Massachusetts ADU Requirements by Town

351 towns with detailed permit information

Browse ADU permit requirements for Massachusetts towns. Each town has different setback requirements, fees, and timelines — even though the 2024 state law allows ADUs statewide. Click a town to see full details.

Barnstable County

Barnstable

by right

900 sqft
⏱️ 4 weeks✓ Easy

Bourne

by right

900 sqft
⏱️ 3 weeks● Moderate

Brewster

by right

900 sqft
⏱️ 3 weeks● Moderate

Chatham

by right

900 sqft
⏱️ 4 weeks✓ Easy

Dennis

by right

900 sqft
⏱️ 3 weeks● Moderate

Eastham

by right

900 sqft
⏱️ 3 weeks● Moderate

Falmouth

by right

900 sqft
⏱️ 4 weeks✓ Easy

Harwich

by right

900 sqft
⏱️ 3 weeks● Moderate

Mashpee

by right

900 sqft
⏱️ 3 weeks● Moderate

Orleans

by right

900 sqft
⏱️ 3 weeks● Moderate

Provincetown

by right

900 sqft
⏱️ 3 weeks● Moderate

Sandwich

by right

900 sqft
⏱️ 3 weeks● Moderate

Truro

by right

900 sqft
⏱️ 3 weeks● Moderate

Wellfleet

by right

900 sqft
⏱️ 3 weeks● Moderate

Yarmouth

by right

900 sqft
⏱️ 3 weeks● Moderate

Berkshire County

Adams

by right

900 sqft
⏱️ 3 weeks● Moderate

Alford

by right

900 sqft
⏱️ 3 weeks● Moderate

Becket

by right

900 sqft
⏱️ 3 weeks● Moderate

Cheshire

by right

900 sqft
⏱️ 3 weeks● Moderate

Clarksburg

by right

900 sqft
⏱️ 3 weeks● Moderate

Dalton

by right

900 sqft
⏱️ 3 weeks● Moderate

Egremont

by right

900 sqft
⏱️ 3 weeks● Moderate

Florida

by right

900 sqft
⏱️ 3 weeks● Moderate

Great Barrington

by right

900 sqft
⏱️ 4 weeks✓ Easy

Hancock

by right

900 sqft
⏱️ 3 weeks● Moderate

Hinsdale

by right

900 sqft
⏱️ 3 weeks● Moderate

Lanesborough

by right

900 sqft
⏱️ 3 weeks● Moderate

Lee

by right

900 sqft
⏱️ 3 weeks● Moderate

Lenox

by right

900 sqft
⏱️ 4 weeks✓ Easy

Monterey

by right

900 sqft
⏱️ 3 weeks● Moderate

Mount Washington

by right

900 sqft
⏱️ 3 weeks● Moderate

New Ashford

by right

900 sqft
⏱️ 3 weeks● Moderate

New Marlborough

by right

900 sqft
⏱️ 3 weeks● Moderate

North Adams

by right

900 sqft
⏱️ 3 weeks● Moderate

Otis

by right

900 sqft
⏱️ 3 weeks● Moderate

Peru

by right

900 sqft
⏱️ 3 weeks● Moderate

Pittsfield

by right

900 sqft
⏱️ 4 weeks✓ Easy

Richmond

by right

900 sqft
⏱️ 3 weeks● Moderate

Sandisfield

by right

900 sqft
⏱️ 3 weeks● Moderate

Savoy

by right

900 sqft
⏱️ 3 weeks● Moderate

Sheffield

by right

900 sqft
⏱️ 3 weeks● Moderate

Stockbridge

by right

900 sqft
⏱️ 4 weeks✓ Easy

Tyringham

by right

900 sqft
⏱️ 3 weeks● Moderate

Washington

by right

900 sqft
⏱️ 3 weeks● Moderate

West Stockbridge

by right

900 sqft
⏱️ 3 weeks● Moderate

Williamstown

