Porch extensions in Hertfordshire
A porch extension in Hertfordshire starts with the right design and the right approval route. We take care of both, then build it with our own project management.
- Guide priceFrom £4,200 inc VAT
- PlanningUsually permitted development under 3 m²
- Towns covered18
- Site visitFree, no obligation
Towns in Hertfordshire
What should I budget for a porch extension in Hertfordshire?
Labour and material costs vary across the UK, so for Hertfordshire we use our East of England factor (×1.06). The ranges include VAT and exclude design, structural and council fees.
| Option | What it covers | Guide price |
|---|---|---|
| Essential | Small brick or glazed porch, up to 3 m² | £4,200 – £6,900 |
| Standard | Brick porch with tiled roof and composite door | £6,350 – £10,100 |
| Premium | Larger porch with WC or oak frame and premium glazing | £9,500 – £15,900 |
Want a range for your exact size? The guide-price tool takes about a minute.
Working in Hertfordshire
Towns we cover in Hertfordshire include Watford, Hemel Hempstead, Stevenage, St Albans, Welwyn Garden City, Cheshunt, Hatfield, Bishop's Stortford. Across the East of England many houses sit on generous plots, and single-storey and wraparound extensions are a natural fit.
Will the council need to approve it?
In England a porch is usually permitted development if its ground floor area is no more than 3 m² measured externally, no part is over 3 m high, and no part is within 2 m of a boundary next to a road.
The planning position for a specific Hertfordshire address depends on its history and any designations, which is why we check it at the first visit.
Building regulations approval is separate from planning. In England you can use the council's building control team or a registered building control approver; a full plans application gets the drawings checked before work starts, and the inspector signs the work off with a completion certificate.
Applications are decided by the local planning authority (your district, borough or unitary council).
Who a porch extension suits
- Busy hallways with no storage
- Front doors that open straight into a living room
- Homes wanting better kerb appeal
How the project works
Site visits are free and there is no obligation. Where drawings are needed, the design stage is priced in writing before it starts.
Free site visit
A designer visits, takes measurements and photos, and discusses layouts, budget and timing with you.
Design and approvals
We draw the design, agree it with you and handle planning or permitted development checks and building regulations.
Fixed written price
We confirm the build price in writing, based on the approved drawings and the finishes you have chosen.
Build and sign-off
Work is carried out to the agreed programme, inspected by building control and signed off at the end.
Your questions about a porch extension in Hertfordshire
Will my neighbours in Hertfordshire be involved?
If a planning application or prior approval is needed, the council notifies neighbours. If the work is on or near a shared boundary, party wall notices may also be needed.
How long does a porch extension take to build in Hertfordshire?
On site, typically 2 to 4 weeks once approvals are in place. Before that, allow 2–8 weeks design and approvals.
Do you cover all of Hertfordshire?
Yes, across the whole of Hertfordshire. Site visits are free and there is no obligation.
How much does a porch cost?
Our guide range is about £4,200 to £15,900 including VAT, depending on size, materials and whether it includes a WC.
Do I need planning permission for a porch?
In England a porch is usually permitted development if its ground floor area is no more than 3 m² (measured externally), no part is higher than 3 m, and no part is within 2 m of a boundary next to a highway. Other nations have similar but separate rules.
Book a free site visit in Hertfordshire
We will measure up, check the planning position and give you honest guide figures.
- Free, no-obligation site visit
- Planning route checked before you spend on drawings
- Written price once the design is agreed
- Building control sign-off at the end
Prefer to talk? Call 0800 088 6341 or .
Book a free site visit
Tell us a little about the project and we will arrange a time.