The Co-Agency Listing: How Two Agents Should Coordinate Marketing When a Vendor Lists With Both

29 September 2026·6 min read

Quick answer: When a vendor lists with two agents under a co-agency (or conjunction) agreement, marketing only works if both agencies agree in writing on who owns which channels, what the shared brand story is, and how leads get split and logged before the campaign goes live. Without that upfront agreement, you end up with duplicate listings, mismatched photography, and two agents quietly competing for the same buyer enquiry instead of pooling their networks. A simple one-page coordination brief, signed by both agencies before launch, fixes almost all of it. 🚀

Co-agency listings sound simple in theory — two agencies, double the buyer network, faster sale. In practice, we've seen them turn into a mess of duplicate Domain listings with different photos, two Facebook posts competing for the same comments, and vendors quietly wondering why "their" agents seem to be working against each other instead of together. 💖 The properties themselves aren't the problem. The problem is that almost nobody writes down how the marketing is actually going to be coordinated before the campaign starts.

What most agencies get wrong

Co-agency marketing usually breaks down for one of three avoidable reasons:

No single source of truth for the listing. Each agency uploads its own version to the portals — sometimes with different price guides, different photo selections, even different descriptions — and buyers notice the inconsistency before they've even called.
No agreed split of who does what. Photography, floor plans, signboards, social posts, print ads — if it isn't assigned to one agency (or explicitly shared), it either gets duplicated at double the cost or dropped entirely because each side assumed the other was handling it.
No agreed lead-handling process. Enquiries need to be logged and shared fairly, or one agency starts to feel like it's doing the marketing while the other is fielding all the easy walk-up buyers.

The vendor rarely sees any of this directly — what they see is a campaign that feels disjointed, and two agents who seem to need constant refereeing. That's the opposite of the "working together for you" pitch that got the co-agency agreed to in the first place.

The co-agency coordination brief: a usable template

Before the campaign launches, both agencies fill out and sign this one-page brief:

1. Listing ownership
Which agency's listing is the "master" on each portal (Domain, realestate.com.au)? Agree who uploads first and who links or co-lists as the second agent, so there's one price guide, one set of photos, one description.

2. Asset ownership
Who commissions and pays for photography, floor plans, drone/3D tours, and copywriting? Agree this is done once, by one agency, and shared — never duplicated.

3. Channel split
List each channel (signboard, social media, email database, print, portals) and write one agency's name next to each — or "shared" if genuinely co-posted, with an agreed posting schedule so both aren't publishing the same content on the same day.

4. Brand voice agreement
Agree on one consistent headline and key selling points both agencies will use across all their own marketing, so buyers see one coherent story rather than two competing pitches.

5. Lead logging and split
Every enquiry gets logged in a shared spreadsheet or the vendor's CRM within 24 hours, noting which agency received it and how it was actioned. Agree upfront how commission splits on a co-agency sale.

6. Vendor reporting cadence
Agree who sends the (single, combined) weekly update to the vendor — never two separate reports that might disagree with each other.

Two independent boutique agencies, conjunction on a family home: Before using a coordination brief, each agency had run its own photography, resulting in two different hero images across portals. After agreeing Agency A would commission one shoot and share the full gallery, both listings finally matched — and the vendor stopped fielding confused questions from friends about "which listing is the real one."

Franchise office conjuncting with an independent agency: The franchise office wanted to run its usual social media cadence; the independent agency relied more on its email database. Rather than compete for the same audience, they split channels explicitly — franchise handled social and portals, independent handled database and its walk-in network — and reported combined enquiry numbers to the vendor each week.

Two agencies with overlapping buyer databases: Both agencies wanted to email their database about the same property, risking the same buyers receiving two different emails. They agreed on one shared email template both databases would receive, sent on the same day, avoiding duplicate (and mismatched) messaging landing in the same inbox from two different agents.

How to run the coordination in practice

Step 1 — Hold a 20-minute kickoff call before any marketing is briefed, ideally with the vendor's awareness that this call is happening. This is where the brief above gets filled in together, not emailed back and forth.
Step 2 — Appoint one point of contact per agency for marketing decisions, so approvals (like a change to the price guide or a new photo) don't require chasing four different people.
Step 3 — Use one shared folder (Dropbox, Google Drive, or your portal's own asset library) for all approved photography, copy and floor plans, so neither agency is working from an outdated version.
Step 4 — Set a recurring 10-minute check-in (weekly is usually enough) to compare enquiry numbers and flag anything that's drifted from the brief.
Step 5 — Send the vendor one combined report, ideally co-branded or at minimum cross-checked by both agencies before it goes out, so the numbers always match.

💡 Put the coordination brief in front of the vendor too. A one-line summary — "here's how we're splitting the marketing so nothing's duplicated and every enquiry is tracked" — reassures a vendor who agreed to co-agency because they were worried about exactly this kind of confusion.

Mistakes to avoid

Don't leave "shared" channels vague. "Shared" without a schedule usually means either double-posting or nobody posting — assign specific dates or specific pieces of content to each agency even within a shared channel.
Don't skip the written agreement because "we've worked together before." Even agencies with a good relationship drift on the details listing to listing; write it down every time.
Don't let lead logging happen informally by text message. A missed or late-logged enquiry is the single biggest source of vendor frustration and interagency friction on a co-agency listing.
Don't assume commission split conversations are separate from marketing coordination. They're related — agencies that feel underpaid for their marketing effort tend to quietly under-invest in it, so get both agreed together.

Frequently asked questions

Who should pay for professional photography on a co-agency listing?

Most commonly it's split evenly or covered by whichever agency has the existing supplier relationship and simply invoices the other for half. The key isn't who pays — it's that it's commissioned once and both agencies use the same set, rather than each running their own shoot.

Can both agencies run paid social ads on the same listing?

They can, but it's worth being honest that running two separate ad campaigns on the same property often means you're bidding against each other for the same audience, which can push costs up for both agencies without adding much extra reach. Coordinating one paid campaign (or clearly splitting by platform, e.g. one agency on Meta, the other on Google) is usually the smarter spend.

What happens if one agency isn't holding up their end of the coordination brief?

Raise it directly and early, referencing the brief you both signed — that's exactly what it's there for. If it continues, loop the vendor in at a high level ("we want to make sure marketing stays consistent, so we're addressing a scheduling gap with the other office") rather than letting the vendor discover the disjointedness themselves.

Does a co-agency listing need a different landing page or is the portal listing enough?

For most residential co-agency listings, consistent portal listings plus signboard and social are enough — you don't necessarily need a dedicated landing page. It becomes worth building one when the property is higher-value, off-market, or benefits from a combined agent bio and shared testimonials that a portal listing can't show.

Keep reading 🤍

Written by

Kate, founder of Chronically Online

I help Gold Coast and Brisbane businesses grow with branding, websites and marketing that actually works.

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