The short answer
An enclosed porch is a fully closed-in structure built around an external door, with walls, glazing, a roof and its own outer door — as opposed to an open porch or canopy that only shelters the doorway. Enclosing the entrance creates a draught lobby that keeps heat in, adds security and gives space for coats and shoes. An enclosed porch is still usually exempt from planning permission and building regulations when its floor area is 3m² or less, it is more than 2m from a highway boundary and no more than 3m high, and the original front door stays in place.
The word “porch” covers everything from a simple canopy over the door to a fully glazed room at the entrance. An enclosed porch is the most useful end of that range, because it adds a genuine buffer between outside and in. This guide explains what makes a porch enclosed, the practical benefits, and how the planning and building-regs position works for an enclosed structure. All figures are typical illustrations rather than quotes, and the build should be carried out by an FMB-registered or building-control-approved porch builder.
Enclosed porch at a glance
- Structure Walls, glazing, roof, outer door
- Main benefit Draught lobby keeps heat in
- Materials uPVC, brick or a mix
- Typical cost £3,000–£8,000
- Front door Original stays in place for exemption
- Planning & regs (if ≤3m²) Usually exempt
Enclosed versus open
An enclosed porch closes in the space in front of the door with walls and glazing and adds its own outer door, so you pass through two doors to enter the home. An open porch or canopy simply provides a roof and perhaps side panels over the doorway, with no outer door. The enclosed version costs more but does much more: it creates a sealed draught lobby, adds a layer of security, and gives somewhere to leave wet coats and muddy boots. For the simpler alternative, see porch vs canopy.
| Feature | Enclosed porch | Open porch / canopy |
|---|---|---|
| Outer door | Yes | No |
| Draught lobby | Yes | No |
| Storage space | Yes | Limited |
| Typical cost | £3,000–£8,000 | £1,000–£2,500 |
The benefits of enclosing the entrance
- Warmth — the draught lobby reduces heat loss every time the front door opens, which can help at the entrance of the home.
- Security — a second lockable door adds a barrier and somewhere to receive parcels out of sight.
- Storage — space for coats, shoes, umbrellas and muddy boots before they reach the hall.
- Kerb appeal — a well-designed enclosed porch can lift the look of the entrance, especially in brick. See does a porch add value.
Planning and building regulations
An enclosed porch is treated the same way as any porch for planning and building-regs purposes. Keep it within 3m², more than 2m from a highway boundary and under 3m high, with the original front door retained, and it is normally exempt from both. The glazing should be safety glass in critical locations and is best fitted by a FENSA or CERTASS registered installer. See building regulations for a porch and do I need planning permission for a porch. This is general guidance, not advice for your specific property; always confirm with your local planning authority and building control.
Planning an enclosed porch? Compare quotes
An FMB-registered or building-control-approved porch builder can design an enclosed porch to suit your entrance and give you an itemised quote. Free to use, no obligation.
Frequently asked questions
What is an enclosed porch?
An enclosed porch is a fully closed-in structure built around an external door, with walls, glazing, a roof and its own outer door. You pass through two doors to enter the home, creating a draught lobby that keeps heat in and adds security and storage.
Is an enclosed porch warmer than an open one?
Yes. An enclosed porch creates a draught lobby between outside and in, which reduces heat loss each time the front door opens. An open porch or canopy only provides shelter over the doorway and does not create that buffer.
How much does an enclosed porch cost?
An enclosed porch typically costs £3,000–£8,000 depending on whether it is uPVC, brick or a mix, plus its size and groundwork. uPVC is the cheapest and brick the most. See the main porch cost guide.
Does an enclosed porch need planning permission?
Usually not, provided its floor area is 3m² or less, it is more than 2m from a boundary fronting a highway, it is no more than 3m high, and the original front door stays in place. Exceed any limit and approval is usually needed.
Sources & further reading
- Planning Portal — porches: permitted development rules
- GOV.UK / Building Regulations Approved Documents — when a porch is exempt
- Federation of Master Builders (FMB) — finding a registered builder
- FENSA / CERTASS — registered installers for glazed porch elements
This is general information, not advice for your specific property or project. Costs and outcomes vary with your home, the porch you choose and your chosen builder. We are an independent information and introduction service, not a builder.