by right

900 sqft
⏱️ 4 weeks✓ Easy

Windsor

by right

900 sqft
⏱️ 3 weeks● Moderate

Bristol County

Acushnet

by right

900 sqft
⏱️ 3 weeks● Moderate

Attleboro

by right

900 sqft
⏱️ 4 weeks✓ Easy

Berkley

by right

900 sqft
⏱️ 3 weeks● Moderate

Dartmouth

by right

900 sqft
⏱️ 4 weeks✓ Easy

Dighton

by right

900 sqft
⏱️ 3 weeks● Moderate

Easton

by right

900 sqft
⏱️ 4 weeks✓ Easy

Fairhaven

by right

900 sqft
⏱️ 3 weeks● Moderate

Fall River

by right

900 sqft
⏱️ 4 weeks✓ Easy

Freetown

by right

900 sqft
⏱️ 3 weeks● Moderate

Mansfield

by right

900 sqft
⏱️ 4 weeks✓ Easy

New Bedford

by right

900 sqft
⏱️ 4 weeks✓ Easy

North Attleborough

by right

900 sqft
⏱️ 4 weeks✓ Easy

Norton

by right

900 sqft
⏱️ 3 weeks● Moderate

Raynham

by right

900 sqft
⏱️ 3 weeks● Moderate

Rehoboth

by right

900 sqft
⏱️ 3 weeks● Moderate

Seekonk

by right

900 sqft
⏱️ 3 weeks● Moderate

Somerset

by right

900 sqft
⏱️ 3 weeks● Moderate

Swansea

by right

900 sqft
⏱️ 3 weeks● Moderate

Taunton

by right

900 sqft
⏱️ 4 weeks✓ Easy

Westport

by right

900 sqft
⏱️ 3 weeks● Moderate

Dukes County

Aquinnah

by right

900 sqft
⏱️ 3 weeks● Moderate

Chilmark

by right

900 sqft
⏱️ 4 weeks✓ Easy

Edgartown

by right

900 sqft
⏱️ 4 weeks✓ Easy

Gosnold

by right

900 sqft
⏱️ 3 weeks● Moderate

Oak Bluffs

by right

900 sqft
⏱️ 4 weeks✓ Easy

Tisbury

by right

900 sqft
⏱️ 4 weeks✓ Easy

West Tisbury

by right

900 sqft
⏱️ 4 weeks✓ Easy

Essex County

Amesbury

by right

900 sqft
⏱️ 4 weeks✓ Easy

Andover

by right

900 sqft
⏱️ 5 weeks✓ Easy

Beverly

by right

900 sqft
⏱️ 4 weeks✓ Easy

Boxford

by right

900 sqft
⏱️ 4 weeks✓ Easy

Danvers

by right

900 sqft
⏱️ 4 weeks✓ Easy

Essex

by right

900 sqft
⏱️ 3 weeks● Moderate

Georgetown

by right

900 sqft
⏱️ 3 weeks● Moderate

Gloucester

by right

900 sqft
⏱️ 4 weeks✓ Easy

Groveland

by right

900 sqft
⏱️ 3 weeks● Moderate

Hamilton

special permit

750 sqft
⏱️ 4 weeks✓ Easy

Haverhill

by right

900 sqft
⏱️ 4 weeks✓ Easy

Ipswich

by right

900 sqft
⏱️ 4 weeks✓ Easy

Lawrence

by right

900 sqft
⏱️ 4 weeks✓ Easy

Lynn

by right

900 sqft
⏱️ 4 weeks✓ Easy

Lynnfield

by right

900 sqft
⏱️ 4 weeks✓ Easy

Manchester-by-the-Sea

by right

900 sqft
⏱️ 4 weeks✓ Easy

Marblehead

by right

900 sqft
⏱️ 5 weeks✓ Easy

Merrimac

by right

900 sqft
⏱️ 3 weeks● Moderate

Methuen

by right

900 sqft
⏱️ 4 weeks✓ Easy

Middleton

by right

900 sqft
⏱️ 3 weeks● Moderate

Nahant

by right

900 sqft
⏱️ 3 weeks● Moderate

Newbury

by right

900 sqft
⏱️ 3 weeks● Moderate

Newburyport

by right

900 sqft
⏱️ 4 weeks✓ Easy

North Andover

by right

900 sqft
