Full-plans building regulations drawings for Hertsmere — 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.
Hertsmere Borough Council granted 94% of the householder planning decisions it made in its latest published year — 7 points above the 87% England-wide householder average. Hertsmere contains Aldenham, Bushey Heath High Road, Bushey Heath The Lake conservation areas (Aldenham designated 1973), so materials, fenestration and roof form are assessed against the appraisal, which is where a policy-literate drawing pack earns its keep. Its dominant postwar (1945–1970) housing stock sets the design brief on most streets.
Before permission is required, Class B allows 40m³ of added loft volume on a terrace and 50m³ on a semi or detached house, and Class A allows a 3m single-storey rear extension on a terrace or 4m on a detached house. In conservation areas such as Aldenham, Bushey Heath High Road and Bushey Heath The Lake those rights are removed, so we confirm your exact address before a line is drawn. A validated householder application in Hertsmere is determined against an 8-week statutory target.
Aldenham (conservation area designated in 1973), Bushey Heath High Road (conservation area designated in 1990), Bushey Heath The Lake (conservation area designated in 1998), Bushey High Street (conservation area designated in 1973), Bushey Melbourne Road (conservation area designated in 1973), Elstree Village (conservation area designated in 1976), Letchmore Heath (conservation area designated in 1969), Patchetts Green and Delrow (conservation area designated in 1998), Aldenham East (ward of Hertsmere), Aldenham West (ward of Hertsmere), Bushey Heath (ward of Hertsmere), Bushey St James (ward of Hertsmere), Elstree (ward of Hertsmere) and Shenley (ward of Hertsmere) — these are the Hertsmere pockets our drawings cover most. Heritage designations here include Aldenham, Bushey Heath High Road, Bushey Heath The Lake, Bushey High Street, Bushey Melbourne Road, Elstree Village, Letchmore Heath and Patchetts Green and Delrow. Hertsmere Borough Council weighs each proposal against the adopted Hertsmere local plan and Hertsmere Borough Council's design guidance for householder work, where the 13,370 homes here are 15% 1955-1964, 8% 1965-1972, 7% 1993-1999, which is what sets the realistic roof and rear-projection options. On roofs the borough is shallow gabled roofs typical of that period's building and shallow-pitched roofs and integral garages typical of that period's building, over late-1950s and early-1960s houses (15% of 13,370 homes), late-1960s and early-1970s houses (8%) and 1990s estate houses (7%).
What is permitted in Hertsmere turns on designation first, so that is where we start: Aldenham (conservation area designated in 1973), Bushey Heath High Road (conservation area designated in 1990), Bushey Heath The Lake (conservation area designated in 1998), Bushey High Street (conservation area designated in 1973), Bushey Melbourne Road (conservation area designated in 1973), Elstree Village (conservation area designated in 1976), Letchmore Heath (conservation area designated in 1969) and Patchetts Green and Delrow (conservation area designated in 1998). Inside those boundaries permitted development is curtailed and Hertsmere Borough Council assesses materials, window detail and roof form against the area's own appraisal, so a scheme that would be waved through two streets away can need a full application here.
Beyond the designated areas, Hertsmere takes in Aldenham East, Aldenham West, Bushey Heath, Bushey St James, Elstree and Shenley. No Article 4 direction is recorded for Hertsmere Borough Council, but the district's 8 conservation areas still limit permitted development on those streets.
On stock, Hertsmere is late-1950s and early-1960s houses (15% of 13,370 homes), late-1960s and early-1970s houses (8%) and 1990s estate houses (7%) — which is why shallow gabled roofs typical of that period's building and shallow-pitched roofs and integral garages typical of that period's building govern what a loft or rear projection can realistically be. Hertsmere Borough Council decided 466 householder applications in the latest published year and granted 94%, with 49% issued inside the eight-week target. We draw to that record rather than to a national average.
The full build-period split for Hertsmere runs pre-1900 3% (190 homes), 1900-1918 0% (30 homes), 1919-1929 0% (10 homes), 1930-1939 6% (350 homes), 1945-1954 3% (170 homes), 1955-1964 30% (1,850 homes), 1965-1972 33% (1,990 homes), 1973-1982 4% (260 homes), 1983-1992 5% (310 homes), 1993-1999 4% (220 homes) and 2000-2008 3% (170 homes). That distribution is why pre-1900 detailing dominates the drawings here, and it is measured from council-tax records rather than assumed from the street name.
Hertsmere Borough Council also decides for Aldenham East, Aldenham West, Bushey Heath, Bushey St James, Elstree and Shenley, so a decision in Hertsmere sits inside a wider pattern of decisions we track across the same authority — useful when an officer cites a precedent from the next area over.
