We convert both kinds of garage you find in Allerton, L18 and parts of L19: attached garages beside inter-war semis, and detached garages behind larger houses. An attached garage usually becomes an extra room inside the home. A detached garage can become a studio, gym or family annexe, but self-contained use may need planning permission, so we look at what you want it to do before anything is drawn.
Attached or detached: how the job differs
| Attached garage | Detached garage | |
|---|---|---|
| Connection to the house | Usually a new or existing internal doorway | Separate building, reached across the garden |
| Insulation | Outside walls, floor and roof; shared house wall less exposed | All four walls, the floor and the roof |
| Services | Extended from nearby circuits and pipes | New power, sometimes water and drainage, run across the garden |
| Planning | Not usually needed for internal work, but check for conditions | Self-contained use is a material change of use and may need permission |
Thinking about an annexe?
Larger Allerton plots sometimes have a detached or double garage with enough room for a bedroom, a small kitchen area and a shower room. That can work well for an older parent or a grown-up child, but the details matter. Keeping the space ancillary to the main house, sharing the address and utilities, is different from creating a separate home. Our garage annexe page explains where that line usually falls, and council tax is worth checking too, because a self-contained annexe can be banded separately.
Water and drainage across the garden
A shower room or kitchenette in a detached garage needs a water supply and a route for waste to reach the drains. New drainage falls under Part H of the Building Regulations. Where gravity drainage is not possible, a pump-assisted macerator is sometimes used, subject to building control. Heating may be extended from the house or provided electrically. Our plumbing and heating page covers what qualified trades do and the paperwork you receive.
Inter-war semis with attached garages
Many of the inter-war semis in Allerton have a garage added to the side. These are usually converted into a study, snug or downstairs bedroom. The work typically involves infilling the door opening, insulating the floor and outside walls, upgrading the roof and linking the room to the hall. A double garage on a larger detached home gives more choice; our double garage conversion page shows how the space can be split.
Losing a garage can matter if the original planning permission asked for off-street parking. Most Allerton driveways stay as they are, but it is worth checking the planning history of your house with the council.
What we look at on an Allerton visit
We check the foundations and walls of the garage, the roof covering, the floor level against the house, and the route any new services would take. For a detached garage we also look at the distance to the house and the drainage. You then receive a written quote. Our page on garage conversions throughout Liverpool explains the rest of the process.
Neighbouring areas
Allerton borders Childwall and sits close to Woolton, and we work in both. For a summary of the rooms we create, see the garage conversion specialist for Liverpool homepage.
Detached or attached garage in Allerton?
Call 07777 659786 and tell us which you have and how you want to use it. We will call back to talk it through.
Frequently asked questions
Does converting a detached garage in Allerton need planning permission?
It can. The Planning Portal says turning a detached garage into self-contained living space needs planning permission because it is a material change of use, particularly if it will work independently from the house. A room that stays ancillary to the house is treated differently. Liverpool City Council can advise on your property.
Will a garage annexe be charged council tax separately?
It might be. The Valuation Office Agency can band a self-contained annexe separately, and councils offer discounts or exemptions in some cases, such as where a dependent relative lives there. Check with Liverpool City Council before you finalise the layout, because it can affect how the annexe is planned.
Can heating be run from the house to a detached garage?
Sometimes. If the boiler has enough capacity and the pipe run is practical, the existing system can be extended. Otherwise electric heating or electric underfloor heating is often used. Any gas work must be done by a Gas Safe registered engineer, and pipe runs across a garden need planning on the drawings.
What postcode areas does Allerton cover?
Allerton is mostly L18, with parts in L19. Both are in Liverpool, so planning and building control are handled by Liverpool City Council or a Registered Building Control Approver.
Does a garage conversion add value to an Allerton house?
We cannot promise any figure. Whether a conversion adds value depends on the house, the street, the quality of the work and what local buyers want, including parking. A local estate agent or surveyor is the right person to ask before you commit.