Formby, L37, is a coastal Sefton town where most homes are post-war or later detached and semi-detached houses, many with attached or integral garages. Those garages are often converted into home offices, ground-floor bedrooms or annexes for a relative. Check with Sefton Council about planning first, especially on newer estates, and expect to need Building Regulations approval.
What garages do Formby homes usually have?
Because so much of Formby was built from the post-war years onwards, the garages are generally more regular than in older towns. That makes planning easier, though no two are quite the same.
- Integral single garagesBuilt into the house, often with a room above. Usually the quickest to turn into a warm room. See integral garage conversion.
- Attached garagesAlongside the house with their own roof, often a flat one. These need more upgrading to the walls and roof.
- Double garages on detached homesPlenty of space for two rooms, or a room with storage kept at the front. Our double garage conversion page covers the options.
Planning questions to settle with Sefton
For many houses, converting a garage is internal work that does not usually need planning permission. The exception to watch for in Formby is estate housing, where the original permission sometimes removed permitted development rights to keep parking off the road. The Planning Portal advises checking with the local authority, particularly on new developments. Sefton Council can tell you what applies to your address. If you want certainty in writing, a Lawful Development Certificate is one option.
Home office or annexe?
A home office
Working from home is one of the most common reasons we hear for converting a garage here. A garage home office needs good natural light, enough sockets, a sensible place for the router or a data cable, and a heat source that keeps the room comfortable during long days at a desk. Purge ventilation through an openable window and background trickle vents are part of the Building Regulations design.
An annexe for a relative
Larger Formby garages, especially doubles, can become a bedroom, shower room and small sitting area for an older parent who wants independence while staying close. A garage annexe needs careful thought about drainage, heating and fire safety. If it is fully self-contained, planning permission may be needed, and council tax banding can change. Ask Sefton Council about discounts that may apply where a dependent relative lives in an annexe.
We never promise that planning permission is not needed or that building control will approve a design. We explain the likely route, and the council or approver makes the decision.
Keeping the new room warm on an exposed site
Formby’s position near the coast means some homes catch strong wind and rain. That does not change the targets, but it puts the emphasis on detail: the new wall in the old door opening is built with a cavity or membrane and a proper damp-proof course, and the window is fitted and sealed with care. Wall, floor and roof insulation is designed to meet Part L, which building control checks on site.
Nearby towns
Formby sits between Crosby and Southport, and we cover both. Our homepage on garage conversion across Liverpool and Merseyside explains our approach in full, including how we work with a local garage conversion team of qualified trades.
Have a Formby garage in mind?
Call 07777 659786 and tell us about the garage and the room you need. We will call back and arrange to come and see it.
Frequently asked questions
Can I turn my Formby garage into an annexe for a parent?
Often yes, as long as it stays part of the household. A bedroom, shower room and sitting area linked to the main house is a common layout. If it becomes fully self-contained, planning permission may be needed, and the Valuation Office Agency may band it separately for council tax. Sefton Council can advise on possible discounts or exemptions.
Does a double garage need a different approach?
It gives more options, such as two rooms or a room plus storage, but the same rules apply. There may be a wider opening to infill, more roof to upgrade and a longer heating run. Our double garage conversion page explains how we plan the layout and the structural detail.
Should I get a Lawful Development Certificate before converting?
It is not required, but it can be useful. A certificate from Sefton Council confirms that your proposal is lawful without planning permission, which can help if you sell later. On newer estates where planning conditions may apply, it also settles the question before money is spent.
Will a home office in the garage be warm enough in winter?
It should be, once it is built to current standards. Insulated walls, floor and roof, good windows and a proper heat source are all part of the approved design. Formby is close to the coast, so we take extra care with the detailing around the new window and infill wall.