A double-storey extension adds two floors of new space to your house in one build, typically a larger kitchen or living room downstairs with an extra bedroom, bathroom or en-suite above, sharing one set of foundations and one roof.
We offer a double-storey extension across Gwent, and Newport, Gwent is one of the places we cover, along with nearby Risca, Cwmbran and Pontypool. Before anything is agreed we visit, check the existing structure and talk through your options. You then receive a written quote setting out the full scope; for most homes in Wales it sits within £55,000–£110,000 including VAT.
- Guide price
- £55,000–£110,000 inc VAT
- Time on site
- 14–22 weeks on site
- Postcodes
- NP10, NP19 and NP20
- Planning rules
- Wales
- Local area
- Newport
- Survey
- Free, with a written quote
Double-storey extensions prices in Newport, Gwent
Every figure below is a guide for a double-storey extension in Newport, Gwent, inclusive of VAT. Regional pricing for Wales works out about 8% below the national guide, and the overall span is £55,000–£110,000. The survey costs you nothing, and after it we commit to a firm price for your specification in writing.
| Type of job | What it usually involves | Guide in Newport |
|---|---|---|
| Small (15–20m² total) | A compact rear or side extension adding a small room on each floor. | £37,000–£60,000 |
| Typical (30–40m² total) | A larger kitchen or living room below with a double bedroom or en-suite above. | £55,000–£110,000 |
| Large (50m² plus total) | Wide or deep extensions, often with a new bathroom, steelwork and high-spec glazing. | £92,000–£166,000 |
The main things that change the figure:
- Combined floor area across both storeys
- How the new roof joins the existing roof
- Bathrooms, en-suites and plumbing on the upper floor
- Foundation depth, ground conditions and drains to divert
Scope of the work
- Groundworks, foundations and below-ground drainage
- Insulated cavity walls with brick or render to match the house
- First-floor joists, stud walls and new openings upstairs
- Roof structure tied into the existing roof, tiled to match
- Electrics, plumbing and heating by qualified trades, with certificates
- Building control inspections and completion certificate
Building in Newport, Gwent
Newport has Victorian and Edwardian terraces and interwar suburbs, while valley towns such as Ebbw Vale, Abertillery and Blaenavon have stone terraces stepped along steep hillsides. Monmouth and Abergavenny keep Georgian centres, and Cwmbran was built as a post-war new town with planned estates.
Valley terraces commonly need repointing, roof work and window replacement, and steep plots can make extensions more involved. Newport terraces suit loft rooms, while Cwmbran homes often take garage conversions and cladding upgrades.
These patterns matter for a double-storey extension: older walls, roofs and floors in Newport, Gwent can need different materials or extra preparation compared with newer homes.
Permissions for a double-storey extension in Newport, Gwent
Newport, Gwent is in Wales, so the planning and building rules set out below are the ones that apply. We confirm the details with the council before we quote.
In Wales, two-storey extensions are tightly limited under permitted development, including distance to the rear boundary, so most need planning permission.
Building Regulations approval is needed in Wales, and the Party Wall etc. Act 1996 applies to work on or near shared walls.
Rules change and every property is different, so we check the planning history and constraints for your address before we quote.
From survey to handover
We look at the job
It starts with a survey at the property, free of charge. We check condition, access and services, ask how you want the finished result to look, and answer any questions you have about a double-storey extension.
Quote in writing
Next you receive a written quote with a fixed price for the agreed specification. It lists what is included, what is not, and how payments are staged, so you can compare it properly.
Plan and prepare
With the quote agreed, we book the work in and handle preparation: permissions where needed, building control notifications, material orders and access arrangements for your Newport, Gwent property.
Build and hand over
Our trades complete a double-storey extension while your point of contact keeps you updated. When everything is finished, we clear the site, take away waste and go through the result with you before handover.
Working with SK Home Improvements
Questions about a double-storey extension in Newport, Gwent
Do I need planning permission for a two-storey extension?
Most two-storey extensions need planning permission, but it depends on the size, height and position, your home's location, whether it is listed or in a conservation area, and which UK nation you are in. In England, a two-storey rear extension can sometimes be built under permitted development if it is no deeper than 3m and at least 7m from the rear boundary. We check what applies before quoting.
Do I need planning permission in Newport, Gwent?
It depends on the work, the size of the project, your property type and whether the building is listed or in a conservation area. Newport, Gwent is in Wales, so Wales's rules apply. Many smaller jobs need no planning application, but some still need building control approval. We check what applies to your address before quoting.
How long does a double-storey extension take?
A double-storey extension typically takes 14–22 weeks on site, depending on size, roof design and weather. Foundations and ground-floor walls come first, then the first-floor joists, upper walls and roof. Once it is weathertight, electrics, plumbing, plastering and finishes follow. Allow extra time beforehand for drawings, calculations and approvals. We give you a stage-by-stage programme with your quote.
How is the new roof joined to the existing house?
The new roof is usually tied into the existing roof so the two read as one. On a rear extension this often means a lower ridge or a hipped end, with valleys where the slopes meet. We strip back some existing tiles, fix new rafters and battens, and lay matching tiles or slates. Lead or proprietary flashings seal the junctions so water runs off properly.
How much will a double-storey extension cost in Newport, Gwent?
As a guide, expect to pay £55,000–£110,000 including VAT for a double-storey extension in Newport, Gwent. That range is adjusted for Wales, which runs about 8% below the national guide. Where your project lands depends on size, materials, access and the condition of what is already there. We confirm a fixed price in writing after a free survey of your home.
Near Newport, Gwent
Homes across NP10, NP19 and NP20 in Newport, Gwent are within our coverage, as are those in Risca, Cwmbran and Pontypool. If you are just outside these areas, ask anyway, because we work right across the UK.