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Arshad Ali
We are a Design and Build company based in Hampshire. Proud of our roots, we try to be the very best in the way we go about our business. Friendly...
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
Luke Rees
General Building Services (Southampton) Ltd is a trusted extension builder serving customers in Romsey and the surrounding area. Contact us to toda...
Experienced extension builder ready to quote for your work. CSY Construction Ltd is the best extension builder in Romsey. No obligation free quotes...
Experienced extension builder ready to quote for your work. Grant Construction is the best extension builder in Romsey. No obligation free quotes a...
Need an Extension Builder in Romsey? T & S Construction has been helping local clients (20 mile radius) with their extension buildering jobs for ma...
Trowel On is an established extension buildering business in Romsey. We come highly recommended and provide competitive quotes for your work.
The business offers a full design service for both kitchens and bathrooms.We work with you to make the best use of your space and find prod...
Alex Molyneux
Romsey, SO51
We specialise in Epoxy Resin and Polyurethane floor coatings and screeds (very durable and seamless flooring), designed for retail, factories, manu...
Shy Browm
Experienced extension builder ready to quote for your work. Shay building LTD is the best extension builder in Romsey. No obligation free quotes an...

A flat roof extension ranges from the cheapest of £20,848 (Floortrak Limited based in SO51) to the dearest of £22,192 (AAConcepts based in SO14), but these are just estimates. While they give you an idea of who will be better value, the best way to compare costs is to get real quotes.
Find out how much your flat roof extension will cost in Romsey by posting a job with HaMuch. We'll send it to extension builders in Romsey.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Build A Flat Roof Extension near Romsey | £32 | £230 |
| Build A Flat Roof Extension near Chandler's Ford | £34 | £245 |
| Build A Flat Roof Extension near Totton | £34 | £243 |
| Build A Flat Roof Extension near Eastleigh | £34 | £244 |
| Build A Flat Roof Extension near Southampton | £34 | £243 |
| Build A Flat Roof Extension near Test Valley | £37 | £261 |
| Build A Flat Roof Extension near New Forest | £32 | £245 |
| Build A Flat Roof Extension near Winchester | £39 | £283 |
| Build A Flat Roof Extension near Hedge End | £34 | £244 |
| Build A Flat Roof Extension near Locks Heath | £33 | £240 |
Whether you’re looking to extend your kitchen with a side return extension or you want to convert your basement into a liveable space, read our cost guides to get an idea of how much each project costs before getting a more accurate quote from our database of reliable tradespeople.

Underpin a building - £17,398

Two storey extension - £87,848

Build a timber frame extension - £25,898

Build a swimming pool - £80,898

Single storey extension - £52,968

Side return extension - £40,357

Install an RSJ - £2,098

Outbuilding - £9,898

Build a Mansard loft conversion - £51,898

Loft conversion - £32,798

Build a kitchen extension - £41,898

Hip to gable loft conversion - £41,898

Granny annexe - £86,898

Garden office - £9,898

Convert a Garage - £15,898

Garage - £18,398

Build a flat roof extension - £21,898

Build a dormer loft conversion - £41,898

Concrete foundations - £6,148

Convert a bungalow loft - £28,898

Convert a basement - £36,357