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Planning Consultant: Do You Need One for Your Home?
BeforeBricks Marketing Team
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A planning consultant advises on whether a project is likely to get planning permission, shapes the proposal around local policy and prepares and manages the application with the council. Most homeowners with a straightforward extension or loft do not need a separate consultant on top of a good designer who handles the application. You are more likely to benefit from one when the outcome is uncertain: a conservation area, a previous refusal, a change of use or anything that turns on how the council reads its local plan.
Below we explain what a planning consultant does, when one is worth it, how to check their credentials and the questions we would ask before hiring anyone, including us.
What does a planning consultant do?
The Royal Town Planning Institute (RTPI) describes planners as people who recommend where and how buildings should go, what they should be used for and how they should fit their surroundings. They prepare and assess planning applications, present proposals to committees and consult architects and local residents. Planners work in councils and government, but also in private consultancies, which is where the term planning consultant usually comes from.
The Planning Portal lists the typical work as applications, appeals, impact and feasibility studies, research, and urban and rural design. For a homeowner, that usually means:
- Reading the council's local plan and design guidance and telling you honestly how your idea is likely to be received.
- Suggesting changes to the design that make it easier for the council to approve.
- Writing the planning statement that explains why the proposal meets policy.
- Submitting the application and dealing with the planning officer while it is decided.
- Advising on an appeal or a fresh application if permission is refused.
A consultant cannot guarantee approval. The decision belongs to the council, and anyone who promises you a yes is overselling.
Do I need a planning consultant for an extension or loft?
Often not as a separate appointment. Many home projects either fall within permitted development, where a lawful development certificate gives you written confirmation, or are routine householder applications where good drawings and a clear description do most of the work.
A recent example: in January 2026 Arun District Council granted a lawful development certificate for a loft conversion we drew, with a rear dormer and front rooflights, in the South Bersted area of Bognor Regis. The council confirmed the work was permitted development under Classes B and C. The work there was in drawing the scheme accurately within the permitted development limits, not in a policy argument.
When a planning consultant is worth it
The Planning Portal suggests using a consultant when permission is unlikely to be straightforward, especially where it depends on interpreting planning policy and local development plans. It also advises getting help early, because a refused application is much harder to turn into an approval later. In practice we would think seriously about specialist planning input if:
- The property is listed or in a conservation area.
- You have already been refused, or a similar scheme nearby was refused.
- You want to change the use of a building, for example a shop to a different business or an outbuilding to living space.
- You are building a new home or dividing a plot.
- The site is in the Green Belt or another protected area.
- Neighbours or the parish council are likely to object and the application may go to committee.
Planning consultant or architect: who should you hire?
Some homeowners tell us their council suggested they speak to a planning consultant. It helps to know how that role differs from the person who draws your plans. The two overlap but are not the same:
- A designer or architect produces the drawings: existing and proposed plans, elevations, sections and the site and block plans the council asks for. See our guide to planning drawings and building regulations drawings.
- A planning consultant focuses on policy and the case for approval: the planning statement, negotiation with the officer and appeals.
The Planning Portal suggests going to your architect on design questions, but not assuming an architect can handle a complex planning case. For many homeowners the practical answer is a team that does both, so the design and the planning case are worked out together rather than handed between two firms. That is how we work at BeforeBricks: the same team draws the scheme, prepares the supporting documents and submits the application.
Our St Albans front dormer case study shows why this matters. An earlier application had been refused in June 2024 over the size of the dormer and a Juliet balcony. After pre-application advice from the council, the dormer was reduced, the balcony was dropped and the scheme was approved in December 2024. The design changes and the planning argument went together.
How to check a planning consultant
Anyone can call themselves a planning consultant. The Planning Portal recommends choosing a chartered member of the RTPI, which it says is the only UK organisation that can grant chartered status to planners, and notes that members must follow a code of conduct. The RTPI's directory of planning consultants lists chartered members and legal associates who offer services commercially.
Before you hire anyone, ask:
- Who will actually do the work, and what are their qualifications?
- Have they dealt with your council and your type of project before?
- What exactly is included: drawings, planning statement, submission, responding to the officer, amendments?
- Are council application fees included in the quote or paid separately?
- What happens if the council asks for changes, or refuses?
Should I get pre-application advice first?
Sometimes. GOV.UK guidance says pre-application engagement can help you understand the relevant policies, spot issues early and identify the information the council will need, which can reduce delays at validation. Councils can charge for it, though they are encouraged to offer at least a basic level of service free. It is most useful on the harder cases listed above.
How long does it take?
A consultant cannot speed up the council's clock. Under GOV.UK guidance, councils have 8 weeks to decide most applications and 13 weeks for major development, unless you agree an extension of time in writing. What good preparation can do is reduce the risk of the application being returned as invalid or refused. Read more in how long a planning application takes.
Not sure if you need one?
If you are unsure whether your project needs a planning consultant, a designer or both, we are happy to talk it through. Book a free advice call and we will give you an honest view of the planning route for your home.
