Dual Agency and Designated Agency: When One Firm Is on Both Sides of a Sale

At some point in most Massachusetts transactions an agent hands over a one-page form and asks for a signature before talking about a specific house. It is the state's mandatory relationship disclosure, and it exists because "who does this agent work for?" has a less obvious answer than people assume.

The question matters most when one brokerage ends up on both sides of the same sale. Massachusetts allows that in two forms, dual agency and designated agency, and both require the informed, written consent of buyer and seller. Before you sign either consent, understand what changes. Advice you would otherwise get becomes advice the agent is no longer allowed to give.

The relationship disclosure at the first meeting

Massachusetts regulations require a licensee to give a consumer the Massachusetts Mandatory Licensee-Consumer Relationship Disclosure at the first personal meeting at which a specific property is discussed, or before entering an agreement if there is no meeting in person. The form, published by the Board of Registration of Real Estate Brokers and Salespersons, describes the relationships an agent may have with you:

Seller's agent: represents the seller, owes them loyalty, and must still deal honestly with buyers.
Buyer's agent: represents the buyer, with the same duties running the other way.
Facilitator: helps with a transaction without representing either party.
Dual agent: represents both sides, with both sides' consent.
Designated agent: one of two agents within the same firm, each assigned to represent one side.

Signing the form acknowledges that you received it. It does not create a relationship or commit you to anything, though a buyer will now also be asked to sign a separate written agreement before touring. Buyer agency agreements covers that 2024 change.

Dual agency: one agent or one firm for both sides

In dual agency, the same agent, or the same firm acting as a single agent, represents buyer and seller in one transaction. It requires a separate written consent from both, and it changes the job.

A dual agent may not take one client's side against the other. In practice they cannot:

Advise the buyer how much to offer, or the seller whether to accept.
Tell the buyer the seller's bottom line or reasons for selling.
Tell the seller the buyer's maximum price or how much they love the house.
Argue either side's position in a negotiation.

What remains is closer to facilitation: paperwork, scheduling, information about the process, and honest answers to factual questions. Some transactions need nothing more. Most first-time buyers and many sellers need considerably more, and will not get it.

Designated agency: two agents, one firm

A brokerage with a designated agency policy can instead assign one of its agents to the seller and another to the buyer. Each designated agent represents their own client fully — advises on price, keeps confidences, negotiates — as though the other were at a different firm. The firm's managing broker, who supervises both, becomes the dual agent.

It works well where the firm keeps the two sides' information genuinely separate. It still requires written consent, and it is fair to ask how the firm keeps information apart: shared offices, shared transaction coordinators and shared team chats are where it leaks.

When it happens

The situations are predictable:

A buyer calls the listing agent directly about a house and has no agent of their own.
An in-house sale: a buyer working with one agent at a firm wants a house listed by another agent at the same firm.
A private or office-exclusive listing marketed only within the listing brokerage, where by design the buyer is likely to be another client of the same firm. Coming soon and off-market listings explains when those are allowed.
A team where both the listing agent and the buyer's agent work under one leader.

A buyer who talks to a listing agent without an agent of their own is, unless they agree otherwise, a customer, not a client. The listing agent must be honest with them, but represents the seller.

Questions to ask before you consent

Which arrangement is this, dual or designated, and who exactly represents me?
What will you not be able to do for me that you could do otherwise?
How will my information be kept from the other side?
Does the compensation change? A firm paid by both sides for one transaction should be able to say what it is doing differently for the fee.
What happens if I decline? Can I bring in another agent, and how is that handled?

Get the answers before an offer is on the table, not during one. The listing agreement is where a seller can state in advance whether they consent to dual or designated agency at all.

When to decline

Consent is optional, and declining is ordinary. Decline when:

You need advice on price, which is most of the time.
The negotiation is likely to be hard: an inspection with significant findings, a tight appraisal, a seller who needs a long closing.
You are a first-time buyer and want someone whose job is to argue your side.

A buyer can engage their own agent; a seller can ask the firm to refer the buyer elsewhere. Either side can also rely more heavily on their own attorney, which in Massachusetts they will have anyway. Choosing an agent covers what to ask of the one you hire.

The buyer's guide and seller's guide cover where representation fits in each sequence.

General information as of 2026, not legal advice. Agency relationships in Massachusetts are governed by M.G.L. c. 112, § 87AAA and the Board's regulations at 254 CMR; the current forms on mass.gov govern.