⏱️ 4 weeks✓ Easy

Peabody

by right

900 sqft
⏱️ 4 weeks✓ Easy

Rockport

by right

900 sqft
⏱️ 3 weeks● Moderate

Rowley

by right

900 sqft
⏱️ 3 weeks● Moderate

Salem

by right

900 sqft
⏱️ 4 weeks✓ Easy

Salisbury

by right

900 sqft
⏱️ 3 weeks● Moderate

Saugus

by right

900 sqft
⏱️ 4 weeks✓ Easy

Swampscott

by right

900 sqft
⏱️ 4 weeks✓ Easy

Topsfield

by right

900 sqft
⏱️ 4 weeks✓ Easy

Wenham

by right

900 sqft
⏱️ 4 weeks✓ Easy

West Newbury

by right

900 sqft
⏱️ 3 weeks● Moderate

Franklin County

Ashfield

by right

900 sqft
⏱️ 3 weeks● Moderate

Bernardston

by right

900 sqft
⏱️ 3 weeks● Moderate

Buckland

by right

900 sqft
⏱️ 3 weeks● Moderate

Charlemont

by right

900 sqft
⏱️ 3 weeks● Moderate

Colrain

by right

900 sqft
⏱️ 3 weeks● Moderate

Conway

by right

900 sqft
⏱️ 3 weeks● Moderate

Deerfield

by right

900 sqft
⏱️ 3 weeks● Moderate

Erving

by right

900 sqft
⏱️ 3 weeks● Moderate

Gill

by right

900 sqft
⏱️ 3 weeks● Moderate

Greenfield

by right

900 sqft
⏱️ 4 weeks✓ Easy

Hawley

by right

900 sqft
⏱️ 3 weeks● Moderate

Heath

by right

900 sqft
⏱️ 3 weeks● Moderate

Leverett

by right

900 sqft
⏱️ 3 weeks● Moderate

Leyden

by right

900 sqft
⏱️ 3 weeks● Moderate

Monroe

by right

900 sqft
⏱️ 3 weeks● Moderate

Montague

by right

900 sqft
⏱️ 3 weeks● Moderate

New Salem

by right

900 sqft
⏱️ 3 weeks● Moderate

Northfield

by right

900 sqft
⏱️ 3 weeks● Moderate

Orange

by right

900 sqft
⏱️ 3 weeks● Moderate

Rowe

by right

900 sqft
⏱️ 3 weeks● Moderate

Shelburne

by right

900 sqft
⏱️ 3 weeks● Moderate

Shutesbury

by right

900 sqft
⏱️ 3 weeks● Moderate

Sunderland

by right

900 sqft
⏱️ 3 weeks● Moderate

Warwick

by right

900 sqft
⏱️ 3 weeks● Moderate

Wendell

by right

900 sqft
⏱️ 3 weeks● Moderate

Whately

by right

900 sqft
⏱️ 3 weeks● Moderate

Hampden County

Agawam

by right

900 sqft
⏱️ 4 weeks✓ Easy

Blandford

by right

900 sqft
⏱️ 3 weeks● Moderate

Brimfield

by right

900 sqft
⏱️ 3 weeks● Moderate

Chester

by right

900 sqft
⏱️ 3 weeks● Moderate

Chicopee

by right

900 sqft
⏱️ 4 weeks✓ Easy

East Longmeadow

by right

900 sqft
⏱️ 4 weeks✓ Easy

Granville

by right

900 sqft
⏱️ 3 weeks● Moderate

Hampden

by right

900 sqft
⏱️ 3 weeks● Moderate

Holland

by right

900 sqft
⏱️ 3 weeks● Moderate

Holyoke

by right

900 sqft
⏱️ 4 weeks✓ Easy

Longmeadow

by right

900 sqft
⏱️ 4 weeks✓ Easy

Ludlow

by right

900 sqft
⏱️ 4 weeks✓ Easy

Monson

by right

900 sqft
⏱️ 3 weeks● Moderate

Montgomery

by right

900 sqft
⏱️ 3 weeks● Moderate

Palmer

by right

900 sqft
⏱️ 3 weeks● Moderate

Russell

by right

900 sqft
⏱️ 3 weeks● Moderate

