House extensions in Anglesey

Anglesey received 228 householder applications in the last 12 months - about 4 a week. Garage works and porches are the most common. Of the 145 decided so far, 141 were approved. If you're planning your own, the applications below show what people nearby applied for and how the council decided.

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Showing 50 of 73 applications
2 days ago Valid FPL/2026/215

Ysgol Syr Thomas Jones, Amlwch

Cais llawn ar gyfer gosod gorchydd amddiffyn o'r tywydd ar y to fflat, ynghyd ac ail osod ffenestri a ffenestri to yn / Full application to install fl...

Full Planning Permission Anglesey
29 Sept 2026 Valid HHP/2026/157

Hen Felin, Llaneilian

Cais llawn ar gyfer addasu ac ehangu yn / Full application for alterations and extensions at

Householder planning permission Anglesey
25 Sept 2026 Valid FPL/2026/193

Bryn Awelon & Gwynfryn, Llangaffo

Cais llawn ar gyfer ymestyn y cwrtil ynghyd a creu 4 lle parcio a gwaith cysylltiedig yn / Full application for extension to curtilage together with t...

Full Planning Permission Anglesey
22 Sept 2026 Valid HHP/2026/155

Cefn Coch, Lon Isallt, Bae Treaddur / Cefn Coch, Lon Isallt, Trearddur Bay

Cais llawn ar gyfer codi anecs preswyl yn / Full application for the erection of a residential annex at

Householder planning permission Anglesey
22 Sept 2026 Valid HHP/2026/156

16 Ffordd Llechi, Rhosneigr

Cais llawn am dymchwel, addasu ac ehangu yn / Full application for demolition, alterations and extensions at

Householder planning permission Anglesey
22 Sept 2026 Valid HHP/2026/154

39 Rhianfa, Benllech / 39 Rhianfa, Benllech

Cais llawn ar gyfer dymchwel y porth presennol ynghyd a addasu ag ehangu yn / Full application for demolition of existing porch together with alterati...

Householder planning permission Anglesey
22 Sept 2026 Valid HHP/2026/153

Ty Oriel, Rhydwyn

Cais llawn ar gyfer addasu ac ehangu yn / Full application for alterations and extensions at

Householder planning permission Anglesey
22 Sept 2026 Valid HHP/2026/150

Gwlefor, Malltraeth

Cais llawn ar gyfer addasu ac ehangu yn / Full application for alterations and extensions at

Householder planning permission Anglesey
22 Sept 2026 Processing HHP/2026/58

Ty Capel Ebenezer, Llanfaethlu

Cais llawn ar gyfer codi dau adeilad allanol yn / Full application for the erection of two outbuildings at

Householder planning permission Anglesey
22 Sept 2026 Valid HHP/2026/28

The Anchorage, Tyn Y Gongl

Cais llawn ar gyfer addasu ac ehangu yn / Full application for alterations and extensions at

Householder planning permission Anglesey
18 Sept 2026 Valid FPL/2026/202

Glan y Menai, Ffordd Biwmares, Glyngarth, Porthaethwy / Glan y Menai, Beaumaris Road, Glyngarth, Menai Bridge

Cais llawn ar gyfer dymchwel y dau annedd presennol, codi annedd yn ei le ynghyd ag anecs atodol yn / Full application for demolition of the two exist...

Full Planning Permission Anglesey
18 Sept 2026 Closed SCR/2026/38

Glan y Menai, Ffordd Biwmares, Glyngarth, Porthaethwy / Glan y Menai, Beaumaris Road, Glyngarth, Menai Bridge

Barn sgrinio ar gyfer dymchwel y dau annedd presennol, codi annedd yn ei le ynghyd ag anecs atodol yn / Screening opinion for demolition of the two ex...

Screening Opinion Anglesey
16 Sept 2026 Valid HHP/2026/152

Brackenwood, 39 Lon Conwy, Benllech

Cais llawn ar gyfer dymchwel y porth presennol, codi porth newydd ar ty blaen ynghyd a creu ardal decio yn y cefn yn / Full application for the demol...

