Extensions Specialists Covering Hemel Hempstead
Extensions across Hemel Hempstead and Boxmoor, Adeyfield, Bennetts End — 26+ years building in Hertfordshire.
Extensions Specialists Covering Hemel Hempstead
Hemel Hempstead extensions jobs tend to share a few common themes — and over 26 years working in Hertfordshire we've learned where the time and money actually goes.
Hemel Hempstead splits into the post-war New Town and the much older Old Town up the hill — two very different building stocks and very different jobs for a builder.
Hemel Hempstead extensions for us range across the patch — single-storey rear on New Town estate housing, full matched-brick extensions on Old Town and Boxmoor period property, and substantial wrap-arounds on the larger detached plots.
“Our rear extension is honestly the best part of the house. Done on time, no surprises.”
What we look at first on Hemel Hempstead extensions jobs
New Town areas like Adeyfield, Bennetts End and Grovehill are predominantly 1950s–1970s concrete-frame and cavity brick; the Old Town and Boxmoor have substantial Georgian and Victorian period stock. Hemel sits on chalk with clay-with-flints, but the New Town's heavy 20th-century earthworks mean made-ground is common — we always test before pricing structural work.
- Dacorum planning and Conservation Area sign-off for Old Town and Boxmoor extensions
- Trial pits to confirm what's actually beneath New Town slabs and footings before relying on the existing foundation
- Matched brick and tile so a new Hemel extension reads as part of the original house
Dacorum Borough Council protect the Old Town High Street Conservation Area and Boxmoor's character carefully, while New Town estates often carry estate-management covenants on front-of-property changes.
Our extensions process for Hemel Hempstead
- 01Site survey
We meet you on site, look at the actual property and talk through what's realistic before drawings or planning go anywhere.
- 02Planning and Building Regs
We work alongside your architect on planning, Building Regs and party-wall awards — or recommend a trusted one.
- 03Foundations and shell
Trial pits, proper foundation depth, accurate setting out and a watertight shell before first fix begins.
- 04First and second fix
Electrics, plumbing, plaster and joinery brought through to a high finish — including matched external brick, tile and rainwater detailing.
- 05Sign-off and handover
Building Control sign-off, our own written guarantee, snagging cleared and a tidy site at handover.
What's included on Hemel Hempstead extensions jobs
- Single-storey rear and side extensions
- Double-storey and wrap-around extensions
- Kitchen, dining and family-room extensions
- Foundations, structural steel and load-bearing alterations
- Matched external brick, tile and rainwater detailing
- Full first and second fix, plaster and joinery
Typical Hemel Hempstead use cases
- Double-storey side returns on Victorian terraces
- Wrap-around extensions opening up the rear of the house
- Two-storey rear extensions for growing families
- Front porches and entrance extensions
Materials and methods we use
Common extensions questions in Hemel Hempstead
- Can you work on Old Town Hemel Hempstead Conservation Area properties?
- Yes — we use matching brick, lime mortar and traditional joint profiles on Old Town and Boxmoor work, and we'll bring samples on site before agreeing the spec.
- Are there issues building on New Town foundations in Hemel?
- Sometimes. Original 1950s–1970s slabs and footings vary in quality and depth, so we trial-pit and design extensions to bridge or replace rather than rely on the existing foundation.
- Do you cover Apsley and Leverstock Green?
- Yes — both sit in our normal Hemel coverage along with Boxmoor, Adeyfield, Bennetts End and Grovehill.
- Single-storey extension cost guide for Hemel Hempstead?
- Costs vary by spec, but on a standard Hemel Hempstead single-storey rear extension you're typically looking at a clear price band once we've seen the property — we'll give you a written, itemised quote rather than a guess.
- Do you handle planning applications in Hemel Hempstead?
- We work alongside your architect on the planning application and Building Regs in Hemel Hempstead — or recommend a trusted one if you don't have one yet.
Where in Hemel Hempstead we work
Typical work splits between rear extensions and modernised garden rooms on Adeyfield-era houses, and matched-brick period extensions and re-pointing in the Old Town and Boxmoor.
- Boxmoor
- Adeyfield
- Bennetts End
- Grovehill
- Apsley
- Leverstock Green
Working postcodes: HP1, HP2, HP3 · roughly 12 miles from our Bidwell yard.
Other services we offer in Hemel Hempstead
Other towns we deliver extensions in
Quick recap — Hemel Hempstead extensions
Planning a Hemel extension? Send us the plans or photos and we'll come and price it.
If you're weighing up extensions options anywhere in Hemel Hempstead (HP1, HP2, HP3), we'll come and walk through what's actually possible.
For more about how we work, see our main extensions page or browse all areas we cover.
Related extensions projects near Hemel Hempstead
Recent extensions builds we've completed across Bedfordshire — the same team and standards you'll get in Hemel Hempstead.
- Front Porch with Vaulted Lean-To RoofA new front porch and vaulted lean-to roof adding kerb appeal and 4 sq m of practical hallway space.
- Open-Plan Summer Room ExtensionAn additional open-plan summer room built for entertaining, designed to feel bright and connected to the garden all year round.
- Garage Extension — Music RoomExtension of the garage to create a separate room away from the house, purpose-built for music practice.