Southwick

by right

900 sqft
⏱️ 3 weeks● Moderate

Springfield

by right

900 sqft
⏱️ 4 weeks✓ Easy

Tolland

by right

900 sqft
⏱️ 3 weeks● Moderate

Wales

by right

900 sqft
⏱️ 3 weeks● Moderate

West Springfield

by right

900 sqft
⏱️ 4 weeks✓ Easy

Westfield

by right

900 sqft
⏱️ 4 weeks✓ Easy

Wilbraham

by right

900 sqft
⏱️ 4 weeks✓ Easy

Hampshire County

Amherst

by right

900 sqft
⏱️ 4 weeks✓ Easy

Belchertown

by right

900 sqft
⏱️ 3 weeks● Moderate

Chesterfield

by right

900 sqft
⏱️ 3 weeks● Moderate

Cummington

by right

900 sqft
⏱️ 3 weeks● Moderate

Easthampton

by right

900 sqft
⏱️ 4 weeks✓ Easy

Goshen

by right

900 sqft
⏱️ 3 weeks● Moderate

Granby

by right

900 sqft
⏱️ 3 weeks● Moderate

Hadley

by right

900 sqft
⏱️ 3 weeks● Moderate

Hatfield

by right

900 sqft
⏱️ 3 weeks● Moderate

Huntington

by right

900 sqft
⏱️ 3 weeks● Moderate

Middlefield

by right

900 sqft
⏱️ 3 weeks● Moderate

Northampton

by right

900 sqft
⏱️ 4 weeks✓ Easy

Pelham

by right

900 sqft
⏱️ 3 weeks● Moderate

Plainfield

by right

900 sqft
⏱️ 3 weeks● Moderate

South Hadley

by right

900 sqft
⏱️ 4 weeks✓ Easy

Southampton

by right

900 sqft
⏱️ 3 weeks● Moderate

Ware

by right

900 sqft
⏱️ 3 weeks● Moderate

Westhampton

by right

900 sqft
⏱️ 3 weeks● Moderate

Williamsburg

by right

900 sqft
⏱️ 3 weeks● Moderate

Worthington

by right

900 sqft
⏱️ 3 weeks● Moderate

Middlesex County

Acton

by right

900 sqft
⏱️ 5 weeks✓ Easy

Arlington

by right

900 sqft
⏱️ 4 weeks✓ Easy

Ashby

by right

900 sqft
⏱️ 3 weeks● Moderate

Ashland

by right

900 sqft
⏱️ 4 weeks✓ Easy

Ayer

by right

900 sqft
⏱️ 3 weeks● Moderate

Bedford

by right

900 sqft
⏱️ 5 weeks✓ Easy

Belmont

by right

900 sqft
⏱️ 5 weeks✓ Easy

Billerica

by right

900 sqft
⏱️ 4 weeks✓ Easy

Boxborough

by right

900 sqft
⏱️ 4 weeks✓ Easy

Burlington

by right

900 sqft
⏱️ 4 weeks✓ Easy

Cambridge

by right

900 sqft
⏱️ 6 weeks● Moderate

Carlisle

by right

900 sqft
⏱️ 5 weeks✓ Easy

Chelmsford

by right

900 sqft
⏱️ 4 weeks✓ Easy

Concord

by right

900 sqft
⏱️ 8 weeks⚠ Challenging

Dracut

by right

900 sqft
⏱️ 4 weeks✓ Easy

Dunstable

by right

900 sqft
⏱️ 3 weeks● Moderate

Everett

by right

900 sqft
⏱️ 4 weeks✓ Easy

Framingham

by right

900 sqft
⏱️ 5 weeks✓ Easy

Groton

by right

900 sqft
⏱️ 4 weeks✓ Easy

Holliston

by right

900 sqft
⏱️ 4 weeks✓ Easy

Hopkinton

by right

900 sqft
⏱️ 4 weeks✓ Easy

Hudson

by right

900 sqft
⏱️ 4 weeks✓ Easy

Lexington

by right

900 sqft
⏱️ 6 weeks● Moderate

Lincoln

by right

900 sqft
⏱️ 6 weeks● Moderate

Littleton

by right

900 sqft
⏱️ 4 weeks✓ Easy

Lowell

by right

