Full-plans building regulations drawings for Mole Valley — the technical construction set covering structure, fire safety, insulation and Part L, drawn to satisfy building control so your builder can price and build with certainty, delivered in days and revised free until sign-off, with a free project check first.
Mole Valley District Council granted 83% of the householder planning decisions it made in its latest published year — 4 points below the 87% England-wide householder average. Metropolitan Green Belt covers the bulk of the district and the adopted plan releases well under one per cent of it, so countryside development is tightly controlled, which is where a policy-literate drawing pack earns its keep. Its dominant Victorian (1837–1901), Edwardian (1901–1910), interwar (1918–1939) and postwar (1945–1970) housing stock sets the design brief on most streets.
The permitted-development ceilings are fixed: 40m³ of new roof volume for a terraced loft and 50m³ for a semi or detached house under Class B, plus a 3m single-storey rear extension on a terrace or 4m on a detached house under Class A. Mole Valley carries at least one Article 4 direction, and conservation areas including Dorking, Leatherhead and Brockham remove those rights outright, so we confirm your exact address before a line is drawn. A validated householder application in Mole Valley is determined against an 8-week statutory target.
Dorking (a historic market town with a Victorian and Edwardian core, a conservation area and an Article 4 direction), Leatherhead (a market town of mixed period and postwar housing with a conservation area and an Article 4 direction), Great Bookham (an affluent commuter village with its own conservation-area character), Fetcham (largely interwar and postwar suburban semis and detached houses near Leatherhead), Brockham (a green-belt village around a classic green with a conservation area and an Article 4 direction) and Westhumble (a small Surrey Hills village of detached rural stock below Box Hill) — these are the Mole Valley pockets our drawings cover most. Heritage designations here include Dorking, Leatherhead, Brockham, Great Bookham and Little Bookham. Mole Valley District Council weighs each proposal against the Mole Valley Local Plan 2020–2039 (adopted October 2024), where the Surrey Hills National Landscape (AONB) covers much of the south and west around Dorking and Box Hill, where landscape scrutiny is heightened. Converted flats appear around Dorking and Leatherhead town centres, and none of them hold householder permitted-development rights.. On roofs the borough is dual-pitch tiled roofs on the town villas and terraces and hipped roofs on the interwar suburban semis, over Victorian and Edwardian terraces and villas in the market towns of Dorking and Leatherhead, interwar and postwar suburban semis and detached houses around the towns, substantial detached housing and period cottages in the green-belt and Surrey Hills villages and larger rural country properties to the south and west.
Planning permission decides whether you can build; the Building Regulations decide that what you build is safe, warm and sound. They are two separate approvals, run by different bodies, and a Mole Valley project usually needs both. The building regulations set is the technical layer beneath the planning drawings — construction sections, structural details, insulation build-ups and fire-safety provisions that a builder works from and a building control surveyor checks against the approved documents.
In practice that means Part A structure — beam and foundation details with the structural calculations behind them; Part B fire — escape, protected routes and, in a loft, a fire door and mains-linked alarms; Part L conservation of fuel and power — U-values, insulation and airtightness; plus drainage, ventilation and stairs. On Mole Valley's stock, which runs to Victorian and Edwardian terraces and villas in the market towns of Dorking and Leatherhead, interwar and postwar suburban semis and detached houses around the towns, substantial detached housing and period cottages in the green-belt and Surrey Hills villages and larger rural country properties to the south and west, the recurring challenge is meeting Part L in solid-walled period houses without ruining the room, and we detail the insulation to hit the numbers with the least intrusion.
Building control applies everywhere in Mole Valley regardless of planning designation, but in conservation areas such as Dorking, Leatherhead, Brockham, Great Bookham and Little Bookham the two processes interact — insulation and window details often have to satisfy Part L and a planning condition at once. Mole Valley has Article 4 directions removing permitted-development rights in the Dorking, Leatherhead and Brockham conservation areas, so that features contributing to their character cannot be altered without consent. We draw the construction details to reconcile both.
A full-plans set for Mole Valley building control is checked against the Approved Documents. A typical extension or loft set covers each of these:
We produce the full-plans construction set — structure, fire, thermal and drainage details with the structural calculations — and submit it to your chosen building control body, whether that is Mole Valley District Council's own team or an approved inspector, so problems are settled on paper before they cost money on site.
Building control is a separate approval, but most Mole Valley projects clear planning first, so Mole Valley District Council's live decision record below sets the context. Mole Valley grants a lower share of applications than the national average, with near-total Green Belt coverage and the Surrey Hills AONB the constraints behind most refusals of larger schemes. We handle both stages, so the construction drawings follow through seamlessly once permission is granted.
Source: MHCLG planning application statistics (householder decisions, England, 1 April 2025 - 31 March 2026). Compare every borough on our London approval-rate league table.
Tell us about your project and get a fixed, no-obligation quote back within one working day. If you don't need planning permission at all, we'll tell you that too — for free.
There are two ways to get building control approval, and for anything structural in Mole Valley we recommend the full-plans route — particularly on the borough's victorian and edwardian terraces and villas in the market towns of dorking and leatherhead and interwar and postwar suburban semis and detached houses around the towns, where opening up an old structure tends to reveal surprises. A building notice lets work start with no approved drawings — cheaper up front, but the surveyor rules on compliance as the build proceeds, so a wrong detail is discovered mid-work and rebuilt at your cost. Full plans get the whole set checked and approved before a brick moves, which is what banks, warranty providers and future buyers want to see.
