Property extensions in Sevenoaks, designed and built by one team
Sevenoaks, Riverhead and the villages out to Otford and Seal are dominated by high-value Edwardian and inter-war homes. Owners here expect detailed quotes, immaculate site protection and a builder who can coordinate architects without hand-holding. That is the job we take on.
"We had our loft insulated and boarded. From start to finish the process was smooth, professional and stress-free. Malcolm upgraded the insulation and …"
Where we come from
Tembok is based at Mockbeggar Lane in Biddenden, near Cranbrook, in the Weald. Sevenoaks sits at the far north-west of the area we cover, reached via the A21, so we take on Sevenoaks extensions as planned projects with a set programme rather than quick call-outs.
What Sevenoaks homes usually ask of an extension
The local housing stock shapes the extension long before anyone picks a kitchen.
| Home type | Typical brief | What we watch for |
|---|---|---|
| Edwardian villa | Rear kitchen and family room opening onto the garden | Matching brick, roof pitch and period joinery so the addition reads as part of the house |
| Inter-war detached | Wrap-around or side and rear extension | Steel beam design where original rear walls come out |
| Riverhead and Seal homes | Single-storey rear with roof glazing | Glazing and roofing detail, drainage runs and boundary lines |
Planning in the Sevenoaks district
Planning decisions here are made by Sevenoaks District Council. Much of the district outside the town is Metropolitan Green Belt, and parts of the town itself, including Sevenoaks Town and Otford, are conservation areas. Both can narrow what is possible under permitted development and make a full application the safer route.
Our house extension service includes architectural drawings, planning and building control. Building regulations approval is needed in every case, even when planning permission is not. If your plot is in a conservation area or the Green Belt, we say so at the first visit rather than after drawings are paid for.
How a Sevenoaks extension runs with us
- 1
Free site visit
We look at the house, the garden, access and the boundaries, and talk through what you want the space to do.
- 2
Fixed-price written quote
Itemised so you can see what each element costs, normally with you within about five working days.
- 3
Drawings and approvals
Architectural drawings, planning where needed and building control, coordinated by us, or alongside your own architect if you already have one.
- 4
Build
Groundworks, structure, steel beams, glazing and roofing by one accountable team, with the site protected and kept tidy.
- 5
Finish and handover
Joinery from our own Biddenden workshop where the design calls for it, then a 5-year workmanship guarantee on everything we build.
Questions about house extensions in Sevenoaks
Do you really cover Sevenoaks from Biddenden?
Yes. Sevenoaks is at the north-west edge of the area we cover, reached via the A21. We programme Sevenoaks extensions as planned jobs so the team is on site on set days.
Can you work with my architect?
Yes. We can produce drawings and handle planning ourselves, or build to plans your architect has already drawn and coordinate with them through the build.
Will I need planning permission in Sevenoaks?
It depends on the house and where it sits. Green Belt and conservation area locations often need a full application. Building regulations approval is always required.
What guarantee do you give?
Every project carries a 5-year workmanship guarantee, and we are fully insured with £5m public liability cover. Manufacturer warranties pass through unchanged.
How much experience does the team have?
More than 40 years in building and carpentry across Kent and East Sussex.
Ready to price your house extensions in Sevenoaks?
Free site visit, fixed-price written quote and a 5 year workmanship guarantee — backed by 40+ years on the tools and our workshop in Biddenden.
"We had our loft insulated and boarded. From start to finish the process was smooth, professional and stress-free. Malcolm upgraded the insulation and …"