900 sqft
⏱️ 4 weeks✓ Easy

Malden

by right

900 sqft
⏱️ 4 weeks✓ Easy

Marlborough

by right

900 sqft
⏱️ 4 weeks✓ Easy

Maynard

by right

900 sqft
⏱️ 4 weeks✓ Easy

Medford

by right

900 sqft
⏱️ 4 weeks✓ Easy

Melrose

by right

900 sqft
⏱️ 4 weeks✓ Easy

Natick

by right

900 sqft
⏱️ 4 weeks✓ Easy

Newton

By Right

900 sqft
⏱️ 6 weeks● Moderate

North Reading

by right

900 sqft
⏱️ 4 weeks✓ Easy

Pepperell

by right

900 sqft
⏱️ 3 weeks● Moderate

Reading

by right

900 sqft
⏱️ 4 weeks✓ Easy

Sherborn

by right

900 sqft
⏱️ 4 weeks✓ Easy

Shirley

by right

900 sqft
⏱️ 3 weeks● Moderate

Somerville

by right

900 sqft
⏱️ 4 weeks✓ Easy

Stoneham

by right

900 sqft
⏱️ 4 weeks✓ Easy

Stow

by right

900 sqft
⏱️ 4 weeks✓ Easy

Sudbury

by right

900 sqft
⏱️ 5 weeks✓ Easy

Tewksbury

by right

900 sqft
⏱️ 4 weeks✓ Easy

Townsend

by right

900 sqft
⏱️ 3 weeks● Moderate

Tyngsborough

by right

900 sqft
⏱️ 3 weeks● Moderate

Wakefield

by right

900 sqft
⏱️ 4 weeks✓ Easy

Waltham

by right

900 sqft
⏱️ 4 weeks✓ Easy

Watertown

by right

900 sqft
⏱️ 4 weeks✓ Easy

Wayland

by right

900 sqft
⏱️ 5 weeks✓ Easy

Westford

by right

900 sqft
⏱️ 4 weeks✓ Easy

Weston

by right

900 sqft
⏱️ 6 weeks● Moderate

Wilmington

by right

900 sqft
⏱️ 4 weeks✓ Easy

Winchester

by right

900 sqft
⏱️ 4 weeks✓ Easy

Woburn

by right

900 sqft
⏱️ 4 weeks✓ Easy

Nantucket County

Nantucket

by right

900 sqft
⏱️ 4 weeks✓ Easy

Norfolk County

Avon

by right

900 sqft
⏱️ 3 weeks● Moderate

Bellingham

by right

900 sqft
⏱️ 3 weeks● Moderate

Braintree

by right

900 sqft
⏱️ 4 weeks✓ Easy

Brookline

by right

900 sqft
⏱️ 4 weeks✓ Easy

Canton

by right

900 sqft
⏱️ 4 weeks✓ Easy

Cohasset

by right

900 sqft
⏱️ 4 weeks✓ Easy

Dedham

by right

900 sqft
⏱️ 4 weeks✓ Easy

Dover

by right

900 sqft
⏱️ 4 weeks✓ Easy

Foxborough

by right

900 sqft
⏱️ 4 weeks✓ Easy

Franklin

by right

900 sqft
⏱️ 4 weeks✓ Easy

Holbrook

by right

900 sqft
⏱️ 3 weeks● Moderate

Medfield

by right

900 sqft
⏱️ 4 weeks✓ Easy

Medway

by right

900 sqft
⏱️ 4 weeks✓ Easy

Millis

by right

900 sqft
⏱️ 3 weeks● Moderate

Milton

by right

900 sqft
⏱️ 4 weeks✓ Easy

Needham

by right

900 sqft
⏱️ 4 weeks✓ Easy

Norfolk

by right

900 sqft
⏱️ 4 weeks✓ Easy

Norwood

by right

900 sqft
⏱️ 4 weeks✓ Easy

Plainville

by right

900 sqft
⏱️ 3 weeks● Moderate

Quincy

by right

900 sqft
⏱️ 4 weeks✓ Easy

Randolph

by right

900 sqft
⏱️ 4 weeks✓ Easy

Sharon

by right

900 sqft
⏱️ 4 weeks✓ Easy

Stoughton

by right

900 sqft
⏱️ 4 weeks✓ Easy

Walpole

by right

900 sqft
⏱️ 4 weeks✓ Easy

Wellesley

By Right

900 sqft
⏱️ 5 weeks● Moderate

Westwood

