Orangery and conservatory drawings for Caversham homes — checked against the Class A rear limits and the 30m² building-regulations exemption, drawn to Reading Borough Council's guidance and revised free until your decision.
Reading Borough Council granted 87% of the householder planning decisions it made in its latest published year — level with the 87% England-wide householder average. Sloping plots on the Caversham Heights ridge are assessed for the effect of roof and rear additions on long views across the Thames valley, 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.
Class A and Class B set the thresholds — a rear dormer to 40m³ on a terrace or 50m³ on a semi or detached, and a single-storey rear extension to 3m on a terrace or 4m on a detached house — beyond which Reading Borough Council needs a full application. In conservation areas such as St Peter's (Caversham), Surley Row (Emmer Green) and Horncastle those rights are removed, so we confirm your exact address before a line is drawn. A validated householder application in Caversham is determined against an 8-week statutory target.
Caversham Heights (interwar and detached houses climbing the hill above the Thames), Lower Caversham (Victorian and Edwardian terraces on the flat riverside streets), Emmer Green (an older village core wrapped in postwar suburban housing), St Peter's (Victorian streets around the parish church in the St Peter's conservation area), Surley Row (a historic lane of older cottages north of the river) and Caversham Centre (Edwardian shopping parades and terraces off Church Road) — these are the Caversham pockets our drawings cover most. Heritage designations here include St Peter's (Caversham), Surley Row (Emmer Green) and Horncastle. Reading Borough Council weighs each proposal against the Reading Borough Local Plan (2019), where riverside plots near the Thames are read against flood-zone policy on top of the usual householder tests. On roofs the borough is pitched and gabled roofs on the terraces and Edwardian villas and hipped roofs on the interwar and detached houses, over Victorian and Edwardian red-brick terraces near the river, interwar and detached houses on the Caversham Heights slopes and postwar and older village housing around Emmer Green.
The difference is not marketing. A conservatory is predominantly glazed — at least three quarters of the roof and half of the walls — which is what earns it the building-regulations exemption. An orangery has a solid masonry perimeter with a glazed lantern set into a flat roof, so it usually reads as a conventional extension for building control and has to meet Part L thermal standards, Part A structure and Part B fire like any other room.
Both are judged the same way for planning: as rear extensions, against the Class A depth, height and eaves limits, and against the Reading Borough Local Plan (2019). Caversham is largely Victorian and Edwardian red-brick terraces near the river, interwar and detached houses on the Caversham Heights slopes and postwar and older village housing around Emmer Green, and the design question is usually whether the glazing reads as a lightweight addition to that stock or as a bolted-on conservatory kit. On period houses, an orangery with a properly proportioned lantern almost always sits better than a full-height glazed box.
In conservation areas such as St Peter's (Caversham) and Surley Row (Emmer Green), rear glazing is assessed on visibility from the street and on the effect on the rear elevation's character. Caversham sits outside Reading's HMO Article 4 direction, which covers parts of Park, Redlands and Katesgrove wards south of the Thames, so householder permitted-development rights here run as normal outside the conservation areas around St Peter's and Emmer Green.
Many conservatories are permitted development. You will need an application to Reading Borough Council where any of these apply:
We check the scheme against the Class A planning limits and against the building-regulations exemption at the same time, so you know before committing whether you are building an exempt conservatory or a fully regulated room.
Below is Reading Borough Council's real householder decision record, drawn from official planning statistics and refreshed as new data lands. Caversham consents most householder schemes, but its hillside outlook over the Thames and the older cores at St Peter's, Emmer Green and Surley Row are where design and setting decide the harder cases. Glazed rear additions are judged on depth, eaves height and how the glazing meets the existing elevation.
Source: MHCLG planning application statistics (householder decisions, England, 1 April 2025 - 31 March 2026). Compare every borough on our London approval-rate league table.
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Across Caversham Heights, Lower Caversham and Emmer Green, the schemes that succeed keep the eaves below the neighbour's ground-floor cill line, set the glazing back from the boundary, and use a solid parapet or brick perimeter to tie the addition into the house. On victorian and edwardian red-brick terraces near the river, a lantern set in a flat roof usually reads better than a pitched glazed roof, and it avoids the summer overheating that makes full conservatories unusable for months a year.
Sloping plots on the Caversham Heights ridge are assessed for the effect of roof and rear additions on long views across the Thames valley. The decision worth making early is whether to keep the separating doors. Keeping them preserves the building-regulations exemption but leaves you with a room that is not part of the house; removing them creates one continuous space but brings the whole addition inside Part L, which changes the glazing specification and usually the heating design too. We set out both versions before you commit.
