The full drawing set for a Portland application — location and block plans, existing and proposed floor plans, elevations and sections, drawn to Dorset Council's validation checklist so the pack is accepted first time, delivered in days and revised free until your decision, with a free approval-odds check first.
Dorset Council granted 95% of the householder planning decisions it made in its latest published year — 8 points above the 87% England-wide householder average. Portland contains Portland Conservation Area 1, Portland Conservation Area 2, Portland Conservation Area 3 conservation areas (Portland Conservation Area 1 designated 1972), so materials, fenestration and roof form are assessed against the appraisal, which is where a policy-literate drawing pack earns its keep. Its dominant Victorian (1837–1901) and postwar (1945–1970) housing stock sets the design brief on most streets.
Under Class B, a rear dormer stays permitted development up to 40m³ of added roof volume on a terrace or 50m³ on a semi-detached or detached house, while Class A allows a single-storey rear extension of 3m beyond the original rear wall on a terrace and 4m on a detached house before a full application is needed. Portland carries at least one Article 4 direction, and conservation areas including Portland Conservation Area 1, Portland Conservation Area 2 and Portland Conservation Area 3 remove those rights outright, so we confirm your exact address before a line is drawn. A validated householder application in Portland is determined against an 8-week statutory target.
Portland Conservation Area 1 (conservation area designated in 1972), Portland Conservation Area 2 (conservation area designated in 2017), Portland Conservation Area 3 (conservation area designated in 2017), Portland Conservation Area 4 (conservation area designated in 2017), Portland Conservation Area 5 (conservation area designated in 2017), Portland Conservation Area 6 (conservation area designated in 2017), The Grove Conservation Area 1 (conservation area designated in 1981), The Grove Conservation Area 2 (conservation area designated in 2017), The Grove Conservation Area 3 (conservation area designated in 2017), The Grove Conservation Area 4 (conservation area designated in 1981), Underhill Conservation Area 1 (conservation area designated in 1976), Underhill Conservation Area 2 (conservation area designated in 2014), Underhill Conservation Area 3 (conservation area designated in 2017), Underhill Conservation Area 4 (conservation area designated in 2017), Underhill Conservation Area 5 (conservation area designated in 2014), Underhill Conservation Area 6 (conservation area designated in 2014), Underhill Conservation Area 7 (conservation area designated in 2014), Underhill Conservation Area 8 (conservation area designated in 2014), Underhill Conservation Area 9 (conservation area designated in 2014), Weston Conservation Area 1 (conservation area designated in 1994), Weston Conservation Area 2 (conservation area designated in 2014), Weston Conservation Area 3 (conservation area designated in 2014) and Weston Conservation Area 4 (conservation area designated in 2014) — these are the Portland pockets our drawings cover most. Heritage designations here include Portland Conservation Area 1, Portland Conservation Area 2, Portland Conservation Area 3, Portland Conservation Area 4, Portland Conservation Area 5, Portland Conservation Area 6, The Grove Conservation Area 1, The Grove Conservation Area 2, The Grove Conservation Area 3, The Grove Conservation Area 4, Underhill Conservation Area 1, Underhill Conservation Area 2, Underhill Conservation Area 3, Underhill Conservation Area 4, Underhill Conservation Area 5, Underhill Conservation Area 6, Underhill Conservation Area 7, Underhill Conservation Area 8, Underhill Conservation Area 9, Weston Conservation Area 1, Weston Conservation Area 2, Weston Conservation Area 3 and Weston Conservation Area 4. Dorset Council weighs each proposal against the adopted Dorset local plan and Dorset Council's design guidance for householder work, where the 6,330 homes here are 25% pre-1900, 19% 1965-1972, 11% 1973-1982, which is what sets the realistic roof and rear-projection options. On roofs the borough is steeply pitched slate roofs, valley gutters and party parapets typical of pre-1900 building and shallow-pitched roofs and integral garages typical of that period's building, over Victorian and earlier houses (25% of 6,330 homes), late-1960s and early-1970s houses (19%) and 1970s and early-1980s houses (11%).
