top of page
Modern single-storey brick house extension with roof windows and large glass doors

House extensions and alterations in Durham with turnkey project management

One-stop shop from plans to finish. One-storey and multi-storey builds. Gas Safe registered for heating works.

Exceptional qualities

Strong building knowledge

Generations of building experience help guide careful structural alterations.

Practical spaces for real daily use

We finish spaces to suit how you live every day, creating practical, comfortable homes that work well.

Complete project management

Every stage coordinated carefully from planning approval through to the finished extension.

Extra space without the usual runaround

House extensions and alterations should make your home work harder, not leave you juggling trades and paperwork. We handle the full job, from early project plans through planning and building control to the final fit-out. That means footings, drains, floors, the main build, roofing, insulation, windows, doors, joinery, plastering, décor, and outside finishes are all kept moving under one roof. 

 

If your kitchen feels boxed in or your family has simply outgrown the layout, we can create the extra room you need in a way that feels properly joined to the rest of your home. Our team at Ranson Roofing & Building Ltd brings together building knowledge shaped over generations, which matters when alterations need sound structure and careful sequencing. We know you want fewer headaches, clearer communication, and a finished space you can settle into straight away.

Modern living room interior feature wall with built-in shelves and integrated electric fireplace
Rear garden view of a brick house extension under construction with bi-fold doors

What could be included in your project

  • One-storey or multi-storey extensions.

  • Project planning and plan development.

  • Planning and building control support.

  • Structural engineer coordination.

  • Kitchen and bathroom supply and installation.

Frequently asked questions

Haz Boy, Google

Cannot speak more highly; excellent job done by the team from Ranson Roofing & Building Ltd. Really good; would not let anyone else work on my roof. Thank you and your team.

From structural work to the final details

Our process covers the parts that often slow projects down, including structural engineer input, building control stages, and the practical groundwork that has to be right before anything visible takes shape. We also supply and install kitchens and bathrooms, with electrical work, plumbing, plastering, and structural alterations included where needed. If your plans involve new stairs, stud walls, door frames, skirting, or second-fix joinery, we can carry that through as part of the wider project instead of leaving gaps between trades. 

 

Mobility bathrooms are another area we can help with, including level shower trays, Doc M toilet packs, hand rails, shower seats, anti-scald showers, and non-slip flooring. Ranson Roofing & Building Ltd can also fit these solutions for residential customers and care homes when safer access matters every day.

Planning an extension or alteration?

Call now to start your house extensions and alterations project.

Contact us

Ranson Roofing & Building Ltd

Unit 7, Avenue Three, Chilton Ind Est,

Ferryhill, DL17 0PB

  • Google Business Profile

Business hours

Monday–Friday: 07:30 - 18:00

Saturday: 07:30 - 12:00

Sunday: Closed

RANSON ROOFING AND BUILDING LTD, registered as a limited company in England and Wales under company number: 11387505.


Registered Company Address: 25 Branksome Terrace, Darlington, Durham, England, DL3 6AZ.

Review us on Yell Logo

Terms of Use | Privacy & Cookie Policy | Trading Terms

© 2026. The content on this website is owned by us and our licensors. Do not copy any content (including images) without our consent.

bottom of page