by right

900 sqft
⏱️ 4 weeks✓ Easy

Weymouth

by right

900 sqft
⏱️ 4 weeks✓ Easy

Wrentham

by right

900 sqft
⏱️ 4 weeks✓ Easy

Plymouth County

Abington

by right

900 sqft
⏱️ 3 weeks● Moderate

Bridgewater

by right

900 sqft
⏱️ 4 weeks✓ Easy

Brockton

by right

900 sqft
⏱️ 4 weeks✓ Easy

Carver

by right

900 sqft
⏱️ 3 weeks● Moderate

Duxbury

by right

900 sqft
⏱️ 5 weeks✓ Easy

East Bridgewater

by right

900 sqft
⏱️ 3 weeks● Moderate

Halifax

by right

900 sqft
⏱️ 3 weeks● Moderate

Hanover

special permit

850 sqft
⏱️ 4 weeks✓ Easy

Hanson

by right

900 sqft
⏱️ 3 weeks● Moderate

Hingham

by right

900 sqft
⏱️ 5 weeks✓ Easy

Hull

by right

900 sqft
⏱️ 3 weeks● Moderate

Kingston

by right

900 sqft
⏱️ 3 weeks● Moderate

Lakeville

by right

900 sqft
⏱️ 3 weeks● Moderate

Marion

by right

900 sqft
⏱️ 3 weeks● Moderate

Marshfield

by right

900 sqft
⏱️ 5 weeks✓ Easy

Mattapoisett

by right

900 sqft
⏱️ 3 weeks● Moderate

Middleborough

by right

900 sqft
⏱️ 3 weeks● Moderate

Norwell

by right

900 sqft
⏱️ 4 weeks✓ Easy

Pembroke

by right

900 sqft
⏱️ 4 weeks✓ Easy

Plymouth

by right

900 sqft
⏱️ 4 weeks✓ Easy

Plympton

by right

900 sqft
⏱️ 3 weeks● Moderate

Rochester

by right

900 sqft
⏱️ 3 weeks● Moderate

Rockland

by right

900 sqft
⏱️ 3 weeks● Moderate

Scituate

by right

900 sqft
⏱️ 4 weeks✓ Easy

Wareham

by right

900 sqft
⏱️ 3 weeks● Moderate

West Bridgewater

by right

900 sqft
⏱️ 3 weeks● Moderate

Whitman

by right

900 sqft
⏱️ 3 weeks● Moderate

Suffolk County

Boston

by right

900 sqft
⏱️ 5 weeks✓ Easy

Chelsea

by right

900 sqft
⏱️ 4 weeks✓ Easy

Revere

by right

900 sqft
⏱️ 4 weeks✓ Easy

Winthrop

by right

900 sqft
⏱️ 4 weeks✓ Easy

Worcester County

Ashburnham

by right

900 sqft
⏱️ 3 weeks● Moderate

Athol

by right

900 sqft
⏱️ 3 weeks● Moderate

Auburn

by right

900 sqft
⏱️ 4 weeks✓ Easy

Barre

by right

900 sqft
⏱️ 3 weeks● Moderate

Berlin

by right

900 sqft
⏱️ 3 weeks● Moderate

Blackstone

by right

900 sqft
⏱️ 3 weeks● Moderate

Bolton

by right

900 sqft
⏱️ 4 weeks✓ Easy

Boylston

by right

900 sqft
⏱️ 3 weeks● Moderate

Brookfield

by right

900 sqft
⏱️ 3 weeks● Moderate

Charlton

by right

900 sqft
⏱️ 3 weeks● Moderate

Clinton

by right

900 sqft
⏱️ 3 weeks● Moderate

Douglas

by right

900 sqft
⏱️ 3 weeks● Moderate

Dudley

by right

900 sqft
⏱️ 3 weeks● Moderate

East Brookfield

by right

900 sqft
⏱️ 3 weeks● Moderate

Fitchburg

by right

900 sqft
⏱️ 4 weeks✓ Easy

Gardner

by right

900 sqft
⏱️ 3 weeks● Moderate

Grafton

by right

900 sqft
⏱️ 4 weeks✓ Easy

Hardwick

by right

900 sqft
⏱️ 3 weeks● Moderate

Harvard

