Who Writes Your Certification Submission? In-House vs. Consultant vs. Drafted for You

Quick answer: There are three ways to get a certification submission written: your own team does it, you retain a consultant to do all of it, or you buy a drafted report and supply your building’s measured data. In-house is cheapest in cash and most expensive in senior time. Full consulting is right for complex new-build projects with design decisions still in play. A drafted report fits the large middle case — an existing building with real performance that simply needs documenting properly.

Nobody chooses a resourcing model on the merits. They default to whatever they did last time, or to whichever vendor emailed them in the right week. Then the sunk cost sets in. Since this decision determines both the cost and the calendar of the entire certification, it deserves twenty minutes of actual thought.

Here is the honest comparison, including the cases where you should not buy anything from us.

The three routes

In-house. A sustainability manager, facilities lead, or ESG analyst reads the manual and assembles the submission. Cash cost is near zero. The real cost is that a senior person spends weeks becoming a temporary expert in a rulebook they will use once, then loses that knowledge before the recertification cycle comes round.

Full consultant. You retain a firm that manages the whole process — often from design stage — attends the charrettes, models the options, writes the submission, and handles review correspondence. You buy expertise and accountability, priced accordingly.

Drafted report. The credit-by-credit requirements, thresholds and recommended approaches are researched and drafted against the authority’s current manual, then reviewed by a specialist. You supply your building’s measured inputs. You submit.

Side-by-side

	In-house	Full consultant	Drafted report
Who learns the rulebook	Your team, from scratch	The consultant	Already done for you
Who supplies measured data	You	You	You
Who influences design	You	The consultant	Nobody — building is as-built
Cost shape	Senior salary time	Retainer / project fee	Fixed price (contribution) or quoted (full scorecard)
Speed to first draft	Weeks of reading	Scoped engagement	Minutes
Where version risk sits	With you	With the consultant	Validated against the live manual
Best fit	Simple, repeat, in-house expertise exists	Complex new-build, design in play	Existing building, real performance, needs documenting

When in-house genuinely wins

If you have a sustainability lead who has already run this exact certification, at this version, on a comparable asset — let them. The rulebook knowledge is already paid for, and a second run is dramatically cheaper than the first. This is a real scenario and we will not pretend otherwise.

It stops being true the moment the version moves. Credit counts, point values and category structures are version- and typology-specific, and the editions turn over. Last cycle’s knowledge is a starting point, not an answer.

When a full consultant genuinely wins

If the building is not built yet, hire the consultant.

When design decisions are still live, the value is not in the documentation — it is in someone shaping the glazing spec, the mechanical strategy and the site plan toward the credits before the concrete is poured. No report, however well drafted, can retrofit a decision that has already been made. Complex new construction chasing a high certification level is consulting work, and we would tell you the same on a call.

When a drafted report genuinely wins

The middle case is the biggest one, and it is the worst served.

You have an existing building. It performs — there is a green roof, or a farm, or a genuinely efficient plant — and that performance is currently earning you nothing because it is not documented against a standard. There are no design decisions left to influence. You do not need a strategist; you need the rulebook applied to the building you already have.

This is also the recertification case. You were certified in, say, 2021. You still qualify — being certified proves it — but the standard has moved and the evidence needs restating against the current edition. That is documentation work, not strategy work, and paying strategy rates for it is how certification budgets quietly disappear.

The tell is simple: if the answer to “what should we change about the building?” is “nothing,” you do not need a consultant. You need the report.

How to decide

Three questions, in order:

1. Is the building already built and operating? No → consultant. Yes → keep going.
2. Has your team run this exact certification, at this version, before? Yes → in-house is viable. No → keep going.
3. Is there real performance on site that is not yet documented? Yes → a drafted report is the efficient route.

If you land on the third: answer eight questions about your building and you will see which of the 17 certifications and disclosure frameworks it qualifies for, and what each report covers, before you spend anything. No account needed to look.

See what your building unlocks →

If you are at design stage, or you want someone to shape the strategy rather than document it, talk to our team instead — that is a different conversation and we would rather have the right one. For the wider reporting picture, see our pillar guide to ESG-aligned urban farming.