Householder planning permission Anglesey
15 Sept 2026 Valid HHP/2026/151

Lletyr Wennol, Marianglas

Cais llawn am godi anecs hunan gynhaliol ar gyfer defnydd ategol i'r brif annedd yn / Full application for the erection of a self contained annex anci...

Householder planning permission Anglesey
11 Sept 2026 Valid FPL/2026/194

Ty Rhos, Pontrhydybont / Ty Rhos, Four Mile Bridge

Cais llawn ar gyfer dymchwel yr annedd presennol a codi annedd newydd yn ei le gyda garej arwahan, estyniad i'r cwrtil ynghyd â gwaith dwr ac arddull ...

Full Planning Permission Anglesey
10 Sept 2026 Valid HHP/2026/112

Swn Y Wylan, Warren Road, Rhosneigr

Cais ôl-weithredol ar gyfer addasu ac ehangu yn / Retrospective application for alterations and extensions at

Householder planning permission Anglesey
9 Sept 2026 Valid HHP/2026/141

2 Fern Hill, Benllech

Cais ôl-weithredol ar gyfer cadw ffens yn / Retrospective application for retention of a fence at

Householder planning permission Anglesey
8 Sept 2026 Valid HHP/2026/146

Gwynyfryn, Llanfaelog

Cais llawn ar gyfer addasu ac ehangu yn / Full application for alterations and extensions at

Householder planning permission Anglesey
8 Sept 2026 Valid HHP/2026/149

Gorffwysfa, Moelfre

Cais llawn am estyniad unllawr yn / Full application for a single storey extension at

Householder planning permission Anglesey
7 Sept 2026 Valid HHP/2026/145

Y Bwthyn, 30 Ravenspoint Road, Bae Trearddur / Y Bwthyn, 30 Ravenspoint Road, Trearddur Bay

Cais llawn ar gyfer dymchwel y garej presennol yn ogystal â addasu ac ehangu yn / Full application for the demolition of the existing garage together ...

Householder planning permission Anglesey
7 Sept 2026 Valid FPL/2026/176

Glan Traeth, Lôn Felin Stanley, Bae Trearddur / Glan Traeth, Stanley Mill Lane, Trearddur Bay

Cais llawn ar gyfer trosi adeilad allanol yn anecs ynghyd â gwaith cysylltiedig, estyniad i'r cwrtil a pecyn trin carffosiaeth newydd yn / Full appli...

Householder planning permission Anglesey
3 Sept 2026 Under Review HHP/2026/148

Ty Ynys, Lon Ganol, Dwyran

Cais llawn ar gyfer addasu ac ehangu yn / Full application for alterations and extensions at

Householder planning permission Anglesey
2 Sept 2026 Valid FPL/2026/174

Bwthyn Penterfyn, Rhostrehwfa

Cais llawn ar gyfer addasu ag ehangu'r annedd, dymchwel yr adeilad allanol presennol, codi garej ar wahan, estyniad i'r cwrtil preswyl ac acaddasiadau...

Full Planning Permission Anglesey
28 Aug 2026 Under Review HHP/2026/129

Swn y Môr, Pontrhydybont / Swn y Môr, Four Mile Bridge

Cais llawn ar gyfer dymchwel yr anecs bresennol a chodi anecs newydd yn cynnwys pwmp gwres ffynhonnell aer yn / Full application for the demolition of...

Householder planning permission Anglesey
27 Aug 2026 Under Review HHP/2026/136

Haulfryn, Overstrand Avenue, Rhosneigr

Cais llawn ar gyfer addasu ac ehangu yn / Full application for alterations and extensions at

Householder planning permission Anglesey
26 Aug 2026 Under Review FPL/2026/181

Hen Lys Ynadon, Stryd Stanley, Caergybi / Old Magistrates Court, Stanley Street, Holyhead

Cais llawn ar gyfer trosi'r hen lys ynadon yn chwe uned breswyl fforddiadwy yn ogystal â dymchwel rhannol, addasu, ehangu a gwaith cysylltiedig yn / F...