Published figures for Hertsmere and Hertsmere Borough Council. These are the numbers that decide what is realistic on your street, so we work from them rather than from national averages.
| Measure | Hertsmere |
|---|---|
| Dwellings recorded | 13,370 |
| Built pre-1900 | 190 (3%) |
| Built 1900-1918 | 30 (0%) |
| Built 1919-1929 | 10 (0%) |
| Built 1930-1939 | 350 (6%) |
| Built 1945-1954 | 170 (3%) |
| Built 1955-1964 | 1,850 (30%) |
| Built 1965-1972 | 1,990 (33%) |
| Built 1973-1982 | 260 (4%) |
| Built 1983-1992 | 310 (5%) |
| Built 1993-1999 | 220 (4%) |
| Built 2000-2008 | 170 (3%) |
| Built before 1919 | 13% |
| Built 1919–1939 | 14% |
| Built 1945–2008 | 60% |
| Conservation areas in Hertsmere | 8 (Aldenham, Bushey Heath High Road…) |
| Conservation areas district-wide | 16 |
| Article 4 directions recorded | 0 |
| Householder applications decided | 466 |
| Householder applications granted | 94% |
| Decided within 8 weeks | 49% |
Dwelling stock from VOA council-tax data at 31 March 2025; conservation-area and Article 4 counts from planning.data.gov.uk (MHCLG); decision figures are Hertsmere Borough Council's own, from MHCLG live table PS2 for the year to 31 March 2026.
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 Hertsmere 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 Hertsmere's stock, which runs to late-1950s and early-1960s houses (15% of 13,370 homes), late-1960s and early-1970s houses (8%) and 1990s estate houses (7%), 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 Hertsmere regardless of planning designation, but in conservation areas such as Aldenham, Bushey Heath High Road, Bushey Heath The Lake, Bushey High Street, Bushey Melbourne Road, Elstree Village, Letchmore Heath and Patchetts Green and Delrow the two processes interact — insulation and window details often have to satisfy Part L and a planning condition at once. No Article 4 direction is recorded for Hertsmere Borough Council, but the district's 8 conservation areas still limit permitted development on those streets. We draw the construction details to reconcile both.
A full-plans set for Hertsmere 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 Hertsmere Borough 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 Hertsmere projects clear planning first, so Hertsmere Borough Council's live decision record below sets the context. Hertsmere Borough Council granted 94% of 466 householder decisions in the year to 31 March 2026, 49% of them inside eight weeks. 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 Hertsmere we recommend the full-plans route — particularly on the borough's late-1950s and early-1960s houses (15% of 13,370 homes) and late-1960s and early-1970s houses (8%), 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 Aldenham, Bushey Heath High Road and Bushey Heath The Lake and the rest of Hertsmere. Where a project sits in a controlled setting — Hertsmere contains Aldenham, Bushey Heath High Road, Bushey Heath The Lake conservation areas (Aldenham designated 1973), so materials, fenestration and roof form are assessed against the appraisal — 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 Hertsmere neighbourhoods and property types where we prepare them most often:
Building regulations drawings for Aldenham's conservation area designated in 1973 — structure, fire and Part L detailed for building control sign-off.
Building regulations drawings for Bushey Heath High Road's conservation area designated in 1990 — structure, fire and Part L detailed for building control sign-off.
Building regulations drawings for Bushey Heath The Lake's conservation area designated in 1998 — structure, fire and Part L detailed for building control sign-off.
Building regulations drawings for Bushey High Street's conservation area designated in 1973 — structure, fire and Part L detailed for building control sign-off.
Building regulations drawings for Bushey Melbourne Road's conservation area designated in 1973 — structure, fire and Part L detailed for building control sign-off.
Building regulations drawings for Elstree Village's conservation area designated in 1976 — 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 Hertsmere.
| Planning permission | Building regulations | |
|---|---|---|
| Question it answers | Should this be built here? | Is it built safely and efficiently? |
| Decided by | Hertsmere Borough 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 Aldenham and Bushey Heath High Road, a planning condition can dictate materials that the building regulations details must then also satisfy.
A fixed process built around how Hertsmere projects are approved and inspected — most construction sets are ready within seven days of survey.
Send us your Hertsmere postcode and scheme. We confirm whether you also need planning, which parts of the regulations apply, and whether Hertsmere Borough 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 Hertsmere Borough 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 Hertsmere 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 Hertsmere 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. Hertsmere Borough Council is the decision-maker.
For anything structural in Hertsmere — 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 late-1950s and early-1960s houses (15% of 13,370 homes) 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 Hertsmere Borough Council or an approved inspector signs off.
Yes. You can use Hertsmere Borough 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 Hertsmere, including conservation areas such as Aldenham and Bushey Heath High Road — 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. Hertsmere Borough Council is the decision-maker.
We price each Hertsmere 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. Hertsmere Borough Council is the decision-maker.
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