixed-use refurbishment with five refurbished and two new floors.

Strip out with 9th-floor roof extension and atrium infill.

Four-storey alterations to commercial office plus a new floor.

Creation of a roof terrace and amenity space.

Modern office building with full-height atrium, large terraces, blue roof.

Category A fit out with new reception and lift replacement.

Seven-storey new build commercial office.

Cut-and-carve refurbishment including a CLT extension above the existing fabric — a low-embodied-carbon approach to bringing a heritage Bloomsbury address back into Grade A office use.

Grade II listed internal remodelling with two new floors.

EPC enhancement works delivered with tenants in occupation.

Restored and enhanced office space in Aldgate.

New horizontal extension across four floors.

Green roof, reception fit out, basement cycle storage.

One-acre rooftop urban forest of more than 100 trees.

Birmingham's tallest office building — a landmark 26-storey scheme with a signature rooftop restaurant overlooking Victoria Square.

BREEAM Outstanding vertical extension across four levels.

High-quality CAT B fit-out for a global trading client.

CAT B L1–L6 refurbishment with new roof terrace.

Occupied building upgrade lifting EPC to B.

Green roof and main reception fit out.

Seventh-floor extension with façade replacement.

14-storey new build commercial office in Paradise Circus.

City of London new build with retained core delivering 313,000 ft² of grade-A office accommodation across a sculpted glass tower.

Two additional office floors with roof terraces.

Two-storey CLT extension installed above the existing block.

Business park refurbishment and extension.

Four new build office buildings forming a city-scale quarter.

Demolition and three-storey new office for JP Morgan.

New build constructed to CAT B standard.

Grade B new build office construction.

Nine storeys above ground with two basement levels.

Retail, office and residential demolition and rebuild.

Central London façade retention project.

New build nine-storey mixed office and retail.

Commercial office refurbishment.

Seven-storey cut-and-carve refurbishment delivering 290,000 ft² of new global headquarters office space for WPP within the iconic Bracken House structure.

Refurbishment and extension to a historic professional address.

Headquarters office scheme.

CAT A refurbishment of a Grade B office.

Core re-configuration with full CAT A fit-out.

AJ 2013 winner — full CAT A fit-out.

Exposed services throughout — commercial office.

CAT A refurbishment with CLT extensions.

“AXA IM and The Crown Estate are among the institutions reshaping commercial office — Quantem's role is to underwrite the numbers behind it.”

CAT A and CAT B workplace delivery — from boutique floors to 370,000 ft² institutional schemes.

Tall buildings, BTR, mixed tenure and heritage — the country's most ambitious residential programmes.

Cluster, studio, listed and high-rise — purpose-built student schemes from 75 to 1,435 beds.

Flagship, big-box, market and airport — retail environments built for footfall and brand.
From RIBA 0 viability to final account — our partners are ready to take the call.