Full Planning Permission Anglesey
26 Aug 2026 Valid FPL/2026/191

Nyhavn, Llanrhuddlad

Cais llawn ar gyfer trosi y garej i anecs ynghyd â addasu ac ehangu yn / Full application for the conversion of an existing garage into a self-contain...

Full Planning Permission Anglesey
21 Aug 2026 Valid LBC/2026/25

Bwthyn Rheilffordd, Llandyfrydog

Caniatâd Adeilad Rhestredig ar gyfer newidiadau i'r ffenestr gefn a gosod pwmp gwres ffynhonnell aer yn / Listed Building Consent for alterations to t...

Listed Building Consent Anglesey
21 Aug 2026 Under Review HHP/2026/142

Cenlyn, Ffordd Llundain, Bodedern / Cenlyn, London Road, Bodedern

Cais llawn ar gyfer lledu'r fynedfa bresennol yn / Full application for the widening of the existing access at

Householder planning permission Anglesey
20 Aug 2026 Valid HHP/2026/140

Crewe Green Cottage, Glanrafon, Llangoed

Cais llawn ar gyfer addasu ac ehangu yn / Full application for alterations and extensions at

Householder planning permission Anglesey
19 Aug 2026 Valid HHP/2026/139

Plas Bach, Rhoscolyn

Cais llawn ar gyfer addasu ac ehangu yn / Full application for alterations and extensions at

Householder planning permission Anglesey
14 Aug 2026 Valid HHP/2026/86

The White House, Llanfechell

Cais llawn ar gyfer addasu ac ehangu ynghyd â throsi garej i anecs yn / Full application for alterations and extensions together with conversion of th...

Householder planning permission Anglesey
14 Aug 2026 Approved 1 Oct HHP/2026/137

3 Glanffrwd, Ffordd Penmynydd, Penmynydd

Cais llawn ar gyfer addasu ac ehangu yn / Full application for alterations and extensions at

Householder planning permission Anglesey
13 Aug 2026 Under Review HHP/2026/117

Cae Fabli, Caergybi / Cae Fabli, Holyhead

Cais llawn ar gyfer addasu ac ehangu yn cynnwys porth car a balconis yn / Full application for alterations and extensions including car port and balco...

Householder planning permission Anglesey
12 Aug 2026 Valid FPL/2026/173

The Adelphi, 3 Lon y Cei/Quay Street, Amlwch

Cais llawn ar gyfer dymchwel y seler/storfa bresennol ac adeiladu estyniad ystafell ddigwyddiadau deulawr yn / Full application for the demolition of ...

Full Planning Permission Anglesey
11 Aug 2026 Valid LBC/2026/23

Clorach Bach, Llanerchymedd

Caniatâd Adeilad Rhestredig ar gyfer dymchwel, addasu ac ehangu yn / Listed Building Consent for demolition, alterations and extensions at

Listed Building Consent Anglesey
11 Aug 2026 Valid HHP/2026/134

Clorach Bach, Llanerchymedd

Cais llawn ar gyfer dymchwel, addasu ac ehangu yn / Full application for demolition, alterations and extensions at

Householder planning permission Anglesey
10 Aug 2026 Valid HHP/2026/130

Arlanfor, Moelfre

Cais llawn ar gyfer dymchwel, addasu ac ehangu ynghyd â chodi balconi yn / Full application for demolition, alterations and extensions together with e...

Householder planning permission Anglesey
10 Aug 2026 Approved 30 Sep HHP/2026/93

Glyn Ewryd, Rhosgoch.

Cais llawn i drosi rhan o'r adeilad allanol presennol i fod yn anecs i'w ddefnyddio'n ategol i'r prif annedd yn / Full application to convert part of ...

