Jeroen Janssen
Approach · XD — Experience Diagnostic

Underwriting models the building. XD models the life inside it.

A four-to-six week diagnostic for investors, BTR funds and family offices. It assesses whether the systems around a place can carry the hold-period model the capital was committed to — before the model meets the resident.

Now · June 2026 Living Hub at Provada — RAI Amsterdam, 9–11 June, Stand 12.26 What's moving
00 / Stakes

The model is signed off in a quarter. The lived reality is held for a decade.

Between handover and exit is the period nobody underwrites. It is also the period the entire return depends on.

Investment Committees can model lease-up. They can model rent growth. They can model exit cap. What they cannot model is the lived experience the building has to deliver to make those numbers true — because the lived experience has not been built yet, and the people who will build it are not always the people who signed the deal.

That gap is where return is lost. Not in the brochure. Not in the model. In the decade between them.

The visible bill

The NOI catches up later.

Turnover above underwriting. Lease-up that slows on the next phase because the first one quietly broke its own promise. Common areas the operating budget cannot keep alive. Exit values pinned to a hold the lived reality never delivered.

The earlier bill

People do not live well here.

Sleep that does not come back. Recovery postponed for years. Older neighbours who quietly stop coming downstairs. Families that never form because no one designed the social geometry. A building can sit at full occupancy and still fail.

Both bills land. The financial one is the one the IC sees. The earlier one is the cause it never gets traced back to.

The decade nobody underwrites — where return actually disperses.

  • Underwriting model — assumed NOI trajectory
  • Lived reality — no diagnostic, no intervention
  • Lived reality — with XD intervention at year 0
0 25 50 75 100 Indexed cumulative NOI 0 2 4 6 8 10 Years from handover Handover Exit return dispersion

Indicative. Underwriting models assume linear stabilisation. Lived-reality drag — turnover, common-area decay, programme-mix friction — compounds asymmetrically and shows up in NOI 24–36 months after the cause. Earlier the diagnostic, narrower the gap.

Housing is not real estate. It is infrastructure for human life. Capital that treats it as the first underwrites half the asset. The other half is the system around it — and that half is what XD examines.

02 / The diagnostic

Four systems. One lived reality.

XD reads a project across four systems in this order. Under-performance almost never sits in one — it sits in the way they fail to align.

01 Organisational

Who decides, who pays, who lives with it. Most under-performance starts in the org chart, not the building. Decision rights and accountability before anything else.

02 Spatial

The environments people actually operate inside. Plans get drawn for opening day. Lived experience demands they hold under daily, decade-long use.

03 Behavioural

How people live, decide, recover, perform. The lived reality the rest of the system has to serve. If the model can't be lived, the model is the bug.

04 Capital

How returns are modelled, on what horizon. Hold periods that ignore lived experience destroy long-term value. Capital design and life design are the same problem.

03 / What it produces

Not a report. A position.

XD delivers what an IC member, a fund partner or a family principal can act on directly. Three things, every time.

Output 01

The risk read

Where the hold-period model is exposed and what the lived-reality failure mode looks like — concretely enough to underwrite or walk away from.

Output 02

The intervention set

Two to four changes — in programme, operator selection, organisational design or capital structure — that move the risk before commitments harden.

Output 03

The memo

What to commit to, what to renegotiate, what to walk away from — written as something an IC can act on directly. Positional, not informational. Lands on the right desk in the same week.

04 / When it fits

It works best before commitments harden.

XD is a pre-investment instrument. It is most useful when there is still capital room and contractual room to move.

Fits

Pre-acquisition diagnostic before IC commitment. Pre-development read on a project the fund is sponsoring. Pre-opening review on a BTR or coliving asset entering the first lease-up. Standing read across a portfolio with concentrated residential exposure.

Doesn't fit

Projects where the structure is up and the operator is signed and the question is how to write a defensible memo for the file. XD is not a sign-off instrument. It is a position instrument.

Next

Send the brief. I'll send a position.

2026 is closed to new engagements. Q1 2027 opens in October. Typical engagement is four to six weeks, fixed scope, single principal.

Or write directly: info@jeroen-janssen.com