Portsmouth porch extensions, designed and built
Planning a porch extension in Portsmouth? We survey the house, work out the planning route, draw the design and build it, so you deal with one team from the first visit to the completion certificate.
- Guide price in PortsmouthFrom £4,450 inc VAT
- PlanningUsually permitted development under 3 m²
- Build time2–4 weeks on site
- Postcode districtsPO1, PO2, PO3, PO4, PO5
Guide prices for Portsmouth
For Portsmouth we adjust our national guide rates by ×1.12, the factor we use for South East England. Figures include VAT; your written quote after the survey replaces them.
| Option | What it covers | Guide price |
|---|---|---|
| Essential | Small brick or glazed porch, up to 3 m² | £4,450 – £7,300 |
| Standard | Brick porch with tiled roof and composite door | £6,700 – £10,650 |
| Premium | Larger porch with WC or oak frame and premium glazing | £10,050 – £16,800 |
For a figure based on your own dimensions, use our guide-price tool.
What is included
- Foundations and drainage for rainwater
- Tiled, slate or flat roof
- Front door, glazing and electrics
- Planning check against the porch limits
- Brick, render or oak frame walls
Covering Portsmouth
Our survey diary covers Portsmouth, including PO1, PO2, PO3, PO4, PO5, PO12. We also work in nearby Gosport (2 miles), Fareham (5 miles), Havant (6 miles), Waterlooville (6 miles).
Ryde, in Isle of Wight, is roughly 6 miles from Portsmouth and also on our list. In the South East, plenty of houses have already been extended once, which makes checking the remaining permitted development allowance an important early step.
Planning rules that apply in Portsmouth
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.
Homes in conservation areas, national parks, National Landscapes (formerly AONBs), the Broads and World Heritage Sites have tighter rules, so we always check the property's status and planning history before design starts.
Building over or within 3 m of a public sewer needs the water company's consent, usually through a build-over agreement, before the foundations go in.
If the work involves a shared wall, building on the boundary, or digging foundations within 3 m (sometimes 6 m) of a neighbour's building, the Party Wall etc. Act 1996 applies and notice must be served before work starts: two months for work to a party wall, one month for new walls on the boundary and for excavations.
Applications are decided by the local planning authority (your district, borough or unitary council).
From first visit to completion
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
It starts with a visit to your house to measure, check access and talk through ideas and budget.
Design and approvals
Drawings are prepared and agreed with you, then submitted for the right planning route and building regulations approval.
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
Our team builds the extension, keeps you updated weekly and finishes with building control sign-off.
Common questions in Portsmouth
How long does a porch extension take to build in Portsmouth?
On site, typically 2 to 4 weeks once approvals are in place. Before that, allow 2–8 weeks design and approvals.
Can I see a price before committing to anything?
Yes. The guide prices on this page are adjusted for Portsmouth, and the guide-price tool gives a range for your own size. After the survey you get a written price before anything is agreed.
Do you cover all of Portsmouth?
Yes. We cover Portsmouth and the surrounding parts of Hampshire. Site visits are free and there is no obligation.
How much does a porch cost?
Our guide range is about £4,450 to £16,800 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 Portsmouth
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.