01
House extensions
Rear, side-return and wrap-around extensions that bring in light and space.
- Single and double-storey
- Side-return and wrap-around
- Bi-fold doors and rooflights
- Steel beams and structural work
Everything your home needs
From a new bathroom to a whole-house renovation: one team, one point of contact.
02
Loft conversions
Dormer, hip-to-gable and mansard lofts, from structure to final finish.
- Dormer and hip-to-gable
- Mansard conversions
- New staircase and insulation
- En-suite bathrooms
03
Full refurbishments
Whole-house renovations: rewiring, replastering, heating and new layouts.
- Rewiring and new heating
- Replastering and flooring
- Knock-throughs and new layouts
- Decorating and finishing
04
Kitchens
Kitchen fitting and open-plan knock-throughs, steel beams included.
- Supply-and-fit or fit-only
- Open-plan knock-throughs
- Electrics and plumbing
- Worktops and tiling
05
Bathrooms
Bathrooms, en-suites and wet rooms, fully tiled and finished.
- Bathrooms and en-suites
- Wet rooms and walk-in showers
- Underfloor heating
- Full tiling and finishing
06
New builds
New homes and outbuildings, managed from groundwork to handover.
- Groundwork and foundations
- Structure and roofing
- First and second fix
- Full fit-out to handover
The Sehmi Standard
Ten commitments we make on every project, whatever the size. Hold us to them.
Harpreet SinghHarpreet Singh, founder & director
- 01
Free survey, written quote
Every job starts with a site visit and an itemised quote in writing.
- 02
One named project lead
The same person runs your job from start to finish, and answers your calls.
- 03
Timeline agreed up front
Start date and key stages set out before any work begins.
- 04
Your home protected
Floors, stairs and furniture covered before we lift a tool.
- 05
Cleared every day
Rubbish removed and the site left safe and tidy each evening.
- 06
Weekly photo updates
Progress photos and a quick summary, so you’re never guessing.
- 07
Neighbours kept informed
We let them know before noisy or disruptive work.
- 08
No surprise extras
Any change is priced and agreed with you before we do it.
- 09
Snagging walk-round
We check every detail together before we call the job done.
- 10
[X]-year guarantee
[Your workmanship guarantee, in one line.]
How it works
Four simple steps
- 1
Free site survey
We visit, measure up and listen to what you want from the space.
- 2
Design & quote
Drawings, approvals help and an itemised written quote.
- 3
The build
One project lead, a tidy site and regular progress updates.
- 4
Handover
A final walk-round together, sign-off and aftercare.
FAQs
Questions, answered
Can’t see your question? Give us a call and we’ll talk it through.
Ask us a questionAre your site surveys and quotes free?
Yes! At Sehmi Construction, we offer free, no-obligation site surveys and quotations. Our team will discuss your requirements, assess the property, take the necessary measurements and provide a clear, itemised quotation. This helps you understand the scope and estimated cost of your project before making any commitment.
Which areas of London do you cover?
Sehmi Construction undertakes residential building and renovation projects across London and surrounding areas, subject to project location and availability. Whether you're planning a house extension, loft conversion, kitchen renovation or complete property refurbishment, get in touch with your postcode and project details to check if we cover your area.
Can you help with planning permission and building regulations?
We can help you understand the planning and building regulation requirements relevant to your project. Some extensions and loft conversions may fall under permitted development rights, while others require planning permission. Where specialist input is needed, we can discuss working alongside architects, structural engineers and building control professionals to help your project progress smoothly.
Will I have one point of contact?
We believe good communication is essential to a successful building project. Our aim is to provide you with a dedicated point of contact who can answer your questions, discuss progress and keep you informed throughout the construction process. Harpreet Singh, founder of Sehmi Construction, is committed to a professional and customer-focused approach.
Do you offer a guarantee on your work?
At Sehmi Construction, we take pride in delivering quality workmanship and carefully finished projects. We aim to complete every job to an excellent standard, using suitable materials and experienced tradespeople. Any applicable workmanship guarantees or manufacturer warranties will be explained and confirmed before work begins.
How soon can you start?
Our availability depends on the size and complexity of your project, our current schedule and whether planning approvals or other preparations are required. Smaller renovations may be arranged sooner, while larger extensions and new builds generally require additional planning. Contact Sehmi Construction to discuss your requirements, and we'll provide an estimated start date and project timeline.
Ready to start your project?
Book a free site survey. We’ll visit, talk through your plans and send a clear written quote, with no pressure to go ahead.