Full plans also protect the project commercially. With approved construction drawings your builder prices exact quantities rather than guessing, and there is a completion certificate at the end — the document a solicitor asks for when you sell across Dorking, Leatherhead and Great Bookham and the rest of Mole Valley. Where a project sits in a controlled setting — Metropolitan Green Belt covers the bulk of the district and the adopted plan releases well under one per cent of it, so countryside development is tightly controlled — the construction details also have to respect what planning has conditioned, and we draw the full set and manage the building control submission to reconcile both.
Every structural project needs building regulations drawings whatever the planning position. A few of the Mole Valley neighbourhoods and property types where we prepare them most often:
Building regulations drawings for Dorking's a historic market town with a Victorian and Edwardian core, a conservation area and an Article 4 direction — structure, fire and Part L detailed for building control sign-off.
Building regulations drawings for Leatherhead's a market town of mixed period and postwar housing with a conservation area and an Article 4 direction — structure, fire and Part L detailed for building control sign-off.
Building regulations drawings for Great Bookham's an affluent commuter village with its own conservation-area character — structure, fire and Part L detailed for building control sign-off.
Building regulations drawings for Fetcham's largely interwar and postwar suburban semis and detached houses near Leatherhead — structure, fire and Part L detailed for building control sign-off.
Building regulations drawings for Brockham's a green-belt village around a classic green with a conservation area and an Article 4 direction — structure, fire and Part L detailed for building control sign-off.
Building regulations drawings for Westhumble's a small Surrey Hills village of detached rural stock below Box Hill — structure, fire and Part L detailed for building control sign-off.
They are different approvals and most projects need both. This is how they split in Mole Valley.
| Planning permission | Building regulations | |
|---|---|---|
| Question it answers | Should this be built here? | Is it built safely and efficiently? |
| Decided by | Mole Valley District Council planning | Building control body or approved inspector |
| Main drawings | Location, block, proposed plans & elevations | Structural, fire, thermal & construction details |
| Needed for permitted development? | No — a certificate is optional | Yes — always, before work starts |
In conservation areas such as Dorking and Leatherhead, a planning condition can dictate materials that the building regulations details must then also satisfy.
A fixed process built around how Mole Valley projects are approved and inspected — most construction sets are ready within seven days of survey.
Send us your Mole Valley postcode and scheme. We confirm whether you also need planning, which parts of the regulations apply, and whether Mole Valley District Council building control or an approved inspector suits the job.
We measure the existing structure so the construction details, spans and junctions are drawn to the real building rather than an assumption — the base sound structural calculations depend on.
Chartered designers and engineers produce the full-plans set — structure, fire, Part L thermal, drainage and details — with the structural calculations that support every beam and foundation.
We submit the full-plans application to your building control body, resolve any queries before work starts, and revise the drawings free until the set is approved and the work signed off.
They are two separate approvals. Planning permission, decided by Mole Valley District Council, answers whether a scheme should be built at all — its size, look and impact on neighbours. Building regulations, checked by a building control body, answer whether it is built safely and efficiently — structure, fire, insulation and drainage. A Mole Valley project usually needs both, and even permitted-development work that skips planning still needs building control sign-off.
Yes — planning permission is not building control approval. The planning drawings show what the building looks like; building regulations drawings show how it is constructed, and no structural work in Mole Valley can lawfully complete without a building control sign-off. The two sets are drawn together but approved by different bodies, so having one never removes the need for the other. Mole Valley District Council is the decision-maker.
For anything structural in Mole Valley — a loft, an extension or removing a wall — we recommend full plans. The whole construction set is checked and approved before work starts, so a non-compliant detail is caught on paper rather than rebuilt on site. On the borough's victorian and edwardian terraces and villas in the market towns of dorking and leatherhead that certainty matters, and a building notice — which lets a surveyor judge compliance as work proceeds — risks costly rework. Banks and warranty providers also prefer the approved full-plans set that Mole Valley District Council or an approved inspector signs off.
Yes. You can use Mole Valley District Council's building control team or an independent approved inspector — both enforce the same regulations, so it comes down to price, availability and continuity. We draw the full-plans set to the same standard either way and submit it to whichever body you choose, then manage the queries and inspections through to the completion certificate.
Solid-walled period houses — common across Mole Valley, including conservation areas such as Dorking and Leatherhead — are the hardest to bring up to Part L without losing room or altering the fabric. We detail the insulation to hit the required U-values with the least intrusion, using internal or roof-level build-ups and, where a planning condition protects the exterior, methods that satisfy both the energy standard and the heritage requirement at once. Mole Valley District Council is the decision-maker.
We price each Mole Valley job individually, because the structural content and the size of the construction set vary from a single beam to a whole-house refurbishment, and send a fixed, no-obligation quote within one working day. It covers the full-plans drawings and structural calculations with free revisions until sign-off. The building control body's own fee is separate. Call 020 7864 7245 to start. Mole Valley District Council is the decision-maker.
Answer five quick questions and get a free planning score for your exact address — instantly. Then, if you want the full picture, unlock the detailed analysis: your council's live approval rates, local precedents, constraints on your street and a step-by-step route to permission.
Same fixed quotes, same fast drawings — wherever your project is.