Portland's designated heritage is specific, and it is the first thing we check against your address: Portland Conservation Area 1 (conservation area designated in 1972), Portland Conservation Area 2 (conservation area designated in 2017), Portland Conservation Area 3 (conservation area designated in 2017), Portland Conservation Area 4 (conservation area designated in 2017), Portland Conservation Area 5 (conservation area designated in 2017), Portland Conservation Area 6 (conservation area designated in 2017), The Grove Conservation Area 1 (conservation area designated in 1981), The Grove Conservation Area 2 (conservation area designated in 2017), The Grove Conservation Area 3 (conservation area designated in 2017), The Grove Conservation Area 4 (conservation area designated in 1981), Underhill Conservation Area 1 (conservation area designated in 1976), Underhill Conservation Area 2 (conservation area designated in 2014), Underhill Conservation Area 3 (conservation area designated in 2017), Underhill Conservation Area 4 (conservation area designated in 2017), Underhill Conservation Area 5 (conservation area designated in 2014), Underhill Conservation Area 6 (conservation area designated in 2014), Underhill Conservation Area 7 (conservation area designated in 2014), Underhill Conservation Area 8 (conservation area designated in 2014), Underhill Conservation Area 9 (conservation area designated in 2014), Weston Conservation Area 1 (conservation area designated in 1994), Weston Conservation Area 2 (conservation area designated in 2014), Weston Conservation Area 3 (conservation area designated in 2014) and Weston Conservation Area 4 (conservation area designated in 2014). Inside those boundaries permitted development is curtailed and Dorset 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.
Dorset Council has 77 recorded Article 4 directions — check the address before assuming PD applies in Portland.
On stock, Portland is Victorian and earlier houses (25% of 6,330 homes), late-1960s and early-1970s houses (19%) and 1970s and early-1980s houses (11%) — which is why steeply pitched slate roofs, valley gutters and party parapets typical of pre-1900 building and shallow-pitched roofs and integral garages typical of that period's building govern what a loft or rear projection can realistically be. Dorset Council decided 1,261 householder applications in the latest published year and granted 95%, with 78% issued inside the eight-week target. Those are the numbers our drawings are prepared against.
The full build-period split for Portland runs pre-1900 25% (1,590 homes), 1900-1918 6% (350 homes), 1919-1929 2% (130 homes), 1930-1939 3% (180 homes), 1945-1954 7% (460 homes), 1955-1964 3% (190 homes), 1965-1972 19% (1,200 homes), 1973-1982 11% (700 homes), 1983-1992 5% (300 homes), 1993-1999 1% (60 homes) and 2000-2008 8% (490 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.
Dorset Council also decides for Beacon, Beaminster, Blackmore Vale, Blandford, Chalk Valleys, Charminster St Mary's, Chickerell and Cranborne & Alderholt, so a decision in Portland 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.
The Article 4 directions recorded for this council include 1-3 The Lane, Kingston, Corfe Castle, 10 Cornwall Road, Swanage, 6 Burlington Road, Swanage and Avon Castle & Matchams Park Estate. Each removes a specific permitted-development right inside its own boundary, which is why the check is done on the address rather than on the town.
Published figures for Portland and Dorset Council. These are the numbers that decide what is realistic on your street, so we work from them rather than from national averages.
| Measure | Portland |
|---|---|
| Dwellings recorded | 6,330 |
| Built pre-1900 | 1,590 (25%) |
| Built 1900-1918 | 350 (6%) |
| Built 1919-1929 | 130 (2%) |
| Built 1930-1939 | 180 (3%) |
| Built 1945-1954 | 460 (7%) |
| Built 1955-1964 | 190 (3%) |
| Built 1965-1972 | 1,200 (19%) |
| Built 1973-1982 | 700 (11%) |
| Built 1983-1992 | 300 (5%) |
| Built 1993-1999 | 60 (1%) |
| Built 2000-2008 | 490 (8%) |
| Built before 1919 | 31% |
| Built 1919–1939 | 5% |
| Built 1945–2008 | 54% |
| Conservation areas in Portland | 23 (Portland Conservation Area 1, Portland Conservation Area 2…) |
| Conservation areas district-wide | 311 |
| Article 4 directions recorded | 77 |
| Householder applications decided | 1,261 |
| Householder applications granted | 95% |
| Decided within 8 weeks | 78% |
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 Dorset Council's own, from MHCLG live table PS2 for the year to 31 March 2026.
Whatever you are building, Dorset Council decides it from the same core set. A location plan at 1:1250 fixes the site on the map with the red-line boundary; a block plan at 1:500 shows the property in its plot; then existing and proposed floor plans and elevations at 1:100 or 1:50 show the house as it is and as it will be. Larger schemes add a section and, where policy requires, a design and access statement. Miss one and the application is returned invalid before an officer has looked at it.
The drawings are also the argument. Dorset Council assesses each proposal against the adopted Dorset local plan and Dorset Council's design guidance for householder work, and the elevations are where the case is won or lost — ridge and eaves heights, window positions, materials and how the change reads from the street. On Portland's stock, which runs to Victorian and earlier houses (25% of 6,330 homes), late-1960s and early-1970s houses (19%) and 1970s and early-1980s houses (11%), the same scheme is drawn differently to answer the concerns officers raise here. Portland contains Portland Conservation Area 1, Portland Conservation Area 2, Portland Conservation Area 3 conservation areas (Portland Conservation Area 1 designated 1972), so materials, fenestration and roof form are assessed against the appraisal, so the pack is built to pre-empt exactly that.
Where the property sits in a conservation area — Portland Conservation Area 1, Portland Conservation Area 2, Portland Conservation Area 3, Portland Conservation Area 4, Portland Conservation Area 5, Portland Conservation Area 6, The Grove Conservation Area 1, The Grove Conservation Area 2, The Grove Conservation Area 3, The Grove Conservation Area 4, Underhill Conservation Area 1, Underhill Conservation Area 2, Underhill Conservation Area 3, Underhill Conservation Area 4, Underhill Conservation Area 5, Underhill Conservation Area 6, Underhill Conservation Area 7, Underhill Conservation Area 8, Underhill Conservation Area 9, Weston Conservation Area 1, Weston Conservation Area 2, Weston Conservation Area 3 and Weston Conservation Area 4 among Portland's — validation is stricter still, often demanding heritage detail and sometimes additional plans. Dorset Council has 77 recorded Article 4 directions — check the address before assuming PD applies in Portland. We confirm the designation before drawing so the pack meets the higher bar first time.
Dorset Council validates against a published checklist before it assesses anything. A typical householder application needs each of these, correctly scaled and labelled:
We draw the complete set — location and block plans, existing and proposed plans, elevations and any section — to Dorset Council's checklist, then lodge it on the Planning Portal, manage validation and answer case-officer queries so the application is decided on its merits, not bounced on a technicality.
Below is Dorset Council's real householder decision record, drawn from official planning statistics and refreshed as new data lands. Dorset Council granted 95% of its householder applications in the year to 31 March 2026, and Portland Conservation Area 1 shapes what is approved here. A complete, correctly scaled pack that answers those concerns on the elevations is validated faster and refused less often than one that leaves them for the officer to raise.
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.
Two different things sink an application, and they happen at two different stages. First is validation: a missing block plan, an unscaled elevation, no red line, no north point — Dorset Council returns the whole submission and the clock never starts. Getting the pack right at this stage is purely mechanical, and it is where a lot of self-submitted Portland applications lose weeks. We draw to the checklist so this never happens.
Second is the planning judgement itself, once the pack is valid. The 6,330 homes here are 25% pre-1900, 19% 1965-1972, 11% 1973-1982, which is what sets the realistic roof and rear-projection options. Across Portland Conservation Area 1, Portland Conservation Area 2 and Portland Conservation Area 3 the recurring refusals are about scale, overlooking and how the proposal sits against its neighbours — all of which are settled on the drawings. We draw the scheme to answer them before submission rather than after a refusal.
The application pack is the same discipline whatever the project. A few of the Portland neighbourhoods and property types we prepare drawings for most often:
Planning drawings for Portland Conservation Area 1's conservation area designated in 1972 — scaled, validation-ready and drawn to Dorset Council's guidance.
Planning drawings for Portland Conservation Area 2's conservation area designated in 2017 — scaled, validation-ready and drawn to Dorset Council's guidance.