special permit

700 sqft
⏱️ 4 weeks✓ Easy

Holden

special permit

900 sqft
⏱️ 4 weeks✓ Easy

Hopedale

by right

900 sqft
⏱️ 3 weeks● Moderate

Hubbardston

by right

900 sqft
⏱️ 3 weeks● Moderate

Lancaster

by right

900 sqft
⏱️ 3 weeks● Moderate

Leicester

by right

900 sqft
⏱️ 3 weeks● Moderate

Leominster

by right

900 sqft
⏱️ 4 weeks✓ Easy

Lunenburg

by right

900 sqft
⏱️ 3 weeks● Moderate

Mendon

by right

900 sqft
⏱️ 3 weeks● Moderate

Milford

by right

900 sqft
⏱️ 4 weeks✓ Easy

Millbury

by right

900 sqft
⏱️ 3 weeks● Moderate

Millville

by right

900 sqft
⏱️ 3 weeks● Moderate

New Braintree

by right

900 sqft
⏱️ 3 weeks● Moderate

North Brookfield

by right

900 sqft
⏱️ 3 weeks● Moderate

Northborough

by right

900 sqft
⏱️ 4 weeks✓ Easy

Northbridge

by right

900 sqft
⏱️ 3 weeks● Moderate

Oakham

by right

900 sqft
⏱️ 3 weeks● Moderate

Oxford

by right

900 sqft
⏱️ 3 weeks● Moderate

Paxton

by right

900 sqft
⏱️ 3 weeks● Moderate

Petersham

by right

900 sqft
⏱️ 3 weeks● Moderate

Phillipston

by right

900 sqft
⏱️ 3 weeks● Moderate

Princeton

by right

900 sqft
⏱️ 3 weeks● Moderate

Royalston

by right

900 sqft
⏱️ 3 weeks● Moderate

Rutland

by right

900 sqft
⏱️ 3 weeks● Moderate

Shrewsbury

by right

900 sqft
⏱️ 4 weeks✓ Easy

Southborough

by right

900 sqft
⏱️ 5 weeks✓ Easy

Southbridge

by right

900 sqft
⏱️ 3 weeks● Moderate

Spencer

by right

900 sqft
⏱️ 3 weeks● Moderate

Sterling

by right

900 sqft
⏱️ 3 weeks● Moderate

Sturbridge

by right

900 sqft
⏱️ 3 weeks● Moderate

Sutton

by right

900 sqft
⏱️ 3 weeks● Moderate

Templeton

by right

900 sqft
⏱️ 3 weeks● Moderate

Upton

by right

900 sqft
⏱️ 3 weeks● Moderate

Uxbridge

by right

900 sqft
⏱️ 3 weeks● Moderate

Warren

by right

900 sqft
⏱️ 3 weeks● Moderate

Webster

by right

900 sqft
⏱️ 3 weeks● Moderate

West Boylston

by right

900 sqft
⏱️ 3 weeks● Moderate

West Brookfield

by right

900 sqft
⏱️ 3 weeks● Moderate

Westborough

by right

900 sqft
⏱️ 4 weeks✓ Easy

Westminster

by right

900 sqft
⏱️ 3 weeks● Moderate

Winchendon

by right

900 sqft
⏱️ 3 weeks● Moderate

Worcester

by right

900 sqft
⏱️ 4 weeks✓ Easy

Understanding Massachusetts ADU Law

The 2024 Massachusetts Affordable Homes Act revolutionized ADU development across the state. Now, homeowners in every town can build accessory dwelling units up to 900 square feet by-right — no special permit required.

However, towns still control important details like setback requirements, design standards, and permit fees. That's why we created this comprehensive guide to help you understand exactly what's required in your specific town.