Do I need an architect for a garage conversion?

Author: Scotty Bradtke  |  Last update: Thursday, November 13, 2025

If your garage conversion involves complex designs or significant structural changes, hiring an architect is highly recommended. Architects can provide innovative solutions and ensure the project meets all safety standards.

Do you need an architect to convert a garage?

If your garage conversion requires planning, you will need architect drawings. But even if your plans fall under permitted development rights, architect drawings will be a useful blueprint for tradespeople to work from.

How much is an architect for a garage conversion?

Architect £700 - £2500

What's more, they take care of the planning, making sure your admin costs don't suffer from bad paperwork.

Can I convert a garage without planning permission?

Planning permission is not usually required to convert your garage into additional living space for your home, providing the work is internal and does not involve enlarging the building.

How much does an architect cost for a garage?

Architect plans are essential for a successful garage conversion. They ensure safety, compliance, and aesthetic integration with your existing home. While the initial cost, typically between $4,000 to $7,000, may seem steep, it can save you from potential headaches and add significant value to your property.

Do I Need Planning Permission for a Garage Conversion?

Do I need an architect for a garage?

If your garage conversion involves complex designs or significant structural changes, hiring an architect is highly recommended. Architects can provide innovative solutions and ensure the project meets all safety standards.

How much does it cost to get an architect to draw up plans?

As a basic rule of thumb for private residential projects, a residential architect typically charges between 10-15% of the construction cost for full architectural services. This can be reduced to 3.5% – 5.25% if you use your architect for the initial design stage only*.

Can I legally convert my garage into a room?

Since California has passed the new ADU laws this year, usable rooms like garage conversions can be used as a source of passive income. Even if you're only planning on converting the garage to an additional bedroom or home office, permits will be needed for residential construction.

How long does a garage conversion take?

On average, a garage conversion takes as little as 4-6 weeks. Compare this to a loft conversion (8-10 weeks) or rear extension (10-14 weeks) and you can appreciate why homeowners love how quickly this project can be turned around.

Do you need consent to convert a garage?

Building Consent

If you want to convert your garage to a bedroom, living room or media room, it will need to be re-classified from a non-habitable space to a habitable space. This requires a building consent.

How much should I pay for a garage conversion?

On average, a garage conversion costs between £18,000 and £28,300. Keep in mind that cost of labour is higher in London and the Southeast, sometimes by up to 20% on average. A garage conversion could add a lot of value to your home.

Is a building designer cheaper than an architect?

Cost Differences

Because of their extensive education and licensing requirements and the comprehensive scope of work they offer, hiring an architect costs more than hiring a designer.

Is it cheaper to convert a garage or build an extension?

Is it cheaper to convert a garage or build an extension? Garage conversions are almost always cheaper because all of the work happens internally. With an extension, you have to demolish walls and create a brand-new building from the ground up.

Can I draw my own plans for garage conversion?

Garage Conversion Building Regulations Drawings

Nearly all planned garage conversions require Building Regulations Approval. This approval is given by your Local Authority or an Approved Inspector.

Do I need an architect or just a builder?

That depends. If you're confident that you know what you're planning, don't need any help with the design and have found a builder you trust, you may be good to go. There's no law stating that you have to employ an architect. Some people undertake major works to their homes without using their services.

Can I put a window in my garage?

If you are happy with your current garage door, you can add windows to your existing door. If you want the natural light without sacrificing any privacy, have your windows installed on the top panel of your door.

Can you DIY garage conversion?

DIY garage conversions are generally less expensive than hiring professionals. You don't have to pay extra fees, but at the same time, you might not have the same smooth finish. Since DIY conversions are usually a first-time experience for everyone, you can expect some mishaps.

Is converting a garage a good idea?

Whether or not converting your garage is a good idea can depend on whether you're planning to stay in your home or want to sell soon. If you have no plans to move anytime in the near future, converting your garage into a more livable space can certainly add a great deal of personal enjoyment to your home.

Does garage conversion count as extension?

Class A (extensions) and Class E (outbuildings) are the relevant sections for garage conversions. If your garage is attached to your house, it will be considered an extension, and Class A will typically apply. The garage can be repurposed into living areas such as a living room, dining room, kitchen, or bedroom.

Do I need a permit to turn my garage into a room?

Because a renovation can disrupt electricity, power, or water lines. The Los Angeles building code for garage conversions matters a lot in obtaining a permit. That's why you need to obtain a building permit from the local Department of Building and Safety office and speak with the code official stationed there.

Do you have to raise the floor in a garage conversion?

It depends on your intentions. If you plan on permitting this as habitable and condition, then yes, the floor height has to be raised and match the finished floor height of the house. But, if your just going to make this a recreational room you do not have to raise the floor.

Do you need planning permission to put a toilet and shower in a garage?

If you're converting a non-residential space, like a loft or garage, into a bathroom, planning permission might be required. This is because you're changing the use of the space, which could impact the overall property.

Is it worth getting an architect for a renovation?

In many cases, contractors will be able to create plans that work, but their solutions and designs won't be as innovative or attractive as something an architect could come up with. If your remodel involves more than a simple project, we'd recommend at least consulting with an architect or draftsperson.

Can I draw my own architect plans?

It is highly recommended that you rely and defer to professionals and be open to your plans them being edited and redone. Unless you have extensive experience with architecture, engineering, construction or similar…. they will probably recommend some changes.

Previous article
Should radiant barrier go over or under insulation?
Next article
Can steam mopping replace regular mopping?