We draw glazed rear additions across Caversham. A few of the areas where they come up most often:
Orangery and conservatory drawings for Caversham Heights — interwar and detached houses climbing the hill above the Thames — checked against the Class A limits and drawn to Reading Borough Council's guidance.
Orangery and conservatory drawings for Lower Caversham — Victorian and Edwardian terraces on the flat riverside streets — checked against the Class A limits and drawn to Reading Borough Council's guidance.
Orangery and conservatory drawings for Emmer Green — an older village core wrapped in postwar suburban housing — checked against the Class A limits and drawn to Reading Borough Council's guidance.
Orangery and conservatory drawings for St Peter's — Victorian streets around the parish church in the St Peter's conservation area — checked against the Class A limits and drawn to Reading Borough Council's guidance.
Orangery and conservatory drawings for Surley Row — a historic lane of older cottages north of the river — checked against the Class A limits and drawn to Reading Borough Council's guidance.
Orangery and conservatory drawings for Caversham Centre — Edwardian shopping parades and terraces off Church Road — checked against the Class A limits and drawn to Reading Borough Council's guidance.
The planning test is the same for both. The building-regulations test is not.
| Structure | Planning route | Building regulations | Practical effect |
|---|---|---|---|
| Conservatory under 30m², doors retained | Class A rear extension limits | Largely exempt | Cheaper build, unheated in winter |
| Conservatory, doors removed | Class A rear extension limits | Part L applies in full | Continuous space, higher spec glazing |
| Orangery with solid perimeter and lantern | Class A rear extension limits | Fully regulated | Usable year round, better on period houses |
| Any of the above beyond the depth limits | Full householder application | As above | 8-week determination |
| Any of the above on designated land | Full householder application | As above | Design and visibility assessed |
Planning limits from the GPDO 2015, Schedule 2, Part 1, Class A; exemption criteria from the Building Regulations 2010, Schedule 2, Class 7.
A fixed process covering both consents, because they pull in different directions.
Send us your Caversham postcode and house type. We confirm the Class A limits that apply, check designation status, and score your odds against live Reading Borough Council decisions.
We measure the rear elevation, eaves and ground levels, and the neighbouring boundary — the numbers that decide both the projection limit and the 2-metre eaves rule.
Chartered designers develop the orangery or conservatory to your brief, and we set out clearly whether it stays inside the building-regulations exemption or becomes a fully regulated room.
We submit the certificate or application, manage validation and officer queries, and revise free until Reading Borough Council decides.
Often not. A conservatory is treated as a rear extension, so it can be permitted development within the Class A limits — 3 metres of projection on a terrace or semi, 4 metres on a detached house, with eaves under 3 metres where it sits within 2 metres of a boundary. In Caversham you will need an application to Reading Borough Council beyond those limits, and on designated land such as St Peter's (Caversham) and Surley Row (Emmer Green).
A conservatory is largely exempt if it is under 30 square metres, at ground level, separated from the house by external-quality doors, and has at least 75% of its roof and 50% of its walls glazed. Glazing, electrics and any drainage work still have to comply. Remove the separating doors and the exemption falls away — the space becomes part of the house and Part L thermal standards apply. This applies to your Caversham address specifically. Reading Borough Council is the decision-maker.
For planning, none — both are rear extensions assessed against the same Class A limits by Reading Borough Council. The difference is in building control: an orangery's solid perimeter and flat roof with a lantern usually means it fails the glazing test for exemption, so it is fully regulated. That is why an orangery costs more to build but is comfortable in January. This applies to your Caversham address specifically.
Usually yes at the rear, though permitted-development rights are narrower on designated land and an Article 4 direction can remove them entirely. The assessment turns on whether the addition is visible from the street and how it meets the original rear elevation. A restrained orangery in matching brick with a lantern is consistently easier to get through than a proprietary glazed conservatory. This applies to your Caversham address specifically. Reading Borough Council is the decision-maker.
A fully glazed roof will, unless it is specified for it. That is the practical reason most of our clients end up building an orangery instead: a solid insulated roof perimeter with a lantern gives daylight without the greenhouse effect, and keeps the space usable across the year. We raise it at design stage because it is much cheaper to solve on paper than after the build. This applies to your Caversham address specifically. Reading Borough Council is the decision-maker.
If you excavate foundations within 3 metres of a neighbouring structure and deeper than its foundations, or build on the boundary itself, the Party Wall etc. Act 1996 applies and notice must be served. That is separate from Reading Borough Council's planning decision. We flag it at design stage so the notice period does not delay the start on site. This applies to your Caversham address specifically.
We quote each Caversham orangery or conservatory individually, because the structure and the roof form change the work considerably, and send a fixed, no-obligation quote within one working day. It covers the full drawing pack with free revisions until Reading Borough Council approves. Call 020 7864 7245 to start.
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