Planning drawings for Portland Conservation Area 3's conservation area designated in 2017 — scaled, validation-ready and drawn to Dorset Council's guidance.
Planning drawings for Portland Conservation Area 4's conservation area designated in 2017 — scaled, validation-ready and drawn to Dorset Council's guidance.
Planning drawings for Portland Conservation Area 5's conservation area designated in 2017 — scaled, validation-ready and drawn to Dorset Council's guidance.
Planning drawings for Portland Conservation Area 6's conservation area designated in 2017 — scaled, validation-ready and drawn to Dorset Council's guidance.
The route decides what Dorset Council needs and how long it takes. This is how the common Portland routes compare.
| Route | When it applies | Core drawings | Typical decision |
|---|---|---|---|
| Householder application | Extensions and alterations to a single house | Location, block, existing & proposed plans and elevations | About 8 weeks |
| Full application | Flats, new units, changes of use | As householder plus site plan and often a section | 8–13 weeks |
| Lawful development certificate | Confirming a scheme is permitted development | Existing & proposed plans and elevations to prove PD limits | About 8 weeks |
| Prior approval | Larger single-storey rear extensions | Plans and elevations plus neighbour notification | About 6 weeks |
In a conservation area such as Portland Conservation Area 1 and Portland Conservation Area 2, householder permitted-development rights are often restricted, so a full application and heritage detail may be required.
A fixed process built around how Dorset Council validates and decides — most drawing sets are submission-ready within seven days of survey.
Send us your Portland postcode and what you want to build. We confirm your conservation and Article 4 status, tell you which application route applies, and score your odds against live Dorset Council decisions.
We measure the property and plot so the existing plans and elevations are accurate to the millimetre — the base every proposed drawing and every officer judgement is built on.
Chartered designers produce the full validation pack — location and block plans, existing and proposed plans, elevations, any section and a design and access statement — drawn to Dorset Council's checklist.
We lodge the application on the Planning Portal, manage validation and case-officer queries, and revise the drawings free until Dorset Council issues its decision.
Dorset Council validates a householder application against a set list: a location plan at 1:1250 with a red-line boundary, a block plan at 1:500, and existing and proposed floor plans and elevations at 1:100 or 1:50, each with a scale bar and north point. Larger schemes and most conservation-area work also need a design and access statement. If any of these is missing or unscaled the application is returned invalid before it is assessed. This applies to your Portland address specifically.
Almost always because the drawing pack is incomplete or wrongly scaled — a missing block plan, an elevation with no scale, no red line on the location plan, no north point. Dorset Council checks the pack against its validation list before an officer ever assesses the scheme, so these purely technical gaps cost weeks. Drawing to the checklist from the outset is the simplest way to avoid a return. This applies to your Portland address specifically.
Yes. We prepare the full drawing set, lodge it on the Planning Portal on your behalf, pay the Dorset Council fee where you prefer us to, and then manage validation and case-officer questions through to the decision. You get the reference number and updates without dealing with the portal or the council yourself. This applies to your Portland address specifically.
A householder application is a statutory eight weeks from validation, and a full application eight to thirteen weeks depending on scale. The date that matters is validation, not submission — an invalid pack never starts the clock. Because we draw to Dorset Council's checklist the application validates quickly, so the statutory period begins without the delay a returned pack causes. This applies to your Portland address specifically.
You do not strictly need a planning application, but scaled existing and proposed drawings are still worth having: a lawful development certificate from Dorset Council proves the scheme is permitted development, which lenders and buyers increasingly ask for, and your builder needs the drawings to price and build. In a conservation area such as Portland Conservation Area 1 and Portland Conservation Area 2, permitted-development rights are often removed, so a full application may be needed after all — we confirm which before you commit.
We price each Portland job individually — the scope of the survey and the size of the drawing set vary from a simple rear extension to a whole-house scheme — and send a fixed, no-obligation quote within one working day. It covers the full validation pack with free revisions until Dorset Council decides. The Dorset Council application fee is separate and paid to the council. Call 020 7864 7245 to start.
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Same fixed quotes, same fast drawings — wherever your project is.