Householder planning permission Anglesey
10 Aug 2026 Approved 30 Sep FPL/2026/132

5 Ffordd yr Coleg, Porthaethwy / 5 Askew Street, Menai Bridge

Cais llawn ar gyfer dymchwel, addasu ac ehangu yn / Full application for demolition, extensions and alterations at

Full Planning Permission Anglesey
7 Aug 2026 Approved 1 Sep MAH/2026/11

Nicholas Croft, Porth Llechog / Nicholas Croft, Bull Bay

Mân newidiadau i gynllun sydd wedi ei ganiatáu yn flaenorol o dan caniatád cynllunio HHP/2024/3 (Cais llawn ar gyfer addasu ac ehangu, codi balconi, t...

Minor Amendment Householder Anglesey
6 Aug 2026 Valid HHP/2026/132

Glandwr, Ffordd Lligwy, Moelfre

Cais llawn ar gyfer dymchwel, addasu ag ehangu yn / Full application for demolition, alterations and extensions at

Householder planning permission Anglesey
6 Aug 2026 Valid HHP/2026/111

Dolffina, 20 Nant Bychan Estate, Moelfre

Cais llawn ar gyfer addasu ac ehangu yn / Full application for alterations and extensions at

Householder planning permission Anglesey
5 Aug 2026 Approved 30 Sep HHP/2026/131

Ty Glan Y Mor, Harrison Drive, Rhosneigr

Cais llawn ar gyfer addasu ag ehangu yn / Full application for alterations and extensions at

Householder planning permission Anglesey
5 Aug 2026 Decided 14 Aug SCR/2026/31

Glan Traeth, Lôn Felin Stanley, Bae Trearddur / Glan Traeth, Stanley Mill Lane, Trearddur Bay

Barn sgrinio ar gyfer trosi adeilad allanol yn anecs ynghyd â gwaith cysylltiedig, estyniad i'r cwrtil a pecyn trin carffosiaeth newydd yn / Screenin...

Screening Opinion Anglesey
5 Aug 2026 Valid FPL/2026/171

Llwyn Onn, Llanddeusant

Cais llawn ar gyfer estyniad i gwrtil a chodi ystafell ardd yn / Full application for an extension to curtilage and erection of a garden room at

Full Planning Permission Anglesey
4 Aug 2026 Approved 23 Sep HHP/2026/79

Tregarne, Ffordd Caergybi, Llanfairpwll / Tregarne, Holyhead Road, Llanfairpwll

Cais llawn ar gyfer addasu ac ehangu ynghyd â chadw'r gwaith presennol yn / Full application for alterations and extensions together with the retentio...

Householder planning permission Anglesey
3 Aug 2026 Valid HHP/2026/128

8 Petersfield Estate, Mynydd Mechell, Amlwch

Cais llawn ar gyfer dymchwel, addasu a ehnagu yn / Full application for demolition, alterations and extension at

Householder planning permission Anglesey
30 Jul 2026 Under Review HHP/2026/127

12 Stad Tyn Berllan, Bryngwran

Cais llawn ar gyfer adeiladu dormer ochr yn / Full application for the construction of a side dormer at

Householder planning permission Anglesey
30 Jul 2026 Approved 23 Sep HHP/2026/126

43 Caer Delyn, Bodffordd

Cais llawn ar gyfer codi ystafell ardd yn / Full application for the erection of a garden room at

Householder planning permission Anglesey
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Frequently asked questions

When do you need planning permission for a house extension?
Single-storey rear extensions up to 4m (detached) or 3m (semi-detached / terraced) are usually permitted development. Two-storey extensions, anything in a conservation area, or larger projects almost always need a planning application.
What's the difference between planning permission and permitted development?
Permitted development rights let you build certain things without applying for planning permission, subject to specified limits. Anything outside those limits, whether taller, larger or in a protected area, needs full planning permission.
How long does a householder application take?
The statutory target is 8 weeks from validation. Most simple householder extensions are decided within that window; complex or contested cases, especially those drawing a lot of comments, can take longer.
Can I get email alerts for new extensions applications in Anglesey?
Yes. Click "Set up alerts" on this page and you'll get a daily or weekly email listing every new extensions application published by Anglesey. You can also narrow the alert to a postcode, street, or drawn area.

We check Anglesey's planning portal daily. New extensions